more problems

[jet1]

been noticeing a pretty loud tapping noise coming from valvetrain when car is cold. once it warms up it dissapears. Took valve cover of and found no visual clues. I do have a roller cam. all rollers and cam look fine. However I do know I have a partial blown hg.(slight oil residue in overflow) with a act code can this be related?

[Stinger]

First step to diagnosing any problem: Fix any KNOWN problems.

Also, running with a blown headgasket can quickly ruin the engine block by eroding a hole where the combustion gasses are escaping. I'd suggest you fix it ASAP if you don't want to be looking for a new engine.