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  #1  
Old 11-09-2018, 09:53 AM
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Clunking sound when I hit a bump

HI

Whenever I hit a little pothole on road, i get some loud clunk on right side of car, not sure if its front or back or both. Could it be shocks or something else I should be looking for? My car just reached 100K miles, X5 4.8 2009.
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  #2  
Old 11-09-2018, 10:40 AM
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Quote:
Originally Posted by ralphy4321 View Post
HI

Whenever I hit a little pothole on road, i get some loud clunk on right side of car, not sure if its front or back or both. Could it be shocks or something else I should be looking for? My car just reached 100K miles, X5 4.8 2009.
This is the main symptom of a very common failure. The clunk is almost certainly the result of the failure of the orange cushions (aka Guide supports) on one or both of the front shock struts. You can check this by opening the hood and looking at the top of the struts for an orange powder.

FWIW I spent a lot of time diagnosing a similar clunk that I thought came from behind the driver. But eventually I looked under the hood and found the real culprit. Here are links to two threads with the gory details.

https://xoutpost.com/bmw-sav-forums/...unk-trunk.html

https://xoutpost.com/bmw-sav-forums/...build-diy.html

Funf Dreisig
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  #3  
Old 11-14-2018, 10:08 PM
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Quote:
Originally Posted by FunfDreisig View Post
This is the main symptom of a very common failure. The clunk is almost certainly the result of the failure of the orange cushions (aka Guide supports) on one or both of the front shock struts. You can check this by opening the hood and looking at the top of the struts for an orange powder.

FWIW I spent a lot of time diagnosing a similar clunk that I thought came from behind the driver. But eventually I looked under the hood and found the real culprit. Here are links to two threads with the gory details.

https://xoutpost.com/bmw-sav-forums/...unk-trunk.html

https://xoutpost.com/bmw-sav-forums/...build-diy.html

Funf Dreisig
Thank You
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  #4  
Old 11-14-2018, 10:32 PM
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So I was told is the front lower control arm, is there any difference between OEM and other brand? Seems like OEM is double the price


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  #5  
Old 11-15-2018, 01:35 AM
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just a thought but last time i did my whole front end replacement with the cheapest parts for my e36 i started to rattle again within a year and a half. replaced it with oem its been 5 years since its still nice and stiff.
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Old 11-15-2018, 10:21 AM
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Originally Posted by 2011x5 View Post
just a thought but last time i did my whole front end replacement with the cheapest parts for my e36 i started to rattle again within a year and a half. replaced it with oem its been 5 years since its still nice and stiff.

Thanks for the heads up
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Old 11-15-2018, 11:20 AM
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In most repairs the labor exceeds the cost of the parts. I’m usually saving quite a bit by doing my own labor. So I don’t chince on the parts. I look for a good price on OEM parts. Often I can match the OEM, that BMW uses for that part, at roughly half the cost of BMW’s part.

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  #8  
Old 11-15-2018, 11:56 AM
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Yeah my money would be on tension arms. I just put a set of Febi on, I expect them to last 40K miles. Be sure to replace the one-time-use fasteners. The torque spec is important to achieve proper bolt stretch. Found in TIS.
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  #9  
Old 11-28-2018, 03:42 PM
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I'm getting a similar sound on the X5M over small bumps. Replaced last year was the thrust-bushing assembly and lower control arms. I was thinking it could be the upper strut mount/guide support, but the X5M design is different where it seems not to have the rubber/foam like standard X5s.

Maybe the rubber/foam is built into the amount and is not serviceable? I ordered new swaybar link and will see if that eliminates the clunk.

(Pics of X5 and X5M mount)
Attached Images
  

Last edited by philly42; 01-11-2019 at 01:02 PM.
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  #10  
Old 11-30-2018, 04:38 PM
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Funf, I have a question. How hard is it to compress the strut shaft? I've had this little rattle and replaced the lower foam piece by compressing the strut enough to slip it in before the shaft expanded again. It took some effort to push down, but seemed like it should be much stiffer. My foam pieces are fine. Replaced end links and tension arm, thinking about trying lower control arm next. Just haven't had the time for a few months.
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