Question about 1998 Jeep Cherokee 4WD

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Knocking noise in engine 1998 jeep cherokee

There is a knocking noise in the motor when the rpm's are up. the oil is fine and there are no leaks that i have seen. what can i do to stop or fix the problem?

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Knocking noise can come from one of three places. Broken flywheel, Worn rod or main bearing. (bearing problems usually are accompanied by lowered oil pressure) An experienced technician can usually tell which is which. If bearing wear is on the rod bearings only and is light, it can usually be corrected. Main bearings require engine removal and is far more expensive. The oil pump should be replaced with either, but is not the cause of the problem. Extreme wear on bearings will also damage crankshaft. If so, it must be replaced.

Posted on Jun 16, 2009

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