I am considering re-installing my exhaust manifold with NO gasket as was standard from the factory. My head and manifold both look pretty flat using a straight edge. I have been told the gasket helps with imperfections, I have had bad luck using them so far. But I failed to re-tighten it after 100 miles and I think that is super important.
My thinking is one good reason to use a gasket is it keeps the hot manifold from touching the head, as it creates a tiny space a lowing the coolant to keep the exhaust ports on the head cooler than the manifold, thereby extending life of the head and also slightly lowering the heat load on the cooling system.
1. Has anyone installed one with no gasket and what were the results?
2. What are the pros and cons of using a gasket?
My thinking is one good reason to use a gasket is it keeps the hot manifold from touching the head, as it creates a tiny space a lowing the coolant to keep the exhaust ports on the head cooler than the manifold, thereby extending life of the head and also slightly lowering the heat load on the cooling system.
1. Has anyone installed one with no gasket and what were the results?
2. What are the pros and cons of using a gasket?