Half shaft

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ChrisS
Joined: Thu 30 Jul, 2009 09:11
Posts: 181

  Z1 roadster
Location: Witney

Half shaft

Post by ChrisS »

When I start driving, I get a crunch noise after a few inches of movement, like driving over a plastic cup. It makes the same noise when the weight shifts going round roundabouts. I had the car up on a ramp and could feel that the half shaft on the driver's side moves laterally. There appears to be a repair kit #331369, and also interior and exterior repair kit bellows. I cant work out which pieces actually need replacement from the BMW Classic Shop page. Has anyone had to do this job, and would I be better off just ordering from a local motor factor?

felix
Joined: Sat 02 Jul, 2005 16:25
Posts: 588

  Z1 roadster

Re: Half shaft

Post by felix »

i think some lateral movement in a halfshaft is to be expected; they need to extend and contract as the suspension droops and compresses. Is one side noticeably different from the other?

ChrisS
Joined: Thu 30 Jul, 2009 09:11
Posts: 181

  Z1 roadster
Location: Witney

Re: Half shaft

Post by ChrisS »

Yes. The right moves a little, to accommodate suspension movement. The right moves more and the creaky rattle is annoying.

felix
Joined: Sat 02 Jul, 2005 16:25
Posts: 588

  Z1 roadster

Re: Half shaft

Post by felix »

CV joints tend to rumble as they start to wear. Do you get any noise when moving? Can you check that all of the bolts that attach the inner CV joint to the diff flanges are tight?

Any chance it's a wheel bearing? Although your car doesn't have enough miles for CV joint or wheel bearing issues.

And try driving off with the handbrake applied slightly to see if that changes anything.

ChrisS
Joined: Thu 30 Jul, 2009 09:11
Posts: 181

  Z1 roadster
Location: Witney

Re: Half shaft

Post by ChrisS »

My car has now done 155,000 km so it could really be anything. The CV boots, both inner and outer, are in good order, so I didn't think the CV joints themselves could fail. The noise is just a crack when you start off or transfer weight on roundabouts. Do I assume correctly that the "repair kit bellows" parts 341647 and 343872 are just the boots and their fixings. I haven't noticed the CV joints themselves listed on the BMW Classic site. I hope they are still available if that's what I need. Thanks anyway for the "They all do that" comment. It's reassuring that I don't need to take further steps until the autumn.

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