dannysf

Hope to get your guys' opinions, please share a moment of your time if you're knowledgable on this subject. I'm looking at a 06 C4S tip, 62K on the clock with all service done at Porsche. Car had compression/leakdown test with following results:

Cyl 1 - 218psi / 15% leakdown
Cyl 2 - 220psi / 12% leakdown
Cyl 1 - 215psi / 14% leakdown
Cyl 1 - 219psi / 11% leakdown
Cyl 1 - 220psi / 14% leakdown
Cyl 1 - 213psi / 19% leakdown

Leakdown numbers look very high to me, but I'm no expert. Perhaps its beause the car has been sitting and its winter. Porsche dealer is saying those numbers aren't abnormal for a car of this age and that everything "checked out great". They scoped the cylinders as well. Please share your thoughts.

Quadcammer

compression is good.

the leakdown is rubbish, but I'm guessing they just screwed up the test.

captainbaker

Optimally you would want your PSI to be consistant across the board, which they are. If Cyl 1 was say 150Psi....that would be an issue.