Re: The big coolant disaster. HELP!

Posted by PackardV8 On 2010/11/17 11:31:10

Also from post 3 of this therad from one our more eloquent and knowledgable Packard guru's:

"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."

Note that he indicates WASHERs are used.