Mechanics

3000 GT KNOCKING NOISE COMING FROM THE ENGINE

1999 Mitsubishi 3000GT • 6 cylinder 2WD Automatic • 103,200 miles

1999 Mitsubishi 3000 GT mileage: 103,200. I hear a knocking noise coming from the engine. I can hear it sometimes at idle but mostly when the engine is revved to 2000 to 3000 RPM. The sound seems to go away if I unplug the spark plug to the number 5 cylinder. Any suggestions on what it could be?
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2CarPros-Archives
November 10, 2010.




From the tests that you have described, it could indicate a possible broken piston or broken ring, or a failing wrist pin or rod bearing on the number 5 cylinder.

Tiny
2CarPros-Archives
Nov 10, 2010.


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