Problem Reports » Timing gears can cause knocking sound

Problem Reports

GMC S15

 

Report: Timing gears can cause knocking sound

GMC S15 Problem
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Model Year Affected: 1990

Engine Affected: 2.5L 4 Cylinder

Verified

Timing gears may wear causing a mild to severe knocking noise from the front of the engine. Replacement of the timing gears is necessary.