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Rear springs- alignment
- bigwinn
- Lifer
- Posts: 4559
- Joined: Wed Jul 08, 2020 7:13 pm
- Location: Lincoln UK
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Rear springs- alignment
Hi all
Over the years Ive changed and updated several rear suspensions.
I'd say 2 times out of 10 I've been left with a very annoying clunk- most times I've been and checked tightness of ARB bushings, top mounts and the like
However I have a gut feel that its the actual positioning of the spring that causes the noise- and it its not seated or positioned/turned correctly then the noise will happen when the car is traversing uneven ground
Has anyone seen or experience of how the springs should be orientated?
Cheers
Stuart
Over the years Ive changed and updated several rear suspensions.
I'd say 2 times out of 10 I've been left with a very annoying clunk- most times I've been and checked tightness of ARB bushings, top mounts and the like
However I have a gut feel that its the actual positioning of the spring that causes the noise- and it its not seated or positioned/turned correctly then the noise will happen when the car is traversing uneven ground
Has anyone seen or experience of how the springs should be orientated?
Cheers
Stuart
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- 1536Z4
- Senior Member
- Posts: 1572
- Joined: Thu Nov 19, 2020 9:37 pm
- Location: North Shropshire
Rear springs- alignment
Can`t help with orientation but I have had the same issue since fitting coilovers and have checked everything but still get a clonk so it would be interesting if it is a spring position issue .
Montego Blue E86 . MILV`s . Simpson Custom Manifold Race Exhaust . xHP transmission stage 3 . VT engine mounts . BC RA coilovers . H&R arbs . Adjustable rear camber arms . Ultra Racing front strut brace . Drexler LSD .
- bigwinn
- Lifer
- Posts: 4559
- Joined: Wed Jul 08, 2020 7:13 pm
- Location: Lincoln UK
- Contact:
Rear springs- alignment
Steve and I talked it over and he thinks he has seen a post saying there is deffo a right and wrong way to position
I'll keep you posted
I'll keep you posted
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- 1536Z4
- Senior Member
- Posts: 1572
- Joined: Thu Nov 19, 2020 9:37 pm
- Location: North Shropshire
Rear springs- alignment
Montego Blue E86 . MILV`s . Simpson Custom Manifold Race Exhaust . xHP transmission stage 3 . VT engine mounts . BC RA coilovers . H&R arbs . Adjustable rear camber arms . Ultra Racing front strut brace . Drexler LSD .
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- Member
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- Location: South Cheshire
Rear springs- alignment
Pre-facelift E85 3.0i SE with manual gearbox - written off by insurer
Some accessories for sale now and in the future.
Some accessories for sale now and in the future.
- 1536Z4
- Senior Member
- Posts: 1572
- Joined: Thu Nov 19, 2020 9:37 pm
- Location: North Shropshire
Rear springs- alignment
Just throwing this out there as I have heard of stranger things but could it be something to do with the rear drop links . When I changed to coilovers I lowered the car and replaced the rear drop links with new bmw ones but could the fact that the car is now lower be putting extra strain on the rear drop links causing the knock ?
Montego Blue E86 . MILV`s . Simpson Custom Manifold Race Exhaust . xHP transmission stage 3 . VT engine mounts . BC RA coilovers . H&R arbs . Adjustable rear camber arms . Ultra Racing front strut brace . Drexler LSD .
- bigwinn
- Lifer
- Posts: 4559
- Joined: Wed Jul 08, 2020 7:13 pm
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Rear springs- alignment
Drop links are ok and free of the metal arms
It’s deffo a spring noise as I managed to recreate it once when manipulating the arm up and down with a jack
It’s deffo a spring noise as I managed to recreate it once when manipulating the arm up and down with a jack
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- Member
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Rear springs- alignment
Not experienced this, but could it be when using lowering springs that become loose when suspension is on full droop?
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- enuff_zed
- Lifer
- Posts: 14383
- Joined: Wed Oct 26, 2016 11:05 am
- Location: Attleborough, Norfolk
Rear springs- alignment
First time I changed the rear drop links on one I ended up with a clunk, even though nothing was touching.
Rightly or wrongly I had changed them with the suspension drooping (on axle stands, wheels off)
Eventually I ran the rear of the car up on a pair of ramps, loosened everything off and re-did it all with 'weight on wheels'.
Noise went away.
Rightly or wrongly I had changed them with the suspension drooping (on axle stands, wheels off)
Eventually I ran the rear of the car up on a pair of ramps, loosened everything off and re-did it all with 'weight on wheels'.
Noise went away.
- bigwinn
- Lifer
- Posts: 4559
- Joined: Wed Jul 08, 2020 7:13 pm
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- Contact:
Rear springs- alignment
I think we fixed it- almost (still a slight adjustment needed)
The anti roll bar was positioned wrong- too far to the offside. As the car was traversing adverse cambers the bar was fouling on the metal of the ARB bush holder
5mm to the nearside made all the difference
The anti roll bar was positioned wrong- too far to the offside. As the car was traversing adverse cambers the bar was fouling on the metal of the ARB bush holder
5mm to the nearside made all the difference
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- enuff_zed
- Lifer
- Posts: 14383
- Joined: Wed Oct 26, 2016 11:05 am
- Location: Attleborough, Norfolk
Rear springs- alignment
How odd?bigwinn wrote: ↑Thu Oct 27, 2022 3:17 pm I think we fixed it- almost (still a slight adjustment needed)
The anti roll bar was positioned wrong- too far to the offside. As the car was traversing adverse cambers the bar was fouling on the metal of the ARB bush holder
5mm to the nearside made all the difference
You'd think looking at the way it is mounted that it would centralise itself?
- bigwinn
- Lifer
- Posts: 4559
- Joined: Wed Jul 08, 2020 7:13 pm
- Location: Lincoln UK
- Contact:
Rear springs- alignment
We only saw it by putting tension across the back axle when raised upenuff_zed wrote: ↑Thu Oct 27, 2022 3:43 pmHow odd?bigwinn wrote: ↑Thu Oct 27, 2022 3:17 pm I think we fixed it- almost (still a slight adjustment needed)
The anti roll bar was positioned wrong- too far to the offside. As the car was traversing adverse cambers the bar was fouling on the metal of the ARB bush holder
5mm to the nearside made all the difference
You'd think looking at the way it is mounted that it would centralise itself?
If the forum helped you, why not help the forum back. Thats the Z4 way!
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- 1536Z4
- Senior Member
- Posts: 1572
- Joined: Thu Nov 19, 2020 9:37 pm
- Location: North Shropshire
Rear springs- alignment
Will have to check this and if all ok I think I will loosen everything off and try again .
Montego Blue E86 . MILV`s . Simpson Custom Manifold Race Exhaust . xHP transmission stage 3 . VT engine mounts . BC RA coilovers . H&R arbs . Adjustable rear camber arms . Ultra Racing front strut brace . Drexler LSD .