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Worrying Knocking Noise

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Worrying Knocking Noise

Postby b12rlw » Sat Oct 03, 2009 7:56 pm

Ive just done a full set of poly bushes. Since these went on, the car has been knocking like hell (at the rear) on over-run at any speed. The noise is more apparent when the cars coasting out of gear. I'm unsure whether its normal diff backlash noise transmitted through the poly diff mount or whether it means ££££££££ repairs to the diff, any ideas boys and girls?
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Postby Foley » Sun Oct 04, 2009 12:40 am

Whats your diff set at?
Focus ST's rule!!!
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Postby b12rlw » Sun Oct 04, 2009 5:02 pm

The noise is there regardless of diff settings mate,
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Postby WR 1mposter » Sun Oct 04, 2009 5:28 pm

Get someone to sit in the back to find out if knocking is coming from the top corner of the rear seats, if so it may be the suspension top mount, I had this before I changed to exe tc topmounts the rubber donut perished, so the top of the damper floats making it knock most of the time !

But if knocking sound like bottom end get it checked out, you may have not tightened or something may have come loose....

Or you may have the common rear suspension fault !
2007 BMW M5
2004 Petter Solberg STi
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