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Old 23rd June 2018, 08:04 AM   #1
Ef52
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Default Clunk and dif bolt coming loose

I recently noticed a clunk from the back of the car which was noticeably getting worse. On inspection, a bolt on the drivers side which inserts width ways across the car had come loose on the dif.

Once tightened, all was good and no clunking. It now sounds like it has backed itself out again after a few days and less than 100 miles. Are these bolts prone to stretching or other issues or should I just get some locktite this time?

Interested if anyone else has had this issue
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Old 23rd June 2018, 08:38 AM   #2
simplicity
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I believe the bolt is a stretch bolt so replacing it would be a good idea. Maybe a little threadlick when you do to help
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Old 23rd June 2018, 09:35 AM   #3
TimCSL
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As above. This bolt is normally torqued unbelievably tight and has likely stretched. Get a new one from the dealers and replace the two rear bolts with the revised BMW version if not already done. Part no. 23001222891
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Old 23rd June 2018, 09:57 AM   #4
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Thanks a lot for the replies. Very helpful!
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Old 23rd June 2018, 12:15 PM   #5
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If it keeps getting loose, a spring washer might be wirth trying as well.
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Old 23rd June 2018, 12:43 PM   #6
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Quote:
Originally Posted by HeroHonda View Post
If it keeps getting loose, a spring washer might be wirth trying as well.
No it wouldn't
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Old 23rd June 2018, 04:29 PM   #7
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Single use and 200 Nm should sort it.
I can not remember what I paid for that bolt but it was not cheap.
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Old 23rd June 2018, 04:59 PM   #8
m3rosco
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As above, fit a new bolt and torque it up to 200 Nm. Use a bit of threadlocker too. Think the bolt is about 15 from the dealers.
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Old 23rd June 2018, 11:03 PM   #9
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Originally Posted by HARBER07 View Post
No it wouldn't
Extremely helpful sir :clap clap:
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Old 23rd June 2018, 11:32 PM   #10
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200nm. If you don't do it to that it will eventually come loose. Personally I would just do it up to 200nm first and see how it goes. I've reused the diff bolts plenty of times.
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Old 24th June 2018, 01:54 AM   #11
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200nm. If you don't do it to that it will eventually come loose. Personally I would just do it up to 200nm first and see how it goes. I've reused the diff bolts plenty of times.
Sound advice^^
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