robertbartsch

About 1.5 years ago I did a head and cam job with LT headers. The car ran rich for about two months and then I tuned it with Edit.

I blew a cam sensor recently so I took off the intake manifold. The intake ports are really caked with a thick oil-like sludge - almost tar-like.

I have a LS6 valley cover and a PVC oil catch can and flutter header tube block-off plates and it appears from the catch can that the PVC is not sucking in any crankcase oil into the intake.

Question - where is this oil sludge comming from? If the catch can and Edit tune were done a few months after the initial heads and cam could the rich condition or PVC problem from more than a year ago still result in tar-like intake ports today?


I will clean the ports out the brake cleaner and leave the intake as-is; Is this right? I suppose I could use "GM Top Cleaner" to remove any tar from the intake???

Thanks...

Scalpel

iTrader: (4)

I have the same PCV setup, catch can, etc and have the same thing. Exactly as you describe.

lsx24

iTrader: (45)

Could it be incorrect PVC setup? If you utilize a standard catch can you should be able to catch lots of particles, but that kind of sludge you describe seems to be too much. Just a thought,

robertbartsch

lots of sludge - real thick too.