1984 Camaro Z28 Leakdown Test - Pressure Points
For comparison's sake, we also ran a standard cold-cranking compression test on our 305, registering 140-150 psi on all but cylinder 7, which came in at only 130 psi. Well within 10 percent of the other cylinders, it's not a bad number. We mention it to highlight the fact that the two measure different things-this cylinder doesn't create as much pressure as the others, but it also leaks less than the others. Both pieces of info are valuable in determining an engine's condition
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