No, You don't put anything on Head, Exahust or intake gaskets. CJ
actually you do put a 1/8'th inch bead of black silicone on the gasket to ensure no leaks occur and it also helps hold the gasket in place when your putting the intake manifold on. I'm a Ford master technician, you ALWAYS use silicone when replacing intake and head gaskets.
In most cases a new gasket is required, but no sealant.
You need the sealant on the ends where the supplied gaskets don't cover fully.
what is the general cost for sealant replacing in expansion joints
Not that I've heard of. Replacing the gaskets and inspecting the manifold for warping or cracks is the best way to stop intake vacuum leaks.
There should be a stud (not a bolt) threaded in to the head and the stud should have a thread sealant applied to the threads.
Yes, wherever there is a joint between 2 pipes, use exhaust sealant to prevent a bad seal between the pipes, which will prevent it blowing.
From experience I would say yes
when replacing a frost plug u can use a sealant but only use silicone u dont realy need it and yes u have to clean the area good
Yes. You should use a high temperature silicon sealant.
On the 3.1 LS model, the thermostat is in the intake manifold, just underneath the air intake, and between the exhaust crossover and the manifold. Trace the upper radiator hose back to a metal pipe from the engine, that is the thermostat housing. Replacing it means using a ratcheting box-end (10mm?) or open end wrench to start and finish, and fingertips for the rest, so NOT when the engine is hot! The thermostat fits horizontally into the manifold, and comes with its own molded gasket, which fits into a recess, and doesn't require gasket sealant. I just changed mine, so good luck.
Possibly. Only add sealant if it is called for by the manufacture.
no, but you can replace the gasket entirely add the sealant ensuring a leak free fit.