Question about 1997 Buick Skylark

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When car is running, light noise in motor. sounds like a rod bearing. What kind of mechanics do I need to do to it?

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You need highly skilled and experienced technicians to both identify and repair this problem. (but only ones with yellow hats...only kidding!) You can differentiate between a rod bearing and a lifter problem by increasing rpm's from idle. Generally a lifter noise will go away, a rod noise will get louder. Rod or main bearings also lower oil pressure when they wear. It takes lots of experience to tell the difference between a rod or main noise but generally with today's crankshaft construction, neither are repairable using anything but a new crank, unless wear is extremely slight.A rod bearing can be replaced in-car. A main cannot.
Both jobs are expensive.

Posted on Jun 16, 2009

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