E36 323 Another problem! Rear Rotational Noise?
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  1. #1
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    Another problem! Rear Rotational Noise?

    Hi guys,

    Thanks for all the suggestions/help with the last car problem..... now onto the next!


    Got a rotational noise. From where im sitting it sounds like its from the rear and does seem to get louder when I have the rear seats folded down. I would say it sounds like a typical rotational bearing like noise. It increases with speed and stays present whether the car is in gear or in neutral, foot on clutch, foot off clutch, whatever, always there. It appeared about 4 days ago and is getting worse.

    I have swapped the tyres round on the passenger side because I thought it sound like it was coming from that side but it didnt make any difference (thought it might be a tyre problem).

    When cornering it doesnt seem to get any worse/better.

    Looking at the diff from beneath the car there is a slight weep from the drain plug.

    My guess is its either a diff bearing, the diff is low on oil or its a wheel bearing but I would have thought it would have got louder upon going round a corner and loading up the dodgy wheel bearing.

    Any advice, any other ideas? Im going to try and change the diff oil tomorrow night.

    Only other thing worth mentioning (and it may just be coincidence) is that I had my 4 wheel alignment on saturday and it seems to have started since then.

    CHEERS!

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    see if ya can narrow it down to a centre noise or a single sided noise..

    ive put mine on axle stands and ran it in 2nd gear before now with the DSC disabled (dash fault lights goes beserk if ya dont) its easier to check for iffy bearings but if its a load induced noise it prolly wont show up but ya never know...

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    Tried gently pulling the handbrake to rule that out? Dust guards rubbing on the disc maybe too?

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    Quote Originally Posted by Seismic22 View Post
    When cornering it doesnt seem to get any worse/better.
    If turning left makes it louder and turning right makes it quieter, right wheel bearing.


    If turning right makes it louder and turning left makes it quieter, left wheel bearing.
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    Quote Originally Posted by Disco Stu View Post
    Tried gently pulling the handbrake to rule that out? Dust guards rubbing on the disc maybe too?
    I was thinking about this....

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    I got the same problem to!

    Quote Originally Posted by Disco Stu View Post
    Tried gently pulling the handbrake to rule that out? Dust guards rubbing on the disc maybe too?
    Would a sticky handbrake make that sound?

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    Quote Originally Posted by DerekJr. View Post
    I got the same problem to!



    Would a sticky handbrake make that sound?
    Try pulling the handbrake whilst moving (slowly). If the noise stops or changes then it could be the shoes. The part that the cable goes into can seize up, so when you take the hand brake off it doesn't take it off fully. The backplates are easy. take a wheel off and spin the hub, see if you can hear any rubbing. If you can, try bending the backplates slightly where the noise is until it makes no more noise! This can take ages as you'll bend it and it'll start touching somewhere else. Keep at it....

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    Hi Guys,

    Its definitely the bearing, jacked the rear up, stuck it in 5th and let it run on tick over and you can hear it quite clearly. Inline with what you guys are saying though, on top of the N/S/R bearing it does sound like either the rear pads are dragging or the back plates are rubbing slightly. Was a bit low on time but I might jack her up again and have a look again.

    Im not doing the bearing due to time constraints, its my daily and I dont have a puller. Rung around and garages are coming back saying its going to be about 180 all in, christ 180 just for a bloody bearing!

    Cheers

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    Re: Another problem! Rear Rotational Noise?

    Sounds about right.my offside rear bearing cost 220 in the end to do as it was so bad it broke their tooling

  10. #10
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    I don't have a puller, mine cost me 20!!

    To be fair it was a bitch though..

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