944T Engine Expert

[tchudy]

Looking for someone in the Chicago area that knows the 944T engine very well. I just completed a rebuild and have an issue I am concerned about...slight lifter tapping. I've read tons of info on the subject but I want someone to have a listen and advise. Willing to pay for a service call just for advice. Can trailer the car if I have to.

I am located in Channahon, IL, just off of I55.

Thanks...Tom

[nun101]

Oil pressure normal? Pressure relief alligned properly?

[commdiver]

I would use a oil treatment called sea foam. Just buy a pint pour in engine and drive normal for 100 miles. And by normal I mean Porsche normal rev it to redline here and there, drive it on some twisters a real road test.....
The ticking should go away as it sounds like several instances I have had after having a cam tower off a lifters sitting for a long time then rebuild motor goes back together and the ticking just seems like 1 or 2 lifters won't go away until I get it real hot and flog the engine awhile.

[tchudy]

Yes, oil pressure normal, updated OPRV aligned on install. Lifters were very slightly used (like a couple hundred miles). I soaked in Marvel Mystery Oil for a couple of months and then pumped them up before install. They seemed okay, but I have no previous experience with these lifters. Sounds like just one of them tapping.

[grendiers]

Could be an exhaust leak. Had a suspected lifter noise on our '88 924S SE, and turned out to be an exhaust leak out the manifold on the #4. Check your nuts!!

[tchudy]

Definitely not an exhaust leak making the noise...not to say that I don't have one...I think there is a small one south of the header I'll need to check out.