DavisZR1
02-08-2006, 08:33 AM
I read this some were.
Car Burps Engine Oil Through the Air Filter
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No, I haven't had too much to drink. I was at Spring Mountain last weekend, and at the end of the last session on Saturday I noticed a puddle of oil under the nose on the driver side. I popped the hood and found lots of oil around the area where the intake and outlet lines enter the oil cooler. Not surprisingly, I assumed there was a leak in the intake fitting, or something else funky with the oil cooler. I cut the weekend short and returned to L.A. on Sunday (300+ miles at average 80mph on highways). There was no additional oil leakage, so I assumed it was a high pressure - high temp leak.
I left the car at the dealer this afternoon, and got a call at 8:30 this evening (they run two shifts in the service department). The diagnosis after mucho consultations with the GM service guys: if the oil pressure gets high (hot engine, high sustained rpm) the system will "vent" some oil into the air intake system, and it can exit through the air filter and end up just where I described above. The shop foreman at the dealer was incredulous, but the GM guys convinced him that this was how the system was designed to work on the Z06.
OK, I'm just reporting what I was told, and I'll see what else is on the report when I pick up the car tomorrow morning. I'm interested if anyone else who runs their Z hard (like at the track) has noticed any oil puddles on the driver side or oil moisture near the air filter inlet.
Damn, I just should have run it on Sunday like I was planning to . . .
Car Burps Engine Oil Through the Air Filter
--------------------------------------------------------------------------------
No, I haven't had too much to drink. I was at Spring Mountain last weekend, and at the end of the last session on Saturday I noticed a puddle of oil under the nose on the driver side. I popped the hood and found lots of oil around the area where the intake and outlet lines enter the oil cooler. Not surprisingly, I assumed there was a leak in the intake fitting, or something else funky with the oil cooler. I cut the weekend short and returned to L.A. on Sunday (300+ miles at average 80mph on highways). There was no additional oil leakage, so I assumed it was a high pressure - high temp leak.
I left the car at the dealer this afternoon, and got a call at 8:30 this evening (they run two shifts in the service department). The diagnosis after mucho consultations with the GM service guys: if the oil pressure gets high (hot engine, high sustained rpm) the system will "vent" some oil into the air intake system, and it can exit through the air filter and end up just where I described above. The shop foreman at the dealer was incredulous, but the GM guys convinced him that this was how the system was designed to work on the Z06.
OK, I'm just reporting what I was told, and I'll see what else is on the report when I pick up the car tomorrow morning. I'm interested if anyone else who runs their Z hard (like at the track) has noticed any oil puddles on the driver side or oil moisture near the air filter inlet.
Damn, I just should have run it on Sunday like I was planning to . . .