E46 325 loose rear wheel bearing, badly fitted or faulty part?
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  1. #1
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    loose rear wheel bearing, badly fitted or faulty part?

    had a rear wheel bearing changed on the bmw at the start of the year as it failed the mot for 'excessive play'. we were doing the rear discs/pads/handbrake yesterday, as when we came to the drivers rear, which had the new wheel bearing, we noticed that the wheel would wobble, when you grip the wheel top to bottom, and left and right.

    after taking the wheel off it appears that everything is solid apart from the bit that fits inside the wheel bearing.

    not sure if this is cause or effect, but i also noticed that every bolt that holds the driveshaft to the bearing was loose, they hadn't been thread locked when refitting (not sure if they were supposed to be or not?).

    what i want to know is, have these bolts worked loose over the last 4k miles, and therefore given the wheel bearing too much play and damaged it, or could a faulty wheel bearing cause excessive play in the driveshaft and there for work the bolts loose to the diff?

    so to cut a long story short, i know faulty wheel bearings can make a droning noise, but there was none of that, but can they colapse inside given too much play to the parts fitted inside it?

    well bloody dodgy either way, glad we noticed it when we did, dont fancy the rear wheel overtaking us down the motorway

  2. #2
    Worn out....
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    Is it the main nut that holds the shaft into the bearing? It should be one use only and the end needs to be knocked over into the cutout in the shaft to stop it coming undone.

  3. #3
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    no not that, its tight to the shaft, but the shaft, nut, brake disc, handbrake housing all move as one, its as if everything connected to the inner part of the wheel bearing can move, from what i could gather, everything is tight, i am pretty sure the bearing is tight to the arm, but everything connected to the inner part of the bearing has movement
    Last edited by bmw325coupe; 19-08-2012 at 17:45.

  4. #4
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    Check the top rose joint where the spring carrier attaches to the top of the hub. When these wear the whole hub ends up with play which can be mistaken for bearing play.

  5. #5
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    Get someone to step on the foor brake and test again with it applied.
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