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Omega Help Area => Omega General Help => Topic started by: Jimbob on 20 September 2011, 08:57:12

Title: A clunk.
Post by: Jimbob on 20 September 2011, 08:57:12
Ive had a clunk from front passenger side (suspension area?) for a while (well before polybushing wishbones).
To be preceise 2 separate clunks as Ive fixed one with new droplinks.

Ive..

Polybushed wishbones (got worse)
Changed droplinks (one clunk disappeared)
Changed both track rod ends
Serviced brakes.
Geometry checked and fixed.

There is no play I can see anywhere.

During the last year shocks and springs also changed (top suspension mount reassembled and regreased etc)

This clunk only seems to happen when turning right 90 degrees, so into side roads etc.  No bumps or road surfaces, speedhumps etc bring it on.  It doesnt happen all the time.

Any ideas anyone?

Im wondering if I should do the ARB bushes 'in case' cant see any play, but they are 9 years old  :-/
or has top suspension mount disintegrated or sommat?  Dont really wanna strip it down and check..



Cheers


Title: Re: A clunk.
Post by: freecall666 on 20 September 2011, 11:43:13
last time mine had clunk it was the top rubber plate on top of the suspension. un did it all at top and changed it then stopped, only thing could see was the dome shape was different to the old one... dont know if this helps. :-/
Title: Re: A clunk.
Post by: ndmv6 on 20 September 2011, 17:50:56
top suspension bearing worn out...:@)
Title: Re: A clunk.
Post by: vauxsull on 20 September 2011, 19:07:15
Jimbob.... do you recall my calling around your house about a year ago as i wanted you to try and source a " clunk" from my miggy and you had me drive back and to and all around Saltney? well it turned out to be the front shocks that where buggered and was making the same kinda sound you describe on yours...
Title: Re: A clunk.
Post by: feeutfo on 20 September 2011, 20:46:00
Take it top baring race wasn't pitted? Does the top shock mount jump when viewed with bonet open and turning the steering...?

Checked steering knuckle on wishbone from under neigh? turn hard against full lock and see if the ball joint "rocks". Crap description of the play but it looks wrong when you see it.
Title: Re: A clunk.
Post by: Jimbob on 20 September 2011, 22:20:51
cheers, ill be back underneath tomorrow for another look around.
may swap droplinks...

more playing - its not always when turning, but does seem more promeniant when going right.

Ill try watching suspension, Mark did the bearing race and dont recall any issues - one was quite bad before hand though
Title: Re: A clunk.
Post by: Jimbob on 21 September 2011, 20:03:58
been underneath again, each wheel / both jacked up, wheels straight, each l;ock, can find no play or cause.
suspension appears fine.

Took a local oofer for a drive, plenty of clunks, moreso whilst going right, plenty going straight too...we are low on ideas

Ordered some ARB bushes from VX to try, worth it at £2.94!
Title: Re: A clunk.
Post by: SP_3.2 on 22 September 2011, 00:13:01
Hi Jimbob

When i had the same sound it was a nut that linked the ARB to the wishbone on the drivers side not being fully done up. It would happen on hard right hand turns . Once nipped up fully it was fine :y :y.
Title: Re: A clunk.
Post by: Jimbob on 22 September 2011, 09:14:04
Quote
Hi Jimbob

When i had the same sound it was a nut that linked the ARB to the wishbone on the drivers side not being fully done up. It would happen on hard right hand turns . Once nipped up fully it was fine :y :y.


Cheers Steve, Ill check that when I do the ARB bushes  :y
Title: Re: A clunk.
Post by: feeutfo on 22 September 2011, 15:52:26
Play in arb drop links can be fealt from undeneith. Both wheels must be jacked if on the drive though so as to enable access and importantly, to unstressed the roll bar, or it will be rock solid if there's play or not.
Title: Re: A clunk.
Post by: Jimbob on 22 September 2011, 15:55:10
Quote
Play in arb drop links can be fealt from undeneith. Both wheels must be jacked if on the drive though so as to enable access and importantly, to unstressed the roll bar, or it will be rock solid if there's play or not.


not tried like that, they are being changed regardless in the morning, at £2.94 may as well rule them out, plus they are 9 years old....
Title: Re: A clunk.
Post by: feeutfo on 22 September 2011, 16:03:24
Quote
Quote
Play in arb drop links can be fealt from undeneith. Both wheels must be jacked if on the drive though so as to enable access and importantly, to unstressed the roll bar, or it will be rock solid if there's play or not.


not tried like that, they are being changed regardless in the morning, at £2.94 may as well rule them out, plus they are 9 years old....
Yep, may as well for that money. But was thinking more for finding play in the drop links themselves. If worn or loose you'll feel play by grabbing the roll bar to drop link joint, while under the car, and pulling up and down.

Theres also Polly arb bushes btw. ???
Title: Re: A clunk.
Post by: Jimbob on 22 September 2011, 16:07:18
aye, had thought about poly, but decided on normal genuine at 1/10th the price.

I like the ride and dont want to get too harsh next.


Any engine mounts or anything could cause this?
Title: Re: A clunk.
Post by: feeutfo on 22 September 2011, 16:14:12
Quote
aye, had thought about poly, but decided on normal genuine at 1/10th the price.

I like the ride and dont want to get too harsh next.


Any engine mounts or anything could cause this?
Possible I guess, but no experience of that personally.
Title: Re: A clunk.
Post by: Entwood on 22 September 2011, 19:37:02
Quote
aye, had thought about poly, but decided on normal genuine at 1/10th the price.

I like the ride and dont want to get too harsh next.


Any engine mounts or anything could cause this?

I don't see engine mounts being linked to sharp right turns TBH  .... my guesss those would be affected by lumps/bumps not turns .... ARB bushes certainly move more on turns... thats their job after all !! ......
Title: Re: A clunk.
Post by: Jimbob on 26 September 2011, 09:27:44
ARB bushes have improved body roll, new ones much harder than the soft things that came out.

Made no difference to clunk though.

It does it mainly, but not exclusively when turning right.
only seems noticable at speeds under 30mph.

Im at a bit of a loss now.

I can generate a clunk by pushing the exhaust at exit end with my foot, wonder if its that and noise travelling.

car handling beautifully, just an annoying clunk
Title: Re: A clunk.
Post by: tunnie on 26 September 2011, 09:49:46
Is the exhaust GM, but not the decent old school ones? I had issues with drivers side centre section hitting the subframe, only at idle though due to vibration through the exhaust. Worth someone pushing exhaust while your in it? See if its similar?
Title: Re: A clunk.
Post by: Jimbob on 26 September 2011, 09:51:44
Is the exhaust GM, but not the decent old school ones? I had issues with drivers side centre section hitting the subframe, only at idle though due to vibration through the exhaust. Worth someone pushing exhaust while your in it? See if its similar?

Nah Walker shite.....its fubar anyway, will be replaced in about a month (when I have some 'free time' ;) )
Title: Re: A clunk.
Post by: tunnie on 26 September 2011, 09:56:12
Is the exhaust GM, but not the decent old school ones? I had issues with drivers side centre section hitting the subframe, only at idle though due to vibration through the exhaust. Worth someone pushing exhaust while your in it? See if its similar?

Nah Walker shite.....its fubar anyway, will be replaced in about a month (when I have some 'free time' ;) )

Exhaust all mounts ok? Thing is if that was causing the noise, surely it would also do it with 'spirited' drive down the lanes  :-\

Odd its low speed only  :-\
Title: Re: A clunk.
Post by: Jimbob on 08 October 2011, 17:31:14
Had some time today, so out of sheer curiosity I refitted the polybushes that side and ensured torqued correctly
also swapped the droplinks left to right.

Made no difference.

Exhaust is noisy, but I really dont think its the source of the clunk....blowing worse and worse by the day :(

Dont know if I imagined it, but the wheel on the side in question may have dropped 'a little funny' when lowering it onto stands, cant say what why how, just something made me 'double take' as it went down.

I fear it is something shock related, no idea what though.
Title: Re: A clunk.
Post by: feeutfo on 08 October 2011, 19:26:27
Not just the wheels being "pinched" as it's dropped off the jack...?  :-\

So...is this during lateral/sideways load only, ie not bump related at all?

What sort of cl... Can you do a video with sound we can listen to?

Other thoughts, did you have a wheel baring issue? Steering knuckle bolt torques correctly? 110nm is it?

Is everything out of the car, empty glove box, nothing under the seats, nothing rolling around?(sorry)

..... top shock mount tight. 24mill ring spanner?

Any wear in the caliper sliders?...actually, no it won't be that of not bump related.
Title: Re: A clunk.
Post by: Jimbob on 08 October 2011, 20:44:24
There are a few turns (like into my road) that always generate it, so recording should be possible....not tonight though as im off to work in a bit :(

everything seems tight, maybe a tiny bit of bearing play.
top shock seems tight
calipers fine after a service a few weeks ago

been down the checking everything tied down route.

the noise can happen at any time
90 degree right turns can bring it on more than anything.
Title: Re: A clunk.
Post by: Jimbob on 23 October 2011, 09:24:39
not managed to get anything audible on a recording.

It could possibly be exhaust related, and thats about to be replaced.  Be ordering in the next day or 2.

All bushes poly, and arb either copper greased or silicone sprayed before fitting.

Title: Re: A clunk.
Post by: feeutfo on 23 October 2011, 21:48:57
I guess take a haynes and a torque wrench out and check every bolt is correct to each description...?
Title: Re: A clunk.
Post by: Jimbob on 23 October 2011, 21:51:00
I guess take a haynes and a torque wrench out and check every bolt is correct to each description...?
I wonder whats given you that idea :y
Title: Re: A clunk.
Post by: feeutfo on 23 October 2011, 22:23:22
Yep, I hate noises, ESP from the wrong end of a keyboard. ;D