GolfGTIforum.co.uk

Model specific boards => Golf mk3 => Topic started by: javalin on 22 March 2012, 08:45

Title: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 08:45
Hello

Changed my rear shocks last night for a pair of Meyle ones, old ones had oil leaks and generally buggered.

Knocking from the o/s/r now when bumpy roads, not all the time.  Can't get it to make a noise when bouncing or rocking the car by hand.

Any ideas?  Sounds like the shock bouncing the in the turret?

James
Title: Re: rear knocking after shocks change...
Post by: thai-wronghorse on 22 March 2012, 09:05
Did you check the top mounts on replacement?
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 09:09
oh yes, just going to add - new top mounts and new bump stop & covers fitted.

Ta

James
Title: Re: rear knocking after shocks change...
Post by: thai-wronghorse on 22 March 2012, 09:19
Assembled incorrectly maybe or could the soggy old shocks have been masking worn out rear beam bushes?
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 09:24
assembled fine,and same for both sides, was very careful to strip and rebuild as was originally built.  Could be beam bushes I guess.

blurry picture of assembled strut.

(http://javalins.files.wordpress.com/2012/03/shocks_4.jpg)

James
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 09:51
and for laughs the old shocks - can you tell which failed the MOT....?

(http://javalins.files.wordpress.com/2012/03/shocks_1.jpg)
Title: Re: rear knocking after shocks change...
Post by: thai-wronghorse on 22 March 2012, 10:38
Bit moist that.  :laugh:
Title: Re: rear knocking after shocks change...
Post by: VR6_Wherry on 22 March 2012, 10:44
Bit moist that.  :laugh:

 :grin:

Looks ruined!

To be fair 'the better one' doesn't look great either! :laugh:
Title: Re: rear knocking after shocks change...
Post by: Wayne on 22 March 2012, 11:43
Did you tighten the top nut with the weight of the car on it, worth checking they are tight in anycase.
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 11:47
Thanks Wayne - No I didn't - just suspension weight on it.

Will check this out tonight!

Thanks!
Title: Re: rear knocking after shocks change...
Post by: Deano2711 on 22 March 2012, 12:09
When the garage changed my rear springs he did not tighten the top nut properly and I had the same noise you are getting. I went back and played my mouth a bit but was easily sorted.
Title: Re: rear knocking after shocks change...
Post by: Wayne on 22 March 2012, 13:42
Thanks Wayne - No I didn't - just suspension weight on it.

Will check this out tonight!

Thanks!

I suspect they are loose in that case.
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 16:06
I suspect this guy has it right - its a BMW forum link but he recons the top shock mount was the problem for the OP.  Mine is similarly buggered, so will check bolts tonight just in case and then plan to change the shock mount rubber.  Interesting video in the post though.

http://forums.bimmerforums.com/forum/showthread.php?t=1484279 (http://forums.bimmerforums.com/forum/showthread.php?t=1484279)
Title: Re: rear knocking after shocks change...
Post by: Wayne on 22 March 2012, 16:32
Your post earlier said you fitted new ones, if not then yes change them.
Title: Re: rear knocking after shocks change...
Post by: javalin on 22 March 2012, 17:49
ok sorry not clear, new top mounts fitted but not shock rubber...
Title: Re: rear knocking after shocks change...
Post by: javalin on 26 March 2012, 08:42
okay - so new front shocks installed at the weekend, and new shock rubber installed in the rear shocks.

It knocks like a bugger now from the o/s/r - sure I've put it together correctly and that its tight.  Mainly when accelerating.

Wife sat in the back at the weekend and said the top mount wasn't moving at all.  She seemed to think the knocking was further forward, i.e. beam bushes, but not 100% sure about that.  Sounds to me like the shock.

Any ideas...........?

James
Title: Re: rear knocking after shocks change...
Post by: thai-wronghorse on 26 March 2012, 09:03
Faulty shock unit maybe?
Title: Re: rear knocking after shocks change...
Post by: javalin on 26 March 2012, 09:11
mmmm - don't think so - both felt much the same to me (i.e. effort to pull the piston up).
Title: Re: rear knocking after shocks change...
Post by: brett on 26 March 2012, 09:40
i had similar a while back got some shocks of someone and said they was ready to go on the car ,only to find that the metal circlip missing on the shaft of the shock,maybe worth a look,brett
Title: Re: rear knocking after shocks change...
Post by: javalin on 26 March 2012, 21:02
I think i've found the issue.  The o/s/r wheel rocks top to bottom when pulled,  n/s/r not so much.  Thats bearings isn't it?

Couldn't find a fault, or get the rear stuts to move....
Title: Re: rear knocking after shocks change...
Post by: Wayne on 26 March 2012, 21:33
I think i've found the issue.  the o/s/r wheel rocks top to bottom when pulled.  the n/s/r not so muvh.  thats bearings isn't it?

Yep, bearing has had it.
Title: Re: rear knocking after shocks change...
Post by: javalin on 28 March 2012, 14:18
Garage have adjusted the bearings (local vw speciallist), as they are adjustable apparently?  It sounds like they've just tightend the nut and put a new split pin in.... Hmmmm.

Knocking continues....., but less noise and actual vibration/feedback in the car.  Mainly on acceleration/braking.

I'll check it out again tonight and see, but suspension continues to feel solid - at least I can't make it knock.  So I guess either the bearings have had it and new ones required, or maybe beam bushes.  There is not much left thats not new...

James
Title: Re: rear knocking after shocks change...
Post by: Wayne on 28 March 2012, 17:00
Long shot but are you sure the exhaust is not toucing the rear beam.
Title: Re: rear knocking after shocks change...
Post by: tweed on 28 March 2012, 17:03
Seen that happen before
Title: Re: rear knocking after shocks change...
Post by: javalin on 28 March 2012, 17:08
interesting - i'll check.

there is still play in the rear wheels.....  back to the garage i think....

james
Title: Re: rear knocking after shocks change...
Post by: Bellend on 28 March 2012, 18:36
interesting - i'll check.

there is still play in the rear wheels.....  back to the garage i think....

james

You know there is always a small bit of play, yes?
Title: Re: rear knocking after shocks change...
Post by: javalin on 28 March 2012, 20:36
There is a different amount of play between o/s/r and o/s/l.  It was fine immediatly after it was ajusted but now (24 hours later) its back to where it was - so something is not right.

Still... Back in the garage again today....

James

(edited)
Title: Re: rear knocking after shocks change...
Post by: javalin on 30 March 2012, 13:21
FIXED.

The rear part of the exhaust wasn't installed correctly and was knocking.  I think the bearings adjustment helped too though.

thanks all for your help!

James
Title: Re: rear knocking after shocks change...
Post by: AudiA8Quattro on 30 March 2012, 14:18
interesting - i'll check.

there is still play in the rear wheels.....  back to the garage i think....

james

You know there is always a small bit of play, yes?

A VERY small amount of play, pretty much zero, and the wheel should spin smoothly.