[s-cars] More Positive Crankcase Pressure 101

[Kaklikian, Gary]

Wow, sounds like your engine was a bit worse off than mine, Dennis. I have no problems, other than above average oil consumption on the street. Oil consumption is only really excessive on the track, and with the crankcase vent connected to the turbo inlet, the dipstick stays seated.  I don't doubt there's a problem with the oil rings,  but compression was good and leak down was under 10% on all cylinders last time I checked it.

-----Original Message-----
From: DGraber460 at aol.com [mailto:DGraber460 at aol.com]
Sent: Tuesday, December 09, 2003 07:47
To: QSHIPQ at aol.com; Kaklikian, Gary; s-car-list at audifans.com
Subject: Re: [s-cars] More Positive Crankcase Pressure 101


I recently swapped a replacement WX into my 83 URQ because the crankcase was pressurizing to the point of blowing out the dipstick, which fits rather tight, and giving the engine bay a nice oil bath. I had checked all the check valves, hoses, and systems (even replaced with other known functioning units), to find everything in working order. Did a compression check and found #2 cyl. at 30lbs. compression. Bingo, I thought this was a standard ring problem. On dissassembly, #2 bore and its rings look just like the rest of them. Valves, stems, seats, and seals all look to be identical and non problematic as well.
Me and 2 other pro mechanics are totally puzzled from the visual inspection. No apparent "smoking gun" as to why. The replacement WX is running fine with all the same CCV equipment. A machine shop inspection might find a ptoblem with #2, but visually it sure doesn't look like a severe enough problem to account for 30lb. compression.
I'm interested in what you find in the end.
FWIW- I am running 18-19 lbs. (gauge) boost.    

Dennis
Denver