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I had an oil change on the P!G (M1 synthetic) before a trip and that's when the trouble started...
The driver side wheel well makes a gentle creaking sound at idle RPM, which seems to disappear at higher RPM. It sounded like a small frog quietly chirping in the wheel well and I was worried it was a turbo. When we popped the hood, there was sound of a vacuum near the intake. The PCV to crankase hose (part #5) collapses while the engine is running and the oil fill port sucks strong vacuum if the fill cap is removed.
My local independent mechanic (I'm some distance from a Porsche specialist) found that hose 14 and 15 are both cracked and identified their failure as causing the sound. Cause of failure is presumed age/heat. Since replacing those two components are $370-400 in hoses, is there something else we should be looking into as a cause of these pipe failures? Searching the forums I came upon a discussion that makes me think maybe we should be looking at the PCV valve, air oil separator membrane, and the diverter valves? I'm wrench-familiar with NA cars and new to turbos so I'd appreciate your input. Is the restricted airflow or vacuum interruption causing turbo noise? Has anyone else seen this and what else should I be checking?
We do see the boost gauge work normally or at least what it has historically (under acceleration it hits 0.8 bar/pegged and then holds near 0.6-0.7) before these issues started. The rest of the car seems to work well, aside from the a sticky secondary air injection check valve on the passenger side.
Hoses 94810721753 and 94810721651 are cracked
2005 Cayenne V8 Twin Turbo
1085 944 early
2002 C2 manual:
Problem: when parked outside in freezing temperatures, oil leaks from the lower oil pump connector, item 7 in diagram below. When parked in a warm environment, it remains dry.
Anyone had that problem? Should I replace the gasket #8?
M96.01/02/03 Oil Pump M96.04
Does anyone have or know where I may have the bolt torque specs for a 2008 Cayenne Turbo? I need pretty much the specifications for all the bolts and nuts that would be included in a block replacement. I'm getting the back rebuilt by 928 Motorsports and reinstalling with an experienced friend. However, it's nearly impossible to find the specs for these motors. Additionally, if there's a place where I could find a complete 957 workshop manual, could someone please advise? Thank you.
Just wanted to say thanks to the community helped answer some questions about the scoring on my 2008 CTT 957. My next question is, does anyone know where I may purchase a complete engine seals and gasket kit for a 2008 Cayenne Turbo? Or if these are unavailable as a whole unit, had anyone rebuilt their engine from the cylinder scoring or something similar and have a parts list of required seals and gaskets which need changed? Additionally, are there any other suggestions on parts that I should change some I'll have the motor apart? Anything would help at this point. Thanks
Transitioning from previous thread to new one-- Replaced the water pump and performed the 60,000 mile service in my 04 Turbo Cab. Car runs great except now I am getting overboost to 1.0-1.3 bar. I don't hold it there to be sure. That said, I realize it is likely a vacuum issue but the only lines I touched during the repair are the one from the Y-Pipe to the switch and the one from the switch to the plastic line that goes to the driver side of the engine. Flashlight and inspection mirror show the 3rd line on the underside of the switch to be connected. Any thoughts on where else to look?