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Chevrolet S10 Timing gears can cause knocking sound

 
Chevrolet S10 Problem
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Model Years Affected: 1990, 1991, 1992, 1993

Engine Affected: 2.5L 4 Cylinder

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Timing gears may wear causing a mild to severe knocking noise from the front of the engine. Replacement of the timing gears is necessary.
  • I have a loud knock sound from the front of the motor. I have a 2.2 lit 4 cylinder. The sound changes pitch when I read the motor up and down

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