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Old 09-17-2008   #4
Shane@DBPerformance
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Join Date: Oct 2003
Location: On the dyno
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Re: Smoking under Deceleration Please Help!

Oil could be coming from the rings, valve seals, turbo, PCV system or could be old oil stuck in the intercooler, i/c piping, or exhaust system.

30% leakdown is not acceptable, maybe for a stock non-performance car that is just driven normally, but not for a performance car. Anything above around 5% is possibly a problem somewhere. I have had cars with bent valves that needed to be replaced give leakdown results of 15-20%.

On the 2 cylinders that were 15% leakdown, where was it leaking to? Valves or rings?
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