Thread: Knock on cold start up

no idea bud, maybe someone else can chime in?

No bigggie, thanks for replying tho im debating parking it, pulling the motor and building it for turbo. I was going to boost it as is but with a week piston or bearing It wont last long at all.

I am almost convinced it is piston slap in #3 cylinder.

Will a bad lifter leak down after sitting and make noise untill it is warmed up?

Also the noise is not as bad if I put warm oil in a cold engine, which means thinner oil makes the noise not as loud.

ANYONE HAVE ANY IDEAS???

Did compression test. Cold motor, Cylinder #1-217psi. Cylinder #3-186psi piston slap in cylinder #3 it is. Bad rings most likely, or worn cylinder. Either way it sucks ass.

Hope my findings may help someone with similar issues.

George