moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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I lowered my corsa 40mm on fk suspension, this was about 3 months ago.
Im getting a knocking sound from the back of the car, and i cant find what it is. Its gradually got worse (cant really remember when it started, so it might be nothing to do with the suspension)
Ive had the rear seats, seatbelts, doorcards, boot plastics, hudralic boot lifters, parcell shelf, rear clusters, spare wheel and tools, etc all off/out, and it doesnt seem to be them.
it could be either the shocks/suspension bushes, the bolt that holds the shock to the trailing arm (it looks slightly worn, but it shouldnt make much
difference)
or the exhaust, but that all seems fine, not hitting anywhere at all (its std system with peco bb4 back box, could the sound be the baffles?? As iv heard peco r bad for this)
I really dont know, its totally doing my head in!!
Makes me wanna sell the car. please please help
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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could be the zoorst hitting the rear beam. although i have never understood how this happens cos even lowered 60mm mine is about 4 inch away from it.
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Rocky
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Registered: 16th Nov 02
Location: Bridgend S.Wales Drives : Astra VXR
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Mate i have had the same thing as u way back when i had me 17s fitted and Apex 40mm kit way back!!! I got it no more due to me and my dad checking the whole car out for it, it was really bad going up the road banging, well i tell u what it is mate its nuthing to do with the exhaust its a bracket right underneath ya back axle bar so wen u driving it keeps on hiting it and thats wat makes the sound if u get under the car u will see it just get sum 1 to push the car down and let it go up u will see the bracket when i found mine it was badly hit and worn so all u got to do is bend the bracket back and job dun no more sound  try it mate and let me know how u got on 
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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quote:
Originally posted by Kris TD
could be the zoorst hitting the rear beam. although i have never understood how this happens cos even lowered 60mm mine is about 4 inch away from it.
Deff not the zorst, ive adusted it loads of times and its deff not that.
any pics of this bracket?? As ive had a look under the car on a ramp, and theres nothing obvious.
thanks 4 help so far ppl
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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not the zoorst hitting the rear bumper?
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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or the rear panel. does it stop if u rev the engine a little?
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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i thought it was that too, but ive made shure its not touching (and cant touch when u shake the backbox about)
after i replaced the centre section the hanger on the bb4 was touching the metal lip near the bumper, but i adusted it and thats fine now.
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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it only make the noise when the cars moving, especially on bumpy/rough road
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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have u put bumpstops, even standard ones on the rear shocks?
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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well the dust cover for the shocks has an integrated bumpstop. it sits on the piston rod, and if the shock is compressed enough its sandwiched between the top of the chamber, and a washer that the top rubber bush sits on
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Rocky
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Registered: 16th Nov 02
Location: Bridgend S.Wales Drives : Astra VXR
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i had a rattling sound on me front shocks but i tightined them thats gone now, but there is a small bracket rite under the back axle thats wat making the banging noise i had the same problem
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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cheers mate. will hav a look later
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TOMAS
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Registered: 7th Aug 02
Location: Nottinghamshire
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It will be the bolts holding the damper to the trailing arm. They are a cunt for the treads stripping. If they are not tight the bush moves around and causes the noise. If they are stripped like what happeded to mine you can drill out the tread and use a longer bolt with a new nut on the back of the old stripped nut. 
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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yeah tomas i think thats what it could be, i slackened them off half a turn, rocked the car, and the noise was much worse, so i think thats wot it is.
there not stripped, but the centre does look a bit worn
Will the be expensive from vaux?
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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And there was no sign of this bracket that dj rocky was on about, maybe it only came on <97 corsas
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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i had this prob with spax on my astra, i found that the bushes wernt up to the job an caused it to clunk loads
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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which bushes? top, or bottom? Also can these be changed?
Its driving me crazy, just feel like selling the car.
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moddedcorsa
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Registered: 15th Aug 02
Location: Argyll, West scotland
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any 1 else hav ideas?
[Edited on 14-10-2003 by moddedcorsa]
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