Mike J

Is that oil ON the piston? They should be very dry....

matt777

I would definitely take a close look at the filters not only for debris but for damage/defects. It seems to me that a defective/damaged hp filter could also cause a reduction in oil flow and pressure.

mongrelcat

+993!!

Vorsicht

Yes, that is oil ON the piston head. Where do we think this is coming from?

JM993

Since your bottom end was solid before you did the top end, I'd speculate that it's a result of something wrong with your valvetrain. Perhaps a valve guide or seal displaced? Do you see this on multiple pistons?

Vorsicht

Yes, I saw this on 5 & 6. Have not looked at other yet.

JM993

Please let us know what you find in 1-4.

I feel for you. At this point, it's probably time to pull it back apart.

Vorsicht

Agreed. I'm in the midst of dropping it right now.

jstyer

Hey Peter,

Good luck with the drop, and these kinds of issues are always so discouraging... But I hope you'll find it sooner rather than later.

Vorsicht

Thank You! You are right, it can be discouraging. When the engine just plain out died my heart sank. However, I am trying to be positive and pro-active. Instead of Engine-From-Hell I'm trying to think CSI-Oakland, 993 edition.

Current Status: Engine out of car, teardown beginning.

axl911

When I rebuilt my 95 993, I had to tear it down again to fix a post build oil leak. You can save yourself some time by not separating the cam housing from the heads. Just lift the cam housing out with the head still attached. Be careful that you don't disturb anything and that loctite 754. This step helps with the re-assembly.

Good luck with the tear down. We're all cheering for you here.

Vorsicht

OK, Good idea! I won't separate unless I have to.

solomonschris

This thread long ago set a personal record for me in that I can't help checking back hoping for good news. The thread also exemplifies just what is so wonderful about RL....all these really smart guys with vast experience willing to share their knowledge and take the time to post.

berni29

Hi Axl

Can i ask you a question please, when you fixed your oil leak did you remove all three heads and the cam tower in one go? If so was it straightforward to get the cylinders back over the pistons?

Many thanks

Berni

Vorsicht

1 - 4 are about the same as the other. A light splattering of oil. Could this be due to the rings not seating?