1984 Camaro Z28 Leakdown Test - Pressure Points
As we mentioned, a leakdown tester can help pinpoint problem areas in an engine. The key is to identify the exit path the pressurized air is taking. A few possible escape routes are shown here (arrows). Air passing through the oil fill hole or crankcase breather tube points toward worn rings as the culprit. If you hear it through the carburetor, there's probably a less-than-perfect seal at the intake valve.
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