One of the first symptoms of a problem with an exhaust manifold gasket is an excessively noisy engine. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. The sound may be especially pronounced during a cold start or during acceleration.
How do I check my exhaust manifold gasket leak?
What will a leaking exhaust manifold do?
A leaking exhaust manifold will almost always create a ticking or tapping noise. Often, the sound is more pronounced upon startup when the engine and the manifold are both cold. The noise may diminish or disappear once the engine warms up and the manifold expands, closing off the leak.
How do you pinpoint an exhaust manifold leak?
Related Question How do I know if my exhaust manifold gasket is leaking?
How do you stop an exhaust manifold from leaking?
Will a bad intake gasket cause rough idle?
Generally a really bad intake manifold gasket will make a car run rough at idle and/or cause a service engine light to illuminate. If your engine stops turning then you will stall, although there could be other reasons for a stalling engine, faulty intake gaskets will be one of the problems.