A wet compression test is performed on an engine after a dry compression test revealed low compression on one cylinder. If the compression on the low cylinder rises, it indicates _____.
A)leaking valves
B)worn rings
C)a worn camshaft lobe
D)a cracked piston

Question

Quizplus · Accepted Answer

When a wet compression test (adding a small amount of oil to the cylinder) results in higher compression compared to a dry test, it typically indicates worn piston rings. The oil temporarily seals the gaps between the worn rings and the cylinder wall, improving compression.

A Wet Compression Test Is Performed on an Engine After