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Author Topic: knock at rear when going over bumps  (Read 1901 times)

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PSABIN8951

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knock at rear when going over bumps
« on: 12 December 2011, 02:33:46 »
i have a single thump noise which occurs every time i go over a bump. it comes from the rear on my 2002 2.6 elite auto estate. any thoughts what it could be?
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freecall666

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Re: knock at rear when going over bumps
« Reply #1 on: 12 December 2011, 03:12:19 »
spare wheel not screwed down propper. any thing in side compartments lose.
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Michael2.6

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Re: knock at rear when going over bumps
« Reply #2 on: 12 December 2011, 08:48:05 »
If not above start checking exhaust  suspension  etc

something is either loose or worn.
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fiend61

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Re: knock at rear when going over bumps
« Reply #3 on: 12 December 2011, 09:27:55 »
exhaust banging due to broken mount ?
suspension mounts loose?,
rear anti roll bar bushes?
also check that your tailgate is closing properly and isnt loose ?
just a few things to check  :y
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less

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Re: knock at rear when going over bumps
« Reply #4 on: 12 December 2011, 12:19:34 »
Could also be a failed shock absorber. Are there any signs of fluid leakage on rear shocks?
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zirk

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Re: knock at rear when going over bumps
« Reply #5 on: 12 December 2011, 18:02:04 »
Not enough carpet wrapped around the body in the back.
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hotel21

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Re: knock at rear when going over bumps
« Reply #6 on: 12 December 2011, 18:13:29 »
Quote from: zirk on 12 December 2011, 18:02:04
Not enough carpet wrapped around the body in the back.
or the knots have come undone and said body can now knock out morse on the bodywork.....   ;)   ;D
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feeutfo

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Re: knock at rear when going over bumps
« Reply #7 on: 12 December 2011, 21:06:27 »
Quote from: less on 12 December 2011, 12:19:34
Could also be a failed shock absorber. Are there any signs of fluid leakage on rear shocks?
if it is suspension based, and not random like sumat loose or flapping around, thats got to be favourite. Esp if self level shocks fitted, they leek thier oil, damping is lost and the wheel leaves the road over bumps, landing again with a bang/thump. Trade card link below, makes self level shocks half price.
 If thats whats causing it, and you want to stay stock with Elite suspension. Comfy,but wobbly.  ;)
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PSABIN8951

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Re: knock at rear when going over bumps
« Reply #8 on: 13 December 2011, 12:55:55 »
Thanks for all the replies guys, im working my way through the possibles now. I know its not the obvious ones like loose stuff in load area or unsecured spare wheel. Will let you know what it turns out to be
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PSABIN8951

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Re: knock at rear when going over bumps
« Reply #9 on: 30 January 2012, 21:11:49 »
All becomes clear!!!! Ive done a test on the self levelling suspension today and find only the passenger side pumps up with air being expelled out the bottom of the drivers side one. With assistance bouncing the car whilst holding offending shock changes note of the knock. So two new shocks now ordered albeit not self levelling ones!!!
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Andy B

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Re: knock at rear when going over bumps
« Reply #10 on: 30 January 2012, 21:18:34 »
Quote from: PSABIN8951 on 30 January 2012, 21:11:49
.... So two new shocks now ordered albeit not self levelling ones!!!

New self levellers are 'only' £180 for the pair on Trade Club .......... I've just fitted a pair to my saloon  ;)
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