I have been getting a leak from the lower part and the passenger side of the thermostat housing. The intake is a performer RPM and the thermostat housing is just a stock unit. The gasket is the type the peel and stick type. We did it twice and it still leaked. Anyone have any suggestions?
I went and got a 15 dollar aftermarket one with a new seal and used some sealant along with the seal because I was having leaking problems too but that fixed it
I gave up on the stock type and went with an aftermarket with the o ring. No more leaks. It's a chrome one, so if you're wanting the stock look this may not work for you.
It may be slightly warped from over-tightening or heat. Take a flat file the next time you remove it and lightly smooth the gasket face in all directions. You will see if the file touches mostly in one place versus the entire surface.
make sure the...t-stat flange...is seating all the way into the intake. also...take a piece of sandpaper and...reface...the t-stat housing...mounting surface... ......
I use the sandpaper and lay it on a flat surface then sand it flat.. I also use a gaskett with Permatex brush on sealer that looks like tar. Never leaks. <- Back when it ran Got rid of my chrome one cause it leaked no matter what I did. If it didn't leak at the base it would leak at the hose connection.
I used a silicone type sealer. The thermostat housing is a stock type but we ordered it new. I probably should have checked to see if I warped it somehow the first time I put it on. So I'll check for the surface next time I put it on to make sure it's straight. I'll try one of the permatex sealers you guys recommend.
I have had a ton of problems getting the thermostat to stay in the "pocket", if it falls out it will stop the bottom from sealing. I usually put a small bead of silicone around the outside and put a dab on the edge of the thermostat so it will hold it in place while I put on the outlet.
Run a piece of string or wire through the thermostat and out the front of the neck. Tie the string or wrap the wire around a nail that is sat crossways across the neck. This keeps the thermostat in place while you mount the housing. Once mounted, untie/unwrap it and pull out the string/wire.
I don't use any silicone sealers. Permatex RTV Ultra blue on everything. Silicone sealer is too slipery letting gaskets and parts squish and move out of alignment when you bolt it down. RTV is tackier in this regard and stuff doesn't move around when you tighten bolts. Take the T-Stat housing, stick the T-Stat in place then the gasket with a thin film of RTV over the T-stat to hold it in place, then bolt it on. I apply RTV to both sides of the gasket to also fill in any viods in the mating surfaces.
your t stat housing may be toast, ive seen alot of uneven beatup ones. YOu can order a new one from napa.
