2003 ford focus 2.3l, 5 speed manual with about 146k on it. I pulled the head after the misfire was diagnosed as a blown head gasket, which it was not and found an exhaust valve cracked. I replaced it, all seals and gaskets and when I fired it up it still has the misfire and oil on top of the #3 piston. I will do a compression test but want to know what it could be IE valve guides, rings, something else?
Where can I put more pictures to include a timeline of symptoms?