knocking sound in engine


Asked by Mar 14, 2016 at 09:19 PM about the 1999 Acura TL 3.2 Sedan

Question type: Maintenance & Repair

What causes a knocking noise in the engine
when cranked and accelerating?

2 Answers


Thrown rod, carbon build up on top of a piston, broken rocker arm, you need to track it down, if it is a rod don't drive it or you will totally ruin the engine.

1 out of 1 people think this is helpful.

You can also have low oil/oil pressure.

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