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1990C4S 1990C4S is offline
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Join Date: Sep 2009
Location: North of You
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That helps seat valves when you are driving, that might explain how the drives well despite a poor leakdown result.

But a compression test is only 150 psi, and a leak down should be about 100 psi, so the disparity in the results is unlikely. You are being told the cylinder seals well enough to create 150 psi, yet the leakage is huge.

The only explanation I can see is that his air supply was limited on the leakdown.
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Old 12-09-2015, 05:11 AM
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