How to determine which wheel bearing is bad - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

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How to determine which wheel bearing is bad

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Old 12-01-2007, 11:22 PM
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Default How to determine which wheel bearing is bad

1993 SSE-SC

Driving a 93 SSE with sonoma_zr2 mileage on the odometer today. I noticed a low pitch humming noise which I could feel and hear in car. It changed noise with pitch.

It looks extremely easy to change, how do I determine which one is bad?
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Old 12-02-2007, 12:04 AM
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get it on jack stands and put it in gear.
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Old 12-02-2007, 01:34 AM
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That won't have the bearing under load, and will tell you nothing.

Put it on jackstands and wobble each wheel in and out, up and down, from 12 and 6 and 3 and 9 o'clock. The bad bearing should be obvious.
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Old 12-02-2007, 01:44 AM
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You can also jack the front wheels off the ground and spin each wheel while holding onto the coil spring. You will feel a grinding in the spring on the side with the bad bearing
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Old 12-02-2007, 07:20 AM
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I would say just pick up a set of bearings anyway, it'* time. There not that hard to replace.
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