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DMF Rattle? Cause?

Discuss problems you have had or are having with your Z4
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Migizi
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DMF Rattle? Cause?

Post by Migizi » Mon Jun 17, 2019 11:24 am

Clutch/DMF

Can someone explain what is the cause for the DMF rattle at idle when the clutch pedal is released (out), and the car is at idle?

If this a concern?
Can you elaborate ?
2006 BMW Z4 3.0si

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mr wilks
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DMF Rattle? Cause?

Post by mr wilks » Mon Jun 17, 2019 11:46 am

Not uncommon at all for a noise with dmf which alters when clutch is out / in
I had a 85k Si with it , clutch & box functioned perfectly , my indy said live with it as it was unlikely to fail
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Migizi
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DMF Rattle? Cause?

Post by Migizi » Mon Jun 17, 2019 12:47 pm

Thanks for the reply, I have read (on this forum) that it is not usually a concern, but for my own peace of mind, I am hoping to understand this issue a little more.

Can you or anyone elaborate on the actual source of the noise?

I'm generally not they type to 'just live with it' - call it a form of OCD :roll:
2006 BMW Z4 3.0si

Capa
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DMF Rattle? Cause?

Post by Capa » Mon Jun 17, 2019 1:10 pm

I was always under the impression that it was the thrust bearing that was on its way out.
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simon1963
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DMF Rattle? Cause?

Post by simon1963 » Mon Jun 17, 2019 7:10 pm

My dmf is getting noisy it clunks when I switch the engine off. Something to tackle when the clutch needs replacing.
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Ewazix
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DMF Rattle? Cause?

Post by Ewazix » Tue Jun 18, 2019 7:16 am

If like me you don't know a huge amount about DMF this is a useful read.....
https://pmmonline.co.uk/technical/dmf-f ... osis-tips/#
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Migizi
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DMF Rattle? Cause?

Post by Migizi » Tue Jun 18, 2019 12:07 pm

thank you Ewazix, that was helpful.
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Ewazix
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DMF Rattle? Cause?

Post by Ewazix » Tue Jun 18, 2019 3:40 pm

Migizi wrote: Tue Jun 18, 2019 12:07 pm thank you Ewazix, that was helpful.
No problem, there's more to DMF that I realised. 8)
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
2018 Cooper S Countryman
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