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Author Topic: Weird Rear end Noise  (Read 9099 times)

Eurospec

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Weird Rear end Noise
« on: December 05, 2006, 02:13:15 AM »
It's coming from the driver side when making right turns, the faster, the more pronounced the noise becomes. I could also hear it while driving over rough surfaces. Sometimes occurs as Im exiting freeways (declined exit). It is progressively getting worst.

The sound itself resembles something hoping up and down and it's only coming from one side. Rear shock mount were replaced but slight hints of the noise were present before I revamped the rear suspension, including shocks, springs, and bushings.

What could be the cause of this? Perhaps a sign of a bearing on its last feet? Something is obviously loose or about to give way.
« Last Edit: December 05, 2006, 08:01:39 PM by Eurospec »
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m42 fan

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Weird Rear end Noise
« Reply #1 on: December 05, 2006, 06:46:48 AM »
The way you're describing it, it sounds like the wheel bearing.

Brian
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Eurospec

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Weird Rear end Noise
« Reply #2 on: December 05, 2006, 08:03:28 PM »
I've heard it's a major PITA for the DIY'er. Might have a mechanic take care of this. Any particular brand recommendation for the replacements?
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m42 fan

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Weird Rear end Noise
« Reply #3 on: December 05, 2006, 08:10:10 PM »
I've heard the same thing.  I actually passed on a '87 325e because of rear wheel bearing noise on the test drive.  Def. one of my smarter decisions.

Good luck, and let us know what route you take

Brian
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Eurospec

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Weird Rear end Noise
« Reply #4 on: December 06, 2006, 02:14:21 AM »
From the info I have gathered it could be the cv joint going bad. I know my mechanic pointed out these were showing some wear. Any thoughts?
« Last Edit: December 06, 2006, 07:40:07 PM by Eurospec »
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bim bim

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Weird Rear end Noise
« Reply #5 on: December 06, 2006, 08:18:53 PM »
your cv joins will make more of a ticking than a roaring or hoping noise. haha, if it sounds like a "womp, womp, womp" its more than likely a wheel bearing. both of mine are shot and my shit is loud as hell everywhere i go. i work at a garage so ill have the luxury of beeing about to save a bit on the labor and do it myself but i would definatelly suggest just saving a few bucks and letting a garage do it. diy will get you mad and no where unless you can thread a needle with a sledge.
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Eurospec

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Weird Rear end Noise
« Reply #6 on: December 06, 2006, 10:55:25 PM »
No womping. A more accurate descriptor would be rattling. Someone suggested I inspect the rsm.
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dgdavidson

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Here's a write up.
« Reply #7 on: December 08, 2006, 12:28:16 PM »
http://www.teamdfl.com/bmw/e30/rear_wheel_bearings/index.html

Looks simple enough, IF, you have the right tools.
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1991 318is Diamant Schwarz

Eurospec

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Weird Rear end Noise
« Reply #8 on: December 08, 2006, 06:44:41 PM »
Quote from: dgdavidson;15246
http://www.teamdfl.com/bmw/e30/rear_wheel_bearings/index.html

Looks simple enough, IF, you have the right tools.
Thanks for the link.

I'll see if I can troubleshoot what's causing the noise before I begin throwing money out the window and replacing stuff.
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FL318is

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Aha!
« Reply #9 on: December 08, 2006, 06:55:56 PM »
How are those subframe bushings?
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Eurospec

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Weird Rear end Noise
« Reply #10 on: December 08, 2006, 07:08:20 PM »
Quote from: FL318is;15272
How are those subframe bushings?
Replaced a short time ago.
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FL318is

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OK
« Reply #11 on: December 08, 2006, 07:13:11 PM »
RSM, give it a try.  Are there any shift problems?
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Eurospec

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Weird Rear end Noise
« Reply #12 on: December 08, 2006, 07:16:01 PM »
Quote from: FL318is;15276
RSM, give it a try.  Are there any shift problems?
The RSM is definitely something worth checking out. What do you mean by shift problems?
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FL318is

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shift
« Reply #13 on: December 08, 2006, 07:22:32 PM »
When approaching a light in 3rd gear, clutch in, after a full stop it was hard to remove it from 3rd.  After the diff bushing and half axles, the problem went away.  Question.  When you are backing and brake, is there a "clunk" sound?
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Eurospec

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Weird Rear end Noise
« Reply #14 on: December 08, 2006, 07:36:57 PM »
If you mean backing up and engaging the clutch, then yes. There's some play in the driveline :(
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