...I need some help, badly - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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#1 (permalink) Old 06-10-2009, 07:54 PM
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...I need some help, badly

So, my E39 has reached that special time where age/mileage makes things wear out/break. I'm pretty mechanically inclined and I can't figure this one out.

About a month ago, I started to hear this strange bumping sound in the front. What makes this even more odd is the sound dissapeared for awhile and has recently come back (I knew this was likely to happen).

I'm under the idea that I'm probably going to have to replace the upper and lower control arms as I occasionally feel a tad bit of play through the steering wheel.

If anyone else has experience this problem with a bumping sound, let me know what it was. I want to make sure I know what it is before I go and do the work.

Some additional information:
The car is 9 years old and has 81K miles.

Thanks for any help in advance. I appreciate any input and I'm sure this is a common problem.

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#2 (permalink) Old 06-10-2009, 08:12 PM
OMFG another one!?
 
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My first guess is lower control arm bushings.

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#3 (permalink) Old 06-10-2009, 08:34 PM
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My first guess is lower control arm bushings.
Thanks whiteshark. I was thinking the same thing because I've seen a lot of threads regarding LCA failures. Either way, I still think I'll do both the upper and lowers while I'm in there.

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#4 (permalink) Old 06-12-2009, 03:30 PM
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In my case changing the control arms has not solved the noise problem fully but has improved the situation. I am still hearing some noise with sort of play in the steering wheel especially on a rough road. But my car has 342,000 Km.

You have nice looking car with nice rims.

keep us updated on your progress.
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#5 (permalink) Old 06-12-2009, 03:49 PM
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Bumping sound on my old e34 turned out to be passenger side shock with no oil left in it,yes hard to believe but the handling apart from excess roll in corners was still good.I ended up replacing all round and found drivers side was not to clever as well.Still shocks me to this day that out of all the cars I have ever owned none would still drive and handle as good with suspension in that state.It already had new thrust and lower arms fitted so I expected the bump to be anti roll bar !!.It would make the bump noise the most when the suspension was full height and lets say 'unloaded' the first part of its travel made the sound,often accompanied by a feeling on rippled type roads that the wheels seemed to be wobbling as if all the wheel bolts were loose
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#6 (permalink) Old 06-12-2009, 04:26 PM
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Try the inner and outer tierod ends or strut caps

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#7 (permalink) Old 06-12-2009, 08:39 PM
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Bumping sound on my old e34 turned out to be passenger side shock with no oil left in it,yes hard to believe but the handling apart from excess roll in corners was still good.I ended up replacing all round and found drivers side was not to clever as well.Still shocks me to this day that out of all the cars I have ever owned none would still drive and handle as good with suspension in that state.It already had new thrust and lower arms fitted so I expected the bump to be anti roll bar !!.It would make the bump noise the most when the suspension was full height and lets say 'unloaded' the first part of its travel made the sound,often accompanied by a feeling on rippled type roads that the wheels seemed to be wobbling as if all the wheel bolts were loose
I replaced my shocks last year with Bilstein sports, so I know that is not the problem. Thanks for the info though.
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#8 (permalink) Old 06-12-2009, 08:41 PM
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Try the inner and outer tierod ends or strut caps
Maybe, I'm going to replace my LCA's and UCA's first and see if it goes away.
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#9 (permalink) Old 06-18-2009, 03:14 PM
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#10 (permalink) Old 06-18-2009, 04:47 PM
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And did you do new strut caps when you intalled the billies? I would look into powerflex poly bushings btw

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#11 (permalink) Old 06-18-2009, 05:59 PM
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And did you do new strut caps when you intalled the billies? I would look into powerflex poly bushings btw
Powerflex doesn't make a whole lot for the E39. I'm going to add BavAuto heavy duty strut bearings. I replaced my control arms and it reduced the thumping sound. Now I know it's coming from the shock towers. No, I did not have them replaced and I knew I should have.
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#12 (permalink) Old 06-19-2009, 03:19 AM
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yeah if you have it that far abart just replace them there cheap... powerflex makes control arm(thrust arm) bushings and Rear bushings

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#13 (permalink) Old 06-19-2009, 09:00 AM
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yeah if you have it that far abart just replace them there cheap... powerflex makes control arm(thrust arm) bushings and Rear bushings
I've learned that lesson, but the only good thing here is that the front suspension isn't that hard to take apart or put back together.
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#14 (permalink) Old 06-21-2009, 09:35 PM
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So I found the problem. It ended up being my front right strut which apparently had a real nasty defect. The replacement Bilstein is on the way and I'll post additional info when I get it.
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#15 (permalink) Old 06-21-2009, 10:18 PM
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Glad you found it!

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