03 996 4S compression test results
Thread Starter
Racer
Joined: Aug 2011
Posts: 283
Likes: 0
03 996 4S compression test results
Just had the test completed and got readings of 235/235/232/235/235/235. Test was performed by an ex-Porsche main dealer lead mechanic who now owns his own business.
Have searched the forum but couldn't find any "spec" numbers to compare my results against. Car has done just over 101k miles and runs great, having just had all the coils replaced.
Anyone any data on what is regarded as excellent vs not so?
Have searched the forum but couldn't find any "spec" numbers to compare my results against. Car has done just over 101k miles and runs great, having just had all the coils replaced.
Anyone any data on what is regarded as excellent vs not so?
Rennlist Member
Joined: Nov 2013
Posts: 931
Likes: 106
From: cincinnati
As others have said, its more about the values relative to one another. Lots of things can impact the actual compression reading, such as the condition of your battery and how fast the engine cranks during the test. You're really just looking to make sure they are all pretty much the same - and in this case I don't think you could ask for much better than the results you got.
Just curious - what prompted you to have a test done?
Just curious - what prompted you to have a test done?
Thread Starter
Racer
Joined: Aug 2011
Posts: 283
Likes: 0
As others have said, its more about the values relative to one another. Lots of things can impact the actual compression reading, such as the condition of your battery and how fast the engine cranks during the test. You're really just looking to make sure they are all pretty much the same - and in this case I don't think you could ask for much better than the results you got.
Just curious - what prompted you to have a test done?
Just curious - what prompted you to have a test done?
So, if I'm so paranoid about the motor in this car, why have I still got it after 7 years???........it's because it's such a damned nice car and probably the best bang for the Porsche buck on the face of the planet!! I've gone back and forward with keeping or selling and so far, keeping has won out. I've done just about everything that has been suggested that is most likely to give problems with the car, other than "the solution" although I do have the ceramic bearing in there. So, there you have it.
And just out of interest, and perhaps some of you folks have seen the same thing.......I got an email from the Porsche main dealer around the middle of last year telling me that Porsche now consider anything over ten years old as "classic" so if I wanted to sell it they'd be happy to do that for me, for a fee of course.......hmmmm.....:-)
