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Originally Posted by Jackd
You can not check piston rings by only removing the head. You also need to remove the pistons. Raw gasoline can not escape by the valve seals. Gasoline must first go through the valve seats and then exit through the exhaust system.
Possible causes of your problem:
* badly leaking fuel injectors
* Cold start valve always on due to defective temp. sensor or valve.
* Replace your air filter.
* Fuel regulator.
You said "the car runs great" That would indicate (altough not totally) that the rings are just fine and that there is no major bypass at the valve seats.
Check you fuel/vacuum system from a to Z first.
jackD
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Sure you can, poor a liquid of your choice in there and see if it drops in level. Cheesy way of doing it but it will work! Also as suggested a leak down test will tell you a hell of a lot as well. 
Edit: Just a question! How does the fuel get into the oil from a start valve leaking? I would think you would just be getting extra fuel into the intake and thus into the chambers and the car would run worse due to being more rich then normal! Am I wrong in this thinking?
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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.
1986 190E 2.3 Black, Auto, Mods to come soon.....
Last edited by mctwin2kman; 08-17-2004 at 04:36 PM.
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