Advertisement
Another test to perform is a Cylinder leakage test.
When performing a cylinder leakage test, a defined
amount of air is pumped into the cylinder.
My measuring how much pressure can be created in the
cylinder, the amount of leakage can also be determined.
Think of this as Air in vs. Air out indicates leakage in the
cylinder.
Identifies cylinder which has the problem.
Also will provide information on where the problem is.
Air leaking out of the exhaust indicates a leaking exhaust
valve.
Air leaking from the air filter indicates a leaking intake
valve.
Air leaking from the crankcase indicates leaking
compression rings or head gasket.
NOTE: There will always be air leaking for the crankcase.
If this is the gauge shows excessive leakage and the only
place you hear air escaping is from the crankcase, then
the excessive leakage is past the rings.
When an engine displays compression reading that are
not within the normal specs, there are several areas to
inspect.
Advertisement
