Subjects>Auto>American Cars

Pontiac grand am and it is knocking at the back of the motor what could be wrong?

Anonymous

∙ 17y ago

Updated: 10/23/2022

Internal knocking inside the engine is almost always a sign of worn bearings. Crankshsft, or rod bearing would be my guess. The fix, if it is internal, is overhaul. Before opening it up, make sure the knocking is indeed coming from inside the engine.

Wiki User

∙ 17y ago

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