Cylinder Leak Down Testing
This is Matco's excellent twin-gauge cylinder leakdown tester. The gauge on the left is reference pressure, which Matco says should be between 45 and 150 psi. With the cylinder hose disconnected, turn the regulator knob clockwise until the far right gauge reads zero at approximately the 5 o'clock position. Then screw the cylinder hose into the spark plug hole, connect the hole to the gauge, and read the percentage of leakdown. View Related Article
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