1984 Camaro Z28 Leakdown Test - Pressure Points
The tester told the tale for this cylinder: 45 percent leakdown, which the Proform unit classifies as moderate. It wasn't as good as we hoped for, or as bad as we feared, but while testing this cylinder, we could actually hear the air escaping through the crankcase breather tube, which meant it was getting past the rings. Given that this engine has new heads but its original lower end, it makes sense.
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