2.4journey2013 Posted August 23, 2020 Report Share Posted August 23, 2020 The housing itself doesn't look to be cracked. It's seeping from the cylinder head to where it mates at the secondary thermostat. can I apply a small amount of RTV to seal that? It's a new thermostat and everything drove fine for a few days then started excessively leaking. Quote Link to comment Share on other sites More sharing options...
John/Horace Posted August 23, 2020 Report Share Posted August 23, 2020 Weird. Can you post pic of old thermostat unit. Was a new gasket used on the surface that is leaking. I would buy new gasket and try again using torque wrench for exact tightness. Atv might function as a temp repair. Newer cars seldom use rtv for gaskets on aluminum surfaces, requires drying time and repairs need to be super fast. Even water pumps come with a special no sealant gasket on newer cars. Or just o ring seals. What looks like atv on engine tranny oil pans is a special factory sealant that dries ready for usage in minutes. Transmissions shops buy the same sealant, very pricy trade only stuff. Oreillys etc dont carry this stuff. Which pic is the leaking assembly.? Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 23, 2020 Author Report Share Posted August 23, 2020 Right where the secondary thermostat is, it looked like it came with a brand new seal on it that sits in that groove. That square looking one O-ring gasket I didn't know was replaceable. Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 23, 2020 Author Report Share Posted August 23, 2020 Here's a decent picture. Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 23, 2020 Author Report Share Posted August 23, 2020 (edited) Also, I don't see a gasket for the outline of the secondary thermostat that sits in the head. Would the picture attached be the correct gasket to sit against the head and water housing or is that for the main thermostat facing the front towards the radiator? Edited August 23, 2020 by 2.4journey2013 Quote Link to comment Share on other sites More sharing options...
Armando G Posted August 23, 2020 Report Share Posted August 23, 2020 If you want to be thorough (and you should in this case), you should remove it and inspect it. The gasket could have pinched, there may be some debris at the point of contact, or the part may have failed itself. Putting a bandaid on this type part is never a good thing, and you will be in there fixing it again soon anyway. I assume you cleaned both surfaces before installing it but sometimes sh#$ happens. Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 24, 2020 Author Report Share Posted August 24, 2020 Yeah, unfortunately. Will be redoing it tomorrow. Quote Link to comment Share on other sites More sharing options...
John/Horace Posted August 24, 2020 Report Share Posted August 24, 2020 Looks like there is that style of gasket used on the thermostat assembly, Rock lists this same part as well. Match up what’s already there from the factory. Like OP is saying, go slow and avoid pinching gaskets. Lubricate parts with glycol so they slide together and seal properly. This is a involved cooling system set up. > 2014 > JOURNEY > 2.4L L4 > Cooling System > Thermostat / Thermostat Housing / Water Outlet Seal Price FEL-PRO 35826 {#4884572AA, C32201} Info Use: Thermostat Housing; Thermostat seal CAD$1.69 Add to Cart FEL-PRO 35837 {#4884703AA, C32193} Info Use: Water Outlet; Outlet CAD$5.43 Add to Cart MAHLE C32201 {#4884572AA} Molded Rubber Info CAD$5.53 Add to Cart MAHLE C32193 {#55111016AC} Molded Rubber Info Thermostat Seal (Only 1 Remaining) CAD$22.69 Add to Cart Thermostat Housing / Water Outlet Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 24, 2020 Author Report Share Posted August 24, 2020 Yeah, I have the square seal now and the new thermostat that sits in the cylinder head had a brand new seal. I'll be redoing it later today. Thanks everyone Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 24, 2020 Author Report Share Posted August 24, 2020 I pulled it apart and the secondary thermostat seal had failed, multiple spots. Replacing that seal as well as the square one. on a side note, I couldn't find the O ring for the water pipe anywhere? Does anyone know the diameters of the one we use? Quote Link to comment Share on other sites More sharing options...
2.4journey2013 Posted August 26, 2020 Author Report Share Posted August 26, 2020 This is closed/resolved. the secondary thermostat seal and the other seal on the water housing failed. I replaced them everything is good. No leaks. thanks! John/Horace and OhareFred 1 1 Quote Link to comment Share on other sites More sharing options...
Armando G Posted August 30, 2020 Report Share Posted August 30, 2020 On 8/23/2020 at 3:56 PM, Armando G said: If you want to be thorough (and you should in this case), you should remove it and inspect it. The gasket could have pinched, there may be some debris at the point of contact, or the part may have failed itself. Sounds like you got some good advise... larryl 1 Quote Link to comment Share on other sites More sharing options...
ronnellbagz Posted March 2, 2022 Report Share Posted March 2, 2022 (edited) On 8/23/2020 at 2:23 PM, 2.4journey2013 said: Also, I don't see a gasket for the outline of the secondary thermostat that sits in the head. Would the picture attached be the correct gasket to sit against the head and water housing or is that for the main thermostat facing the front towards the radiator? @2.4journey2013 Did you actually place the above gasket seal in between the secondary thermostat and Engine Block? Edited March 2, 2022 by ronnellbagz Quote Link to comment Share on other sites More sharing options...
John/Horace Posted March 2, 2022 Report Share Posted March 2, 2022 (edited) Neither, it’s in the red circle in pic. It sits right against side of engine block. It’s called a flange gasket. So it is not normally disturbed if just changing coolant manifold assembly. Being thorough, you could change it out if you wanted. Most thermostats come with their own special gasket with a groove it. Like in pic, thermostat sits in groove nice and snug, then pops into housing also slightly snug. Edited March 2, 2022 by John/Horace Quote Link to comment Share on other sites More sharing options...
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