air loss. Aloud hissing of air at the carburetor indicates
a leaking intake valve, or valves. Excessive hissing of
air at the oil filler tube (crankcase) indicates an
excessive air leak past the piston rings. Bubbles
observed in the coolant at the radiator indicates a
leaking head gasket
As in vacuum testing, indications are not
conclusive. For instance, a leaking head gasket may
prove to be a cracked head, or bad rings may be a scored
cylinder wall. The important thing is that the source of
the trouble has been pinpointed to a specific area, and a
fairly broad, accurate estimate of repairs or adjustments
required can be made without dismantling the engine.
Overhead valves are adjusted with the engine in
what condition ?
When you perform a wet compression test and
the reading goes up, what is the most likely
You make a vacuum gauge test at sea level with
the engine idling at 550 rpm, and you get a
reading of 10 inches. What is the most probable
When performing a cylinder leakage test, you
notice a loud hissing of air from the carburetor.
This is an indication of what type of problem?