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Fuel and Engines
Pontiac Le Mans
1995-2005 Chevy Cavaliers

How do you determine if you have a rod knock?


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Wiki User
2011-09-13 01:05:12
2011-09-13 01:05:12

Always check your repair monuel before using any tip to see if it will hurt your electrical or ignition system. Increase the rpm until the noise is heard then disable one fuel injector at a time. When the noise quits you have found the cylinder with the problem. If your engine is carb you have to pull one spark plug wire at a time to determine the cylinder. If the noise does not quit the problem is in the top end of the motor or the belt or acces. system. One last hint, cracked automatic flywheels will sound just like a rod bearing.

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did you disassemble the engine to determine the rod condition? some harmonic balancers will make a knocking sound when they go bad

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a lot of times its your timing belt, if its more of a knock its could be a rod knock

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And engine knock is normally caused but I worn crankshaft bearing or rod bearing.

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light slapping knock is a piston knock a loud heavy repetitive knock is a connecting rod Very Bad


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