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Author Knocking front suspension
luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
29th Nov 07 at 21:40   View User's Profile U2U Member Reply With Quote

The front suspension on my corsa LET has developed quite a nasty sounding knock on the front end, especially on the nearside.

Everytime I go over a speed bump over about 15 or 20mph I get a loud bang which seems to be quite heavy. There is a lowered kerb outside my house and even when i hit that i get the knock.

The shocks and springs are new standard ones
New balljoints on both sides under the hubs
Got a pair of new wishbones but only fitted the passenger side, made no difference so havent bothered fitting the drivers one yet
Tried another set of top mounts from the scrap yard
new wheel bearings both sides

None of these have made any difference and there is no anti roll bar to knock.

I cant feel any play at all when I jack the car up and grab the wheel. Then only other things i can think of are the track control arm bushes and the track rod ends.

Has anyone else got any more ideas?

[Edited on 29-11-2007 by luke85]
TheCam
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Registered: 16th Mar 07
Location: Kirkcaldy
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30th Nov 07 at 08:40   View User's Profile U2U Member Reply With Quote

hub?
my old xe done this and it turned out the part of the hub flange that goes through the wheel bearing was munched.
you'l have to take it to bits to find out though
luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
30th Nov 07 at 17:48   View User's Profile U2U Member Reply With Quote

cheers for the reply but When I put the new whell bearings in the other week I used brand new chris astley hub centres because I thought my old ones might have been slightly undersize. The hub centres have only done a few hundred mileds
Toby
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Registered: 29th Nov 05
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30th Nov 07 at 18:22   View Garage View User's Profile U2U Member Reply With Quote

standard suspension you say? as in oem shocks?
luke85
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Registered: 26th Nov 07
Location: Chesterfield
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30th Nov 07 at 18:27   View User's Profile U2U Member Reply With Quote

Yep standard shocks and sprinngs
Rob E
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Registered: 1st Jan 06
Location: Madeley, Stafford....I want to live back in Wales!
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30th Nov 07 at 19:27   View User's Profile U2U Member Reply With Quote

Have you checked your engine mounts?
luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
30th Nov 07 at 19:30   View User's Profile U2U Member Reply With Quote

Yeah theyre fine, had to change the damn clutch last week so had both the gearbox ones off. drivers side looks ok but thanks for that, theyre now on my list of possibilities
phil_sutton
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Registered: 8th Sep 07
Location: Nottingham
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30th Nov 07 at 19:32   View User's Profile U2U Member Reply With Quote


quote:

The shocks and springs are new standard ones



your taking the piss right?

if not thats your problem right there, probably hitting the bump stops when it hits a bump
Ben ev
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Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
30th Nov 07 at 20:06   View User's Profile U2U Member Reply With Quote

had this problem.
jack it up and grab the shock on the piston and see if there is play in it. if so i found that when the top mount bolt is done up the cup toches the bearing in the top mount and that in turn touches the top of the strut before the nut is tight. hope that makes sense.
basically i had to make my own shallower cups and some spacers so the nut could be tightened right up
luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
30th Nov 07 at 20:12   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by phil_sutton

quote:

The shocks and springs are new standard ones



your taking the piss right?

if not thats your problem right there, probably hitting the bump stops when it hits a bump


No, not taking the piss. Used to have coilovers on it but took them off because of the rock hard ride. Standard ones have been fine for a year on my last corsa with this engine and it never knocked once. The kerb outside my house is literally 1cm tall so i cant be hitting the bump stops when i go over that. when the car is stood you can bounce the suspension up and down like any other corsa and it never makes a sound
luke85
Member

Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
30th Nov 07 at 20:16   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ben ev
had this problem.
jack it up and grab the shock on the piston and see if there is play in it. if so i found that when the top mount bolt is done up the cup toches the bearing in the top mount and that in turn touches the top of the strut before the nut is tight. hope that makes sense.
basically i had to make my own shallower cups and some spacers so the nut could be tightened right up


Cheers for that, I think ill be taking them off tomorrow to have a look so ill let you all know how I get on

 
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