Oily residue - exhaust manifold

[Mark H.]

Just removed the engine from my '64. 327/300hp. The engine was rebuilt 7 years and maybe 500 miles ago. Took the exhaust manifolds off and found that cylinder #8 has a slightly oily residue where the head meets the manifold. The other 7 are the and have the carbon residue one would expect to see. Any ideas what could cause this? Poorly fit rings? Thanks.

[Doug F.]

Re: Oily residue - exhaust manifold

valve guides or valve guide seals is my guess, as long as it isn't burning a bunch of oil, don't worry about it.