Question

During a cylinder leakage test using a cylinder leakage tester, the reading exceeds 20%. The least likely place the tech would for leaking air would be:

-tool air hose
-vehicle tailpipe
-radiator filter neck
-PCV valve opening in the rocker arm cover

Answer 1

-PCV valve opening in the rocker arm cover. The least likely place a technician would look for leaking air during a cylinder leakage test using a cylinder leakage tester would be the PCV valve opening in the rocker arm cover.

Step-by-step explanation:

During a cylinder leakage test using a cylinder leakage tester, if the reading exceeds 20%, the least likely place the technician would look for leaking air would be the PCV valve opening in the rocker arm cover. This is because the PCV (Positive Crankcase Ventilation) valve is responsible for venting crankcase gases back into the intake manifold, not the cylinder itself. The other options, such as the tool air hose, vehicle tailpipe, and radiator filter neck, are more likely places where air leakage could occur.