last weekend i pulled mine all apart to replace all the hoses, and the thermostat housing. Sep 14, 2021 · Heater water pipe (doesn't include o-ring) 19510-RBB-000 Heater water pipe O-ring 91315-PNA-003 Thermostat Housing (not thermostat) 19320-RAA-A02 Thermostat Housing Seal 19322-PNA-003 Bypass Inlet Hose 19504-RAA-A00 Throttle Body Outlet Hose 19509-RBB-000 Thermostat Housing Bolts 90051-PNA-000 May 24, 2016 · The Mopar thermostats I have seen have a thick o-ring type seal that compresses and seals. Using a bit of high temp silicon on the manifold side fixes this problem in most cases. Jul 14, 2014 · Don't use sealant, use silicone grease. Jul 11, 2024 · To replace it, you’ll need a new O-ring coated in coolant to prevent future leaks. I`d take it to a machinist and have him machine the bolt area down, quit just after the bolt holes. With 25K on the clock, dry rot sounds about right. Fit the thermostat in the housing and tighten the fasteners. Oreillys etc dont carry this stuff. 5. I noticed that after I removed the thermostat and re-installed the cover that the housing is dripping very small drops (they don't even fall on the floor they burn up before having the change to fall) thermostat housing flanges. Or just o ring seals. as you can see there are two lines pointing to that gasket. Jan 4, 2021 · Below is what the bypass pipe looks like, you can see little no O-ring left. Kit contents: 1 - Installation Instructions 1 - THFR Ring 1 - O-ring 3 - Bolts 3 - Washers The THFR Ring in this kit is made of 304 stainless steel and will not corrode. I replaced the one that was in there with an OEM one and new O ring as well as scraped the part that connects it to the hose because there was some sort of residue or something on it. Then I bolted on the new Billet Specialties housing. 21 as listed. I guess before even checking the O-ring make sure the hose is fully seated. ) now I have steam that comes out after it sits 10 to 15 min when hot if it sits over night it will blow it all out from what got in it over night so it made things worse now its Jan 7, 2023 · Thermostat Housing Leak – 13 Common Causes. 3L Powerstroke engine. Oct 26, 2008 · Lube the end of your crack pipe/o-ring with a bit of coolant, or with the Gruven crack pipe (AND ONLY THE GRUVEN PIPE you can use WD-40 per Paul. just my 2cents May 19, 2012 · welcome to the forums. See: Service and In this video I show you how to how to fix the common problem of the leaking o-ring that seals the linkage between the back of the water pump and the heater Nov 10, 2023 · Those types of connections rely on an O ring. Reassemble: Put the valve back together, ensuring all parts are aligned and tightened. I took off air filter and the bracket below that it mounts on. In September I changed out the radiator on my 2005 Liberty w/ 3. Looks like my Apr 15, 2017 · I just put one of those Billet Specialties housings with O-ring on my intake. D. May 16, 2021 · Purchased the whole assembly with new thermostats, large o ring for rear inlet pipe included, made by Gates. Sep 22, 2019 · 93 T100 V6 4x4 New Thermostat replacement leak around stud of housing. Feb 20, 2011 · >>>>> I replaced my thermostat and O-ring back in May when I did a coolant flush and fill and I used a "Felpro-O-ring" I bought from Advance Auto Parts and no leaks at all. The used o-ring/seal has been compressed and has endured numerous heat cycles and simply will not still be the same as it was new. The housing does not looked cracked. Everything sits in there nicely. I then tried using the full face gasket on the o-ring housing, it also leaked. Even with the added O-rings seals on those chrome housings they still leaked. The coolant temperature sensor has an O-Ring that can fail causing a slow or moderate leak from the sensor port located on the lower radiator hose. 98 (for a 2004 Sienna). Transmissions shops buy the same sealant, very pricy trade only stuff. I then started it and I lost a whole load of coolant. If you used the injector cup o-ring this is easy to see because it's orange. it will fix about any leakage problem with any housing. There is a machine groove it sets into. If a lube is used it MUST be compatible with the "O" ring material. When installing new housing, apply a very light coat of RTV to hold the O ring in place and help it seal. The reason why it leaks now is because the O-ring has retained memory of it being compressed. looked as though the housing was leaking past the o-ring but pressed on the hose and it was coming by the clamp. I picked up an OEM o-ring this morning at a Lexus dealer, and it seems a bit thicker than the non oem. But that is not a sealant. Jul 31, 2023 · Figure 6 The thermostat will probably be held in place in the water pump. 5. What is this hole for? Reply 1: Hi, There shouldn&# Feb 18, 2015 · The best technique to install these is to push inward while using a small (~10-20 degrees rotation) back and forth twisting motion for the cylindrical part the o-ring is installed on. From the bottom of engine, coolant will leak down from the cluster of cooling system components. I have already replaced the housing once because of the same problem. Regular maintenance is key; inspect the Mar 12, 2021 · This pertains to 2011 to 2014 with a 5 L engine. What looks like atv on engine tranny oil pans is a special factory sealant that dries ready for usage in minutes. Dec 23, 2016 · My radiator drain plug was leaking and when I removed it the profile of the O-ring was almost square. They didn't even check the computer to see if my 3 year warranty was legit (they know me pretty well since I'm in there looking/buying something every two weeks hehe). After inspection it escapes from between the thermo housing and the block/thermo. Dec 7, 2023 · 2015 - 2020 F150 - 5. Replaced it and a bead of high temp black rtv where the housing assembly and bypass joint connect and shazam. I still have an oil leak from that Apr 7, 2020 · I replaced the thermostat to throttle body pipe. So at 65k miles, I think that is the likely problem, the O-ring. They ended up flushing the system, changing the thermostat and replacing the O Nov 7, 2006 · One other possible source for the leak could be from the crank breather hose. I also put sealeant inbetween the housing and intake. The common symptoms of a thermostat housing leak are a stuck thermostat valve, an illuminated low coolant warning light, and the P0128 or P0125 code. Mar 19, 2017 · While there is no traditional gasket, there is a rubber seal (like an 'O" ring. "Service Dec 17, 2017 · Found out the thermostat O-ring gaskets can differ in thickness, according to Rock Auto's listings, AC Delco is Thickness 0. Either the coolant leak is not from the thermostat seal, and is another coolant leak running down into that area and you are not seeing it, or your completing the job, and your workmenship is only lasting a little bit of time. Or better an extra bleeder screw (Part #5184979AA), that way it is easier without need of an extra hand and you will have certainty that the O-Ring is not the culprit. Nov 11, 2022 · 3. 173 and as compared to Gates is Height (in) . The small o ring goes on the temperature sensor with a bit of Vaseline, or spit. Still Nov 21, 2016 · A8 / S8 (D4 Platform) Discussion - Thermostat housing leak? - 2013 A8L 4. Install thermostat housing and thermostat assembly on intake manifold. Dec 26, 2010 · Ive had good luck using the o-ring type waterneck with a stock gasket between the o-ring and the manifold. Replaced it, so far no leaks. My culprit ended up being the crank hose though. 969" and an OD of 2. It's impossible to pinpoint the right parts. Clean up the intake Nov 8, 2005 · I first tried the normal Ford Racing Chrome one with a gasket, then gasket with silicone, then two gaskets, then a different water neck with an O-ring seal. Did you tighten the thermostat housing bolts to the . There does appear to be too much movement of the hose where it connects to the Tstat. but i also buffed the chrome off the bottom, used the supplied o ring, and applied a little ultra black. Nov 13, 2008 · 1999 - 2003 7. ) In shipping for a $2 item doesn't feel right - again, it's the principle! Oct 29, 2021 · Coolant leaking down the right side of engine could be water pump or thermostat. Once in place, insert the upper housing thermostat cover's nipple into the upper May 14, 2005 · After buying my 68, I noticed the thermostat housing leaked slightly. I am having a real problem locating the proper o-ring for the pipe. Any suggestions. Nov 12, 2007 · I think I fixed it. The first 2 drives and cool down cycle nothing leaked; all dry, Then 2 hours later I went to check the radiator level and found that the same leak, behind the thermostat and to the left, had returned. 975" O. i ended up putting the old one back on. at 65k i decided to replace all my hoses, stat and upper and lower housing as preventative maintenance. Check the O-ring: The first thing you’ll want to do if your TRV is leaking is to check the O-ring. The o-rings over time do lose their "Elastic memory" just like the air filter seals do, once used ALWAYS replacejust like the bolts. Jan 30, 2004 · 3. Dec 29, 2020 · I tried to fix it with a vw thermostat o ring and while it was tight getting it fit in the slot in the picture, when I went to put coolant it it was leaking a bunch. Connect throttle body electrical connector (3). I guess the return? Idk but I took off the housing and looked at it for cracks and what not. So I ordered a new aftermarket heater hose (after 3 different o-rings in the hose end failed to seal). I haven't driven my jeep much since then. This gap is the obvious candidate for the leak. The second, larger, flat o ring goes underneath the housing. Used 3M super weatherstrip and gasket adhesive and the housing has an o-ring. The o ring was old so I changed it, changed the thermostat 170 and put it back on, the 230 was still good. Fit the coolant hose and tighten the clamp. Today I went under the car and the shield was soaking wet. Jul 6, 2017 · Overheating seems to be fixed. It’s the O-ring that’s located in the end near the thermostat inside of the radiator hose. Over time, O-rings can become dry and cracked, which will cause leaks. Replacing the O-ring would have been the better option. Took it apart & saw that the upper thermostat housing was buggered up on the sealing surface. Press-in-place designs Mar 8, 2011 · (Also O-ring seal with U-clip) Ordered the hose but was told it comes with the bigger top hose together. The leak has stopped and all is well. I snapped off the ears that hold the thermostat to ensure if somehow it was misaligned, the housing would fit tight against the block. 3L Powerstroke Thermostat Housing Leak Fix Kit" Yes, its a little pricey, but it comes with an oversized o-ring and it really works. I replaced the stat and used the original o-ring. Coolant is visible on the front Feb 19, 2011 · Hi guys, I bought and fitted a new thermo etc yesterday, all went well, refitted all the new parts - thermo and o-ring, bolted all back and topped it up. When installing the new O-ring, make sure it’s securely positioned and properly aligned to guarantee a tight seal. I don't understand why it is leaking? Any ideas or suggestions? Maybe use some RTV? Oct 5, 2013 · So I replaced my thermostat housing unit today with the dorman aftermarket kit and the o ring in the extra port is leaking badly. 3L Power Stroke Diesel - Thermostat O-ring Replacement? - As luck would have it, after changing the coolant over to Delo ELC, the o-ring at the thermostat housing (I have the billet thermostat housing from DieselSite) has decided to give up the ghosta small, but steady leak. 0 leaking thermostat housing - I replaced the thermostat on my dad's Ranger yesterday, using a Federated thermostat. So, away I Oct 8, 2023 · I have only disconnected hoses at the thermostat but on one side it had a O ring inside but it was a terrible fit , really way too big, and I'm wondering if its caused a leak. Gently pry up the edges of the thermostat with a screwdriver, replace the o-ring, and then reinsert into the case. To check the O-ring, simply remove the handle of the valve and inspect the ring. So the O-ring is no longer bound in a circle. Dec 22, 2018 · 2009 - 2014 Ford F150 - Coolant leak from t connector: o-ring question - About a year ago I had a leak from here and replaced the o ring where the upper radiator hose on the passenger side meets the t connector, now I have a leak from the other side where the t connector connects to the water pump. Molded Rubber Seals Increasingly, molded rubber seals are the OEM design choice. I am interested to see how a slightly larger o-ring will work. ? Nov 24, 2022 · 2009 - 2014 Ford F150 - O ring leaking next to thermostat - 2013 Supercrew XLT 5. Sep 28, 2013 · I actually have 2 coolant leaks. May 28, 2007 · If the unit is simply leaking, replace the o-ring and reinstall the original thermostat. I check the Nov 29, 2019 · Couple things here, typically sealant is NOT used on an O-ring installation. Sep 15, 2019 · I removed mine (since I got a new o-ring with the Merchant water pump kit). 0 one of the deciding issues was the fact I had a leak in the timing cover gasket causing a slooow loss of AF. I tried some silicone gasket sealer and it still leaked. I checked Feb 11, 2013 · Just changed my thermostat last weekend on my 01 v-10 it was leaking after install also. I cant even fill up the radiator with the vehicle off without it all gushing out of the thermostat housing. I've now tried no gasket sealer & jiggle valve at 12 o'clock & still leaking. Anyone of them could be leaking. the hoses went as expected, then i had the problems others have faced with the sensor not fitting in the new housing and leaking. I let it run and run. May 29, 2018 · Replace the coolant thermostat F265 with part number 079121115BD. I wanted to determine if it was the thermostat housing leaking or the hard pipe above. Cause coolant is behind it. Thermostat housing leak is a common problem in vehicles and can be caused by various reasons. 96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, LuK clutch Feb 2, 2006 · i have a chrome mr. I replaced the thermostat, o-ring and housing when I did my timing belt service. 00. Same goes for the 2001. started up and found the outlet housing leaking. A small amount of silicone grease may help with installing o-rings. I took it out and the o-ring was nicked in several places. 5 - 1997 7. O rings are a few cents from your local farm store or autoparts store. It is leaking from the thermostat housing. Mar 12, 2017 · When I bought a Toyota thermostat for a friend the thermostat came with a rubber o-ring that went around the actual thermostat flange. it does not leak a drop. Confirm that you don't see signs of a pinched o-ring. Dec 27, 2013 · The aluminum replacement I bought is not an o ring type, would you guys put an o ring above any other thermostat housing? I think the black rtv worked great for the intake gaskets, but maybe ill try without any sealer, just paper gasket and see if that gets me anywhere. 29. 0 150k o ring or entire coolant y - Well the irony of ironies has occurred. Lay the face of the thermostat housing on the paper and move the housing back and forth in diagonal motions until an even pattern is seen all the way across the sealing surface. The t-stat will sit in the ledge in the manifold if someone put sealer in there it probably was to seal up a leaking chrome housing. Refill the cooling system to the proper level. Today I picked up a 160* stat and gasket. However, if the leak is coming from where the housing is mounted, the housing and/or housing gasket has failed. It didn’t have the temp sensor o ring, but I have an o ring assortment set that had the correct replacement. It completely cured my leak problem. It does have a new o-ring gasket Duralast/Flel-pro #35617 and the 3 bolts are tight. I used the old "O" ring and the old Metal clip and the leak has stopped. I pick the o ring up from the dealer for about 4 bucks. I can't pinpoint the leak exactly but when the car has been driven there's steam coming from that area of behind it. O-rings are dynamic seals and need to move to work. It may have ripped or isn't seated in the groove it's supposed to be in. 0 SOHC and now it is leaking from the housing. Sealed up for a week, then drip drip drip all over again. The new thermostat housing looks good too. I changed out the rad and put on the old thermostat with the old o-ring. Slide the o-ring onto the pipe up to where it hits the seat, then slide the pipe into the block and torque to spec. I flushed old coolant & put new thermostat & rubber O ring gasket after cleaning all surfaces & putting some gasket sealer on all surfaces & it leaked. Over time, wear and tear, heat, and pressure can cause the O Ring (#96761-35035) to fray or break, leading to leaks which can be detrimental to your vehicle's performance and safety. Jul 2, 2010 · No noticable fluid loss but def leak at the thermostat. May 19, 2007 · Leak. I bought a new thermostat housing and again, it still leaks. ) It's not going to be above normal pressure anyway. Slip the o-ring onto the thermostat from the top. In case of doubt, just have an extra O-Ring ready to replace it. If the leak is coming from any of the hoses, the leaking hose and clamp will need to be replaced. The one I have has 3 O-rings: one large one on the bottom, and two more on the piece that rotates. You have 1 of 2 problems. The thermostat housings all look wrong too. All the Jul 2, 2008 · The housing generally cracks in the portion that surrounds the O-ring. very loose. _____ Sep 12, 2019 · You can also sort of feel if the O-Ring is OK by the amount of force needed to crush it when you tighten the bleeder. I went to Harbor Freight, Autozone and Napa and no one has anything like this o-ring. Aug 9, 2011 · The THFR Ring, along with this new style o-ring, effectively eliminates the thermostat housing coolant leaks that plague the 7. The previous owner had an o-ring, paper gasket, and RTV. Sep 29, 2011 · I replaced the thermostat on a 99 Explorer 4. Here's what worked for me: - Of course, make sure the hole under the thermostat housing is clear of crud; mine was actually quite clean. However, the two main causes are usually due to degraded gaskets or loose screws. This should have an ID of 1. 8L. 395"). 0L V8 Thermostat Housing Leak - My thermostat housing has been leaking at the bottom. Thanks for the reply! Feb 20, 2015 · The old gasket was completely compression set (flat) and brittle. its a flat oring Aug 30, 2023 · There should be three new o rings in the box. Omit the O-ring. The leak is more than likely from the o-ring losing it's shape and allowing the coolant to leak out. Jan 21, 2010 · I have a small leak under my thermostat housing that leaks on to my block. Please help! Oct 14, 2008 · just got finished spending the day replacing the water pump, tensioner idler pulley, thermostat and coolant outlet housing on my sisters 05 explorer 4. - But every few years, it leaks below the tstat housing area, so I have to replace the seals, which are a few dollars, no big deal. lbs. 0. A new O-ring and all is good. 3 days Wet the o-ring with some fresh coolant. Mar 15, 2017 · If it is one of the thermostat housings that allows you to rotate the neck position, there might be two O-rings inside the housing that you can't see. Jun 16, 2015 · Just wanted to follow up, you guys were right (per usual) and it was in fact the thermostat that was leaking. I noticed the old "O" Rings are a bit thicker than the new one's I got from the Kit I purchased from german auto parts. It could also mean that it is the wrong "O" ring. If the surface is pitted, that will make it difficult to seal . There was a recall on some 2015 models for the ECM update & turbo o-ring leak fix. If it's coming from the temp sensors, you may not need to change the whole housing, just the O rings around the sensors. 00 o-ring when they can force you to purchase a $50. to do this you need that o-ring as well as TWO gaskets marked 160 in your diagram. 5 and later B5 thermostat housing o-ring. Lubricate the o-ring on the thermostat nipple (a new thermostat is recommended) before inserting it into the coolant tube. Thinking it was just cheap water necks, I went and spent $100 on a CSI aluminum swivel type with another O-ring seal. My issues with Wahler t-stats have always been weepage around the heating element. But my new issue is that the old thermostat housing I had had an o-ring in it that sealed against the pump housing. Looks like it's leaking from a small hole. I have found straight up water necks for SBC's by Trans-Dapt and Billet Specialties and both of them use built in o-rings instead of gaskets. Wasn't looking forward to pulling engine. Jan 19, 2017 · I replaced the plastic housing and used a 50x4mm o-ring from O'Reilly auto parts store. I am inclined to dispense with the O ring and use a conventional paper gasket with a bit of sealant. Of course it leaked. I initally replaced the the thermostat and could not get a a new o-ring gasket that goes around the thermostat so I used the old one. 3. Grooved seals are slotted to fit around the edge of the thermostat. I had the same problem,my fix was got a fatter O ring ,(the one they give you and replacements are just to small diameter for the grove in the neck),had to cut it smaller diameter glued the ends with weather striping cement ,then cut a gasket out of a piece of inner tube using a regular gasket as a template,then put in thermostat,rubber gasket,and neck with fatter O ring,little sealent May 17, 2008 · The o-ring should then be lubed using a lithium base grease, this will help the o-ring slide and seat properly on the pipe and in the block, as well as prevent it from getting glued onto the pipe when you remove it next time. 0L take it to 16 psi. I thought it was the thermostat O ring or the oil presure switch and ended up replacing the O ring anyway. Plastic housing is genuine vw. Installed a new Ford Motorcraft part (only $10 and made in Great Brittain!). x2 on the pot metal waternecksthey warp like crazy and almost always leak. Oct 31, 2015 · So if you take the housing off get a new thermostat(205), new housing and O ring and get yourself some stainless bolts to replace the stock ones to prevent future bolt breakage, they're metric if I remember right. If I remove the thermostat housing, is there any other seals worth replacing as well? (Besides the thermostat housing gasket itself). Long story short, went to Nappa picked up a new thermostat and the difference is very obvious, the Nappa version is much thicker and Aug 31, 2023 · RPM Air gap manifold, and a 90° swivel thermostat housing unknown manufacturer. Decided to replace Y pipe and upper radiator hose this time. After filling the reservoir to the full line, the next day it's back to half full. If you have a mirror use it to look up at the bottom of the thermostat housing socket. Aug 11, 2023 · The thermostat housing has an "extrusion" with a gap for the "peg" on the thermostat. - Tstat housing is OEM Plastic. Does not leak alot but enough that I have to clean it off the block where it pools up. I have tried both o rings that came with the kit to no avail. 7. Jan 12, 2020 · 2003 GX470 with 150k miles. Mar 2, 2021 · The thermostats (#3 and #4) have a rubber ring around them to seal against leaks instead of a gasket. Mar 25, 2017 · best to use a thick old piece of glass, laid on a flat table or something that is flat. When I first noticed a leak I just decided to replace the thermostat while in there. Drained the coolant, removed the housing and found it was a Taiwan O-ring style housing. It did not come with an o-ring, so in a pinch, I reused the o-ring on the old thermostat. May 20, 2010 · 1966 Coupe San Jose C-code/Rebuilt 289 and C4/ Pony Interior/ Ported Stock Heads/Roller Rockers/Edelbrock RPM/ Demon Carb/ Hooker Comp Headers/Flowmaster 40's/Pertronix Dist/ 4 Wheel SSBC Disc Brakes/17" Torque Thrust Wheels/3. was probably the original leak but 100k Dec 18, 2019 · It was not corroded at all, but several gaskets needed to be replaced. This would have allowed me to see everywhere it was leaking because I had the head off. Is an old o-ring is OK to reuse? I used this for the coolant leak I have in my head driver side cylinder 3 no it would only leak a little I would have to fill my reserve every 1000 miles after I used this (I heard nothing but good about this stuff . sand that puppy till its smooth. These seals and o-rings (#10 and #11) must be in good condition to seal. Coolant was leaking at the thermostat housing O-ring, as well as at the clamp. ( teflon tape has Feb 9, 2014 · Thanks! The hose I replaced the old one with is a BMW hose from the dealership and the o-ring and everything looks good. Installation is the reverse of the removal steps. Feb 12, 2004 · I could tell someone else had struggled with it before by the amount of rtv on the o-ring/flange, and a spare o-ring laying in the battery tray. plastic fittings? My hoses are in excellent condition but I have a slight drip from the deformed O-rings. Ebay Fix. My Q is do these hoses on the side that attaches to the thermostat, they sort of clip into place with a plastic solid O ring inside as well, do they also have a rubber O May 7, 2017 · 28. Took it into my dealer, no questions asked. Clean up the thermostat gasket mounting area on the cylinder head. The "expert" at Napa said all I needed to seal it was the seal on the thermostat itself and that'd do the trick. One thing I didn't do that I regret was not doing a pressure test before draining the coolant. Place your pipe clamps onto the Turbo Return Tube and gently slide the Turbo Return Tube over to meet the other nipple. It is only leaking from the extra port where the plug is installed. But if it's not leaking when warm, then you'll have to try when cold. Pump and belts done by PO at ~120k, and I just replace the thermostat inlet housing o-ring which I though was causing the leak due to visible seepage. Sep 29, 2021 · Lubricate the o-ring, on the end of the Mini Coolant pipe, with silicone grease before inserting into the water pump mounting boss hole. Indeed the main top hose on the radiator has a plastic connector which has an black rubber O-ring inside and a metal U-clip. 55 Trac Loc/Currie Axles/ Viper Blue-White Stripes Jun 25, 2023 · Dorman 926-168 O-rings (says OE fix) comes with larger O-rings for the radiator hose, and smaller for the thermostat housing. 4. I prepped the intake side by stripping all old gasket and sealer off and block sanding it. The thermostat housing must not be cracked and bolts must be properly torqued. No more puddles in the driveway. A few months later, I was getting a small dribble of coolant down the oil pan. Which pic is the leaking assembly. If they don't seal, replace them. See if you can get it machined flat and clean. 0L SOHC with 150k miles I replaced the thermostat & o-ring at 145k miles. All of th Mar 10, 2013 · The leak comes from the o-ring that "seals" the electrical component of the thermostat and is the second thermostat that fails like this. Silicone RTV on may work, but it may only be a temporary fix. Oct 21, 2022 · Thermostat housing temp sensors leaking, O ring replacement, fix. If the leak happens when cold and especially overnight, as you see a puddle on the ground on a cold morning, that's usually the water pump seal. The thermostat housing and those 2 o-rings. Aftermarket one has plastic for the pipe and the old one only seemed to have a shrunken O-ring on the thermostat housing connector, it was flush with the pipe plug & clip part. assembled. I did not realize the housing was 3 parts and the leak is lower than we thought. May 1, 2013 · Take off the vtec cover and peak down between the runners on the manifold. Oct 16, 2016 · If it is coming from the thermostat location in the housing, it could simply be a thermostat gasket/O-ring leaking. The new one, not so much; not even a seat for it like the old housing had. Aug 23, 2020 · Even water pumps come with a special no sealant gasket on newer cars. Nov 8, 2014 · The plate and O ring that you mentioned places even pressure all around the housing to the point that it clamps down flat. Jul 26, 2003 · Hello, I replaced the thermostat and o-ring a few weeks ago and have done so about 2 other times, but still get leaking. Nov 27, 2009 · Part 1: the thermostat housing cracking and leaking seems to be a growing problem with the V6`s lately to cars with as little as 30k to 100k. Replace the Washer or O-Ring: Carefully disassemble the valve, locate the damaged washer or O-ring, and replace it with a new one. gasket housing on my 468. It's been leaking since. I oriented mine the same as the old one that came out, but I don't think it makes a difference. Nov 9, 2005 · I dealt with a similar leak last year. Jan 18, 2015 · Go on eBay and search "Ford 7. I replaced the original at the same time that all the other parts of the cooling system and it failed 2 months after so I bought a new one (same brand) and this week I noticed the same leak as in the previous Feb 8, 2003 · I did some research on the o-ring and as far as i can tell it is a 50mm x 4mm o-ring. (Wrong size or material)The use of a tiny amount of lubricant is sometimes helpful to prevent damaging the "O" ring during installation but plays no part in sealing. Already replaced O ring on top hose 20k miles ago. The funny thing is that when I replaced my thermostat back in the spring time I kept the old "O" Rings and Clips. Nov 11, 2018 · It was a very simple job, took around half hour to complete. No more leaks! Well, from there, at least - I think my valve cover gaskets are weeping :- Sep 18, 2021 · (For 3. Position thermostat (2) in thermostat housing (1). Tighten bolts (1) to 28 Nm (250 in. Ill do the following: 1. 0, 4wd, 84k miles. Jan 20, 2014 · Thanks Dinosaur the o ring on the front water bypass joint was exactly where my leak was coming from. Check for any remaining leaks. I put in an ACDelco thermostat with a fleepro rubber gasket. 2. The O-ring is a small rubber ring that sits between the body of the valve and the handle. When I dumped my Dodge ram to get a 2017 Ford 5. No other gasket or sealant was used. If you ar Dec 7, 2022 · Hi brains trust, 2003 ST1300, I replaced the thermostat (all genuine Honda) 2 years ago and at the same time replaced the O Ring (gasket), drained and replaced all fluids ect, approx 6 months later it started leaking from the O ring, only when engine is cold on warm up (until thermostat opens up), replaced O ring again for 2nd time, also this time using Permatex Blue RTV Silicone Gasket maker Jul 14, 2012 · Install a new O-ring, on the thermostat and position the thermostat in the lower intake manifold. Oct 13, 2023 · I am struggling fix a leak on a 2008 Toyota Corolla LE 1. If so replace housing, o-ring, hard line, and thermostat (since your already down there). Dec 25, 2015 · It was a rubber o ring. Seals are OEM dealer. So now I am replacing every gasket and o-ring. A non-functional O Ring (#96761-35035) can lead to engine overheating, decreased fuel efficiency, and in severe cases, engine failure. The only real parts in the system that actually fail are the thermostat, the o-ring between the thermostat and water pump, the gasket between the water pump and the engine, or one of the gaskets in the plastic pipes that lead to and from the pump. Jan 7, 2021 · My dodge avenger sxt 13 2. The Indian head would be used to seal the housing and gasket to the manifold itself. (you only need O-rings if you are trying to keep the original T connector and hose). BMW charges $11 for each effing o-ring, the thieves. Apr 17, 2013 · That was the o-ring i needed to replace - 122 and not 138. Dec 3, 2022 · I'm sorry, but comparing a used o-ring/seal to new o-rings/seals is not a valid comparison. I bought the housing, plug, sensor and thermostat from Steve @ Tousley and replaced everything. (20-30 Nm). Surely this would work without leaking, right? Jun 20, 2013 · I am having the same leak from the o-ring on the outlet pipe at the thermostat housing as you were, zeevert. May 5, 2012 · The o-ring on the coolant bleeder is much larger then the one on the heater return hose/pipe down at the thermostat housing. Feb 15, 2021 · Somebody on one of the 3 series forums found a third option - a m3x37 o-ring fits just perfectly! Looks like viton o-rings are easy to source on the internet, but I'm in Canada and something about paying $40 US ($1,000 CDN approx. Silicone doesn't work well on those chrome style o-ring thermostat housings. A quick story for those of you with a thermostat housing leak. Oct 11, 2010 · 2003 530i --- Can anyone tell me what size O-ring is required for the radiator/thermostat etc. i had the clamp clamped in a different position than before moved it to where it originally was and leak stopped. I undid the bolt and removed the plastic connector, the o ring around the plastic connector was broken. well actually i replaced the water pump. Jun 29, 2021 · I changed out the thermostat, o-ring and top radiator hose inlet today. I bought the thermostat at a Lexus dealer, but they didnt have an o-ring, so I bought it at an autoparts store. If you pull off the housing, you should see the black ring and the track that it settles into. the four seasons thermostat housing should have o rings too. Refilled the radiator and started it. After refilling the coolant I notice a small leak coming from the thermostat housing. 00 hose assembly). I was lucky, it was only the plug and sensor leaking, my housing wasn't broken, so now I have a spare, ready to go! Dec 5, 2012 · 1994. Do not use RTV or silicone sealer when assembling these parts. The third goes on top of the thermostat itself. If that became dry rotted, I could see how that could cause a leak. Unless its a compression type o-ring that gets crushed completely, then use a non-hardening type sealant not silicone. 7L I have a leak coming from the o-ring o nthe thermostat housing where the upper radiator hose connects to it. As stated, no there isn't an O-ring around this, or at least not during dismantling. You need to pull out the hose after removing the clip then pick out the o ring (it should be on the end of the hose) and get an exact match from the selection at the store. Thanks again Jan 21, 2014 · 1. Torqued the two bolts to 20 ft-lb and call it a day. Dec 28, 2022 · To repair the problem, simply remove the two 10mm nuts that hold the thermostat to the case. water pump housing on my 440 with the original thermostat housing and it leaked at the thermostat housing gasket. Under that you'll see the water pump, on left hand side of the pump about 1" from the block is a plastic connector held on by an 8mm bolt. It is a nice aluminum piece with an O ring. I had a similar coolant leak myself, the o-ring was jacked up. once i got it all off, the sensor did not fit into the housing. May 18, 2012 · Make sure the flat surface on your intake is, indeed, flat and clean or it may be causing your leak problem. Make sure your bolts dont bottom out in the intake. Over time rubber gaskets become brittle and may crack, leading to leakage. Oct 28, 2022 · Hello everyone, Im flushing the coolant from my Ninja 400 and removed the thermostat so I can flush water through the system. ). Apr 16, 2012 · I recently installed the Mopar Performance alumn. Sep 13, 2014 · 1983 - 2012 Ranger & B-Series - 04 Ranger 4. that o-ring 138 sits lower than the front of the engine so if it was leaking your coolant would be dripping down the backside of the engine. The o-ring that I previously used was non OEM. 283". The O-ring is the seal and the slip snaps in a groove in the plastic receiving connector on the top on the radiator. Nov 5, 2015 · the glow to the left of the engine oil filter is the only discernible area that is leaking coolant, i was thinking of buying an OEM toyota thermostat (with o ring ) and an aftermarket thermostat housing cover made by "four seasons" for my 5sfe. These are the two most common areas. my hose was not that old it has the pinch type clamp on the hose. The cooling manifold is held to the intake head by three 13 mm bolts, torque spec is 89in pounds. 3L Power Stroke Diesel - Thermostat housing leak ? - Ok. I saw that some trucks only have 1 o-ring here and the updated part has 2. Place the thermostat housing on the lower intake manifold and install 2 retaining bolts. The housing cracks before the O-ring goes bad. After I removed I found coolant drops where the plastic thermostat housing gets attached to the metal. The rubber band idea is excellent. This O-ring connects behind the water pump. 4l started leaking from the bottom of the thermostat housing. Hopefully I can get it done on Monday. Always verify the small crossover tube as this one was also leaking. Again, use a bit of Vaseline, or spit, to ensure they seat properly. BMW will sell only the complete hose assembly ( why sell you a $2. Can I change out the o ring without having to remove the whole water pump? Sep 16, 2011 · WARNING: I replaced my original thermostat with a peace of Garbage Duralast brand from AutoZone, after rooting around on the forums I was told that the Nappa brand thermostat O-ring was thicker and more on spec. So if the o ring a plastic piece are where they should, when I go to fill the coolant tank, should it still leak a little before it pressurizes? Nov 22, 2012 · Come to find out the REAL source of the leak was a bad O ring on the pipe (right side of pic) that connects the bottom of the thermostat housing to the top of the water pump. Troubleshooting tips: double-check the O-ring‘s installation and alignment to avoid premature failure. Apr 7, 2015 · The problem isn't so much the O-ring but the mating surface of the manifold which isn't machined fine enough to accommodate the use of an 0-ring. with no gasket i even changed thermostat and reused same o ring and still no leak. Check to see if its coming out of the hard line going into the top of the thermostat housing. The "O" ring itself is designed to seal. I had coolant on top of engine and had trails front and back of engine. creating a raised area for the gasket around the stat. Then slip the thermostat (with its o-ring) into place in the lower housing. as far as sealing the bottom 1yankees, there is a o ring you can replace under the bottom housing. Replaced the gasket plus the two o-rings on the oil lines leading to the thermostat housing for about CAD $40. So, thermostat then o ring then Aug 29, 2009 · Re: Thermostat housing keeps leaking (ZachA) Did you use lots of force to install it? The o ring is likely the problem. Oct 27, 2021 · A thermostat leak is usually caused by movement in the coolant rubber hose, damaged housing, and a worn seal. Well, I had trouble getting the pipe back in and it leaked like crazy. If the aluminum mating surface of your intake manifold is corroded and pitted, that could be the problem. But put in all new when replacing , T-stat, housing, O-ring. Then it was leaking from the heater hose connection. Dec 16, 2016 · Any auto parts store should be able to get the seal separate from the thermostat. Ordered new Motorcraft on both parts, in the mean time waiting on parts noticed another leak. Pull the thermostat out of the water pump housing in the direction of the blue arrow. quite screwing w/ it and do it, u won`t be sorry. Message me for an Mar 6, 2008 · M50 Tstat Gasket anyone? - Car is 1998 BMW 528i with 170K, cooling system up-to-date. As a fall back I ordered today a set of -329 viton o-rings (ID 1. Depending on the application (where used) a vey light rubber grease might be used to lubricate the O-ring for installation. My original thermostat housing wasn't leaking , just replaced the thermostat and O-ring gasket as up dating maintenance. Did not use any sealer or anything else with it; just the O-ring. Molded rubber O-ring seals (featuring either a round or square cross-section) fit into a groove or counter bore. Aug 3, 2023 · Identify the Leak: Determine the exact source of the leak within the valve assembly. Jan 30, 2012 · Hey everyone my thermostat housing started leaking a few days ago and I bought a new thermostat and o ring to do the job today. All the GM parts sites have horrible parts diagrams. 0 For past couple days I found the coolant in the expansion tank gone. Install the radiator upper hose to thermostat housing (2). Should I just buy the whole housing from Rockauto? Here is a pic, where I have the Jan 25, 2021 · 1987 - 1996 F150 & Larger F-Series Trucks - 1995 F-150 5. Install the thermostat in the housing. Whoever changed it last use rtv to seal it, so yesterday I took everything apart, put on a new gasket and didn’t use any rtv and coolant would just pour out the bottom. Cut a gasket from Felpro gasket material, and used a little Ultra Grey on both sides, it's working pretty well, so far. Coolant leaking down the left side of engine can be from coolant hoses or from the oil filter stand / housing. A new O-ring should be used. Feb 6, 2011 · The thermostat housing leaks despite best efforts to retighten. Mine was brittle and cracked at the clamp and splashed out oil during a DE. When I did the radiator, I removed the thermostat to help in draining the block. 2001 Ford Ranger 4. It was dripping down from that pipe onto the little hose and at times the fan would throw bits of coolant spray around in the engine compartment. It wasn’t leaking, I’m assuming this should be the type of housing where the o-ring should seal by itself? The old o-ring is in “okay” shape, seems a little flat and mildly distorted in one spot. Sep 15, 2008 · The o-ring is chewed up and the channel for the o-ring on the water neck appears nicked up. Use the thermostat gaskets with adhesive on one side. Aug 12, 2013 · My o-ring thermostat housing developed a small leak after a few years, I took the o-ring out, scored up the groove, filled it in with JB-Weld Steel Stick, and sanded it perfectly flat. Oct 24, 2007 · Valvecover leaks, oil seeps down the block where it comes into contact with the rubber o-ring, swells the o-ring and breaks the housing. I did have to disconnect the fuel line when I did this job. WD-40 on OEM o-rings could result in deterioration of the o-rings, those supplied by Gruven are much tougher and more resistant. It should be noted that all o-rings when installed should be liberally coated with fresh, clean motor oil prior to installation. I prefer to use a good cast iron thermostat housing because I, too, have had the O-ring style leak. Dec 4, 2019 · 2012 Ford F-350 6. I thought it was a bad water pump leaking anti freeze But I think it's gotta be the thermostat housing. Jun 21, 2010 · Once the new o ring is in along with the tstat, bolt the housing back on making sure the o ring is still inside on top of the Tstat and bolt the 2 bolts to i believe 8ftlbs Toss the coolant back in and check for leaks Sep 17, 2010 · Is the o-ring at that connection the same o-ring that seals the connection at the water pump? It appears that I may have a small leak there and I was looking to seal it back up. The o-ring is about the 1 inch in diameter but it is a wide (almost square) or ring (if that makes sense). Dec 5, 2019 · Coolant leak bottom of thermostat housing. No leaks at all. If yours didn't come with the oring that goes around the flange it looks like Auto Zone sells these for $1. I've seen this is a common problem through research but nobody lists the fix. Jul 18, 2019 · I replaced my thermostat and the thermostat housing, tried both the normal gasket and the o-ring style gasket, the hoses and the hose clamps but it still leaks like crazy. Oct 15, 2012 · The new thermostat should go in dry, no sealent on the thermostat itself. Tighten the bolts to 15-22 ft. The car was leaking from that area so I ordered the gasket and put it on. jzdzsf iqnif ejmz lvmjc rzlkgf xli eadno bpoga njhbzf pcwjcq