My 2010 Jeep wrangler was leaking radiator fluid from the back of the thermostat housing. I did not use the extra gasket and there are no leaks so far.
The Fel-Pro 35651 gasket is an aftermarket piece that helps keep the seal when the thermostat's gasket flattens out. After about 6 months or so the thermostat's gasket will typically crap out on everyone from it heating up and flattening down. I just had the exact same issue on my wife's 2007 Wrangler. When it comes down to it, if the thermostat is working properly (but leaking right there), you apparently can just add the $9 Fel-Pro 35651 gasket and you're good to go. I did exactly as you did. Due to the fact that I had it all taken apart, I added the 35651 and the new thermostat. Bled/burped the system with the cold engine and the radiator's cap off, added a tad bit more coolant, and she was all good.
Awesome! Thanks for the confirmation on the gasket. I still have my gasket just in case, but so far, no leaks from the thermostat housing. My radiator problems are another story.
I replaced the thermostat and after a few weeks it started leaking again. Gasket 35651 goes on the block housing than the thermostat on top? I may just buy a new thermostat and throw that gasket as well. Thank you
@@kojiki88 Thanks for the update! My radiator has been leaking too, so now that I've finally fixed the radiator, I'm leaking coolant out of the thermostat housing enough that it has become noticeable. I'm going to have to put that gasket on the thermostat house also.
You can burp the system once you're finished by starting the vehicle with the radiator cap off. Only do this from a cold start, run it for a minute or two with the radiator cap off, when your done re install the cap and you should be good to go. Add some radiator fluid if needed during the process.
Nice job, gives me the confidence to do it. It's always a stressor when you have to work on your daily driver. No room for error. Luckily the thermostat is cheap and easy to replace. I noticed you didn't replace the housing. I probably will on mine however the part is on backorder from Quadratec and I'm eager to just solve the leak right away.
Thanks! Yes, the thermostat is a fairly easy replacement! You definitely have less room for error when working on the daily. I didn't have any issue with the housing part so thats why I didn't replace it. I hope your replacement goes smooth!
