fragmare

I've got an exhaust joint near my rear axle that needs lubricated a bit. The flanges on that joint are squeaking at idle and at stops. I've got some Super Lithium EP Moly grease out in my garage cabinet that I use for just about everything. I have no idea what the dropping temperature of it is... I'm guessing maybe 400-500F? Will that work for this application, or should I go get different grease?

Former User

Why not just replace the gasket?

fragmare

I plan on it, once I can get the bolts on the thing to break loose. They're out there soaking in Aerokroil right now. I'd like to use a little grease on the flanges then too, to prevent further noise, though.

Former User

I'm pretty sure that once new gaskets are installed, the squeaking will be gone.

fragmare

Yea, probably. I'm guilty of preventative maintenance overkill sometimes, I guess.

Former User

By the way, a squeaking exhaust is sometimes caused by cracks in the exhaust pipe or muffler. You may want to check for that.

fragmare

Yea, I checked that out first. I got under there this morning with the car jacked up and took a look around. The muffler is almost brand new so it's fine. The little pipe between the muffler and large pipe is a little rusty, but not cracked. I'm still just waiting on these flange bolts to bend to my will and come loose. I keep hitting them with penetrating oil every hour or so. I'm getting tempted to ask my neighbor to bring his impact ratchet over.