Re: The big coolant disaster. HELP!

Posted by Owen_Dyneto On 2010/11/16 18:18:49

Not entirely an uncommon encounter. The fastener shouldn't be a bolt, should be a stud with nut and flat washer. Exhaust manifolds expand at a different rate than the engine block due to the higher temperatures they encounter, so there must be some freedom of movement, hence the attachment with studs, washers and nuts and the oversized (elongated in some cases) holes in the manifold for the fastener. And regardless of how you repair the thread, use shellac or suitable sealant on the stud as they do enter into the cooling jacket, and pay attention to the torque specification.