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Discussion Starter · #1 ·
Have noticed a back end thud noise when going over uneven surfaces, which in the UK is quite often :ROFLMAO:.

It sounds like a train going over points.

It's not the arb brackets, boot lid, plastic trim, battery or anything in the boot. Pretty sure it's not the exhaust, and all things I've grabbed underneath have felt solid. Any ideas?
 

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Discussion Starter · #6 ·
I'll take a look on Thursday. Day off to tinker with the car :)
 

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Discussion Starter · #7 ·
Shocks, rarb, plastic shrouds, lower arms, wheels all checked and no movement/noise. I did reposition the rarb because one bracket was fixed low and the other high, if you know what I mean. Got a jack under the high fixing side to bring the bar up and lower the fixing point to match the other side. I also plugged the rear seat belts in as it could be them banging against the plastic side trim 😚
 

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Discussion Starter · #8 ·
Still a knock noise over bumps 💩
Only thing I haven't checked I the rear mounts. Wheel off job?
 

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Discussion Starter · #9 ·
Only noticeable over slow bumps in road
 

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Discussion Starter · #12 ·
I'll take a look at them sometime, it's a wheel off and remove lining job.
 

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Discussion Starter · #14 ·
Can rear top mounts be replaced without removing the spring? With the car jacked up I'd imagine the spring would have lost all tension?
 

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Discussion Starter · #16 ·
Thanks. I'd seen that the spring was separate, surprised it would need removing as I thought lifting the car would drop the lower control arm enough to avoid that and the shock could be released at the Mount end?
 

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Discussion Starter · #17 ·
Hmmm. Think I might just buy new top mounts and shocks all round and get someone else to do it when fitting my lowering springs.
 

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Discussion Starter · #19 ·
I'm starting to think it's the rarb "clicking" as it twists in the polybushed brackets. A precursor to the full creaking noise. I'll take the polybushes off and give em a good greasing again. I'll report back.
 

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Discussion Starter · #21 ·
Rarb brackets off, bush removed and regreased, reinstalled. No more knocking noise ;)
 

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Discussion Starter · #24 ·
Not sure. The polybush is supposed to be non greased but they creaked really badly. I greased them generously and they stayed quiet for ages. Started to make a little noise one day so I used some teflon pipe tape and that worked too. I think with the rarb movement over time whatever you put in gets moved. I'll just regrease twice a year. Not a major issue to do.
 
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