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Heat. Bearings get discolored when they get too hot. They may have been insufficiently lubricated, or the preload was set improperly (wheel bearings need to have a little bit of preload to distribute the load more evenly).
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∙ 11y ago
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Car vibrating at high speeds?
Tire out of balance, bent wheel, or defective wheel bearing are common causes.Tire out of balance, bent wheel, or defective wheel bearing are common causes.
What causes roaring in front of car - sounds like truck with mud tires?
Possible causes include a bad tire, a failed wheel bearing, a failed transmission bearing, etc.Possible causes include a bad tire, a failed wheel bearing, a failed transmission bearing, etc.
What causes a whistling sound by the front wheel while driving?
Possibly a bad wheel bearing.
What causes a humming noise when I am driving 30 mph?
Wheel bearing.
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Bad tire? Bad wheel bearing? Bent wheel? Bent axle?
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Wheel bearing
What causes a 2003 Honda Accord to have a metal grinding noise on acceleration?
wheel bearing?
What causes loud humming sound on rear of Mercury Cougar?
Bad Tire or wheel bearing, rotate the tires to the front if the noise follows its the tire if remains in rear its the wheel bearing
What causes the front right wheel on make a bumping noise?
Strut, ball joints, roll-bar coupling, wheel bearing
What causes the roaring noise in the front wheel of a 1991 buick park ave?
Sounds like it could be a bad wheel bearing
What causes a rolling sound when you make a turn in your car?
You may have a wheel bearing on it's way out.
What causes a howling noise in the front end of an 1998 s10?
Front wheel bearing(s).
