|
|
|
|
| Author |
|
|
Forced Induction Junkie
|
C2 Cylinders/Head Seepage
Do any of you remember the problems with some of the C2 cylinders/heads seeping oil? I know there were only a small percentage of engines with the problem but I was wondering if any of you recall how it happened. Was the the heads, the cylinders?
__________________
Dave '85 930 Factory Special Wishes Flachbau Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P |
||
05-14-2008, 05:39 AM
|
|
|
resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
|
The only thing I can remember was that (I *THINK*) a special gasket/o-ring needed to be used with the cylinders.
__________________
-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP  )
Last edited by sand_man; 05-14-2008 at 06:18 AM.. |
||
|
05-14-2008, 06:15 AM
|
|
|
MBruns for President
|
Heads to cylinders - Porsche bulliten states that if the area is wet to the touch - they need to be addressed.
The solution is new P & C's - although I think that Ollies is now machining in a later sealing groove.  
__________________
Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
||
|
05-14-2008, 07:01 AM
|
|
|
Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
|
Quote:
Dave, The leakage was due to lack of sealing rings between the heads and cylinders. Late, replacement cylinders had a groove for a gasket and the heads can be machined to suit. We've had really good luck machining those early heads for a sealing ring and them modifying the tops of the existing cylinders to fit. After 20+ sets over the past 6-7 years, nary a leak. 
__________________
Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
||
|
05-14-2008, 09:51 AM
|
|
|
Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,002
|
I had one of those sets Steve speaks of, working great!
Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
||
|
05-14-2008, 09:59 AM
|
|
|
Registered
Join Date: Mar 2004
Location: So. Ca.
Posts: 521
|
Quote:
I respect that kind of ingenuity. Once again if you don't mind a picture would be cool. |
||
|
05-15-2008, 07:14 AM
|
|
|
|
Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
|
Quote:
Works great.
__________________
Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
||
|
05-15-2008, 07:26 AM
|
|
|
Registered
|
I run a set of "early" C2 barrels machined by Walt from Competition Engineering. They were a warrantly replacement. He machined a step into the top sealing surface and I put a fire-ring in from the Turbo. The engine is leak-free for 20.000 miles now and I am very happy with that. Mine were leaking a lot before and were unsalvageable. They went out of round.
Ingo
__________________
1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430 I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!! How about a NoBadDays DualChip for 964 or '95 993 |
||
|
05-16-2008, 01:08 PM
|
|
1985 Porsche 930 Fac. Slantnose 3.3l
Gone to California
Turbo
1974 Porsche 911 Targa 3.6
