Timing gears can cause knocking sound on Buick Skylark

Timing gears may wear causing a mild to severe knocking noise from the front of the engine. Replacement of the timing gears is necessary.
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Average mileage: (–)
Engines affected: 2.3L 4 Cylinder, 2.5L 4 Cylinder
3 model years affected: 1990, 1991, 1992
3 people reported this problem
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1992 Buick Skylark - 2.3L 4 Cylinder
knocks bad