HELP NEEDED PLEASE...

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Craig-L
Joined: Sat 09 Jan, 2016 07:27
Posts: 7

  Z3 roadster 2.8

HELP NEEDED PLEASE...

Post by Craig-L » Wed 16 Mar, 2016 23:12

[https://www.facebook.com/photo.php?fbid ... =3&theater]

My rear wheels on my '99 2.8 widebody seem to be set about 15-20mm too back in the arches, one theory I have been given is the subframe has possibly been removed and not put back correctly, is this possible ??

Does anyone have any other ideas...?

Thanks
Craig

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
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  Z3 roadster 1.9

Re: HELP NEEDED PLEASE...

Post by BladeRunner919 » Thu 17 Mar, 2016 08:23

Image

Are you saying that they are different from one side to the other?
Is it lowered? That will push the wheels back a bit.

Craig-L
Joined: Sat 09 Jan, 2016 07:27
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  Z3 roadster 2.8

Re: HELP NEEDED PLEASE...

Post by Craig-L » Thu 17 Mar, 2016 08:30

No both sides are the same, the car has been lowered about 30 mm but I have seen Cars lowered 3 times this amount that don't have the problem.

Del
Joined: Sat 19 Nov, 2011 18:35
Posts: 2115

  Z3 roadster 1.9

Re: HELP NEEDED PLEASE...

Post by Del » Thu 17 Mar, 2016 09:17

I've encountered this (not personally) on one side - typically the nearside, when a trailing arm has been damaged by a hard thump against a high kerb. Apparently it is quite easily done. But for both sides to be identical is a bit strange - I don't buy the theory about the rear subframe being attached incorrectly - sounds a bit implausible.

bertiejaffa
Joined: Fri 26 Jul, 2013 10:28
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  M roadster S50
Location: Manchester

Re: HELP NEEDED PLEASE...

Post by bertiejaffa » Thu 17 Mar, 2016 09:30

Looks like after market wheels to me - what size are they? Could well be that they just dont fit the car very well.
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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
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  Z3 roadster 1.9

Re: HELP NEEDED PLEASE...

Post by BladeRunner919 » Thu 17 Mar, 2016 11:04

Aftermarket wheels wouldn't make the wheels not centre in the arch, unless they're oval!

bertiejaffa
Joined: Fri 26 Jul, 2013 10:28
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  M roadster S50
Location: Manchester

Re: HELP NEEDED PLEASE...

Post by bertiejaffa » Thu 17 Mar, 2016 20:29

BladeRunner919 wrote:Aftermarket wheels wouldn't make the wheels not centre in the arch, unless they're oval!
He didnt say they arent central, he says they are set too far back into the arch. if the wheel is back into the arch then i would say the offset is wrong
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gookah
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Joined: Thu 07 Aug, 2008 10:51
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  Z3 roadster 2.8

Re: HELP NEEDED PLEASE...

Post by gookah » Thu 17 Mar, 2016 21:49

bertiejaffa wrote:
BladeRunner919 wrote:Aftermarket wheels wouldn't make the wheels not centre in the arch, unless they're oval!
He didnt say they arent central, he says they are set too far back into the arch. if the wheel is back into the arch then i would say the offset is wrong
he is talking front to rear of car, not offset or inset.
If you look at the photo the gap is smaller to the bumper than it is to the rear wing behind the door.

Mine is lowered quite a bit but the wheel is still central


Image


Are they different trailing arms than they should be?
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bertiejaffa
Joined: Fri 26 Jul, 2013 10:28
Posts: 1715

  M roadster S50
Location: Manchester

Re: HELP NEEDED PLEASE...

Post by bertiejaffa » Thu 17 Mar, 2016 22:33

ah... back as in towards the back.... not back as in back... speak proper England man :lol:
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therealdb1
Joined: Tue 25 Jun, 2013 22:47
Posts: 232

  Z3 roadster 2.0

Re: HELP NEEDED PLEASE...

Post by therealdb1 » Thu 17 Mar, 2016 23:10

Something is seriously wrong with that!
I don't see any way that standard parts in serviceable condition could cause an increased wheelbase.
If it were accident damage then you would not expect it to be the same both sides.
I would be tempted not to drive the car until it has been checked by someone who knows Z3 rear suspension.
Have you got anyone nearby with a similar car so you could take the wheel off and compare against yours?

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Southernboy
Joined: Thu 07 Oct, 2010 13:39
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  Z3 roadster 3.0i
Location: Johannesburg

Re: HELP NEEDED PLEASE...

Post by Southernboy » Fri 18 Mar, 2016 08:40

Just looking at the pic you posted it seems as if the bumper isn't fitted correctly - seems to be hanging down a little if I use the "join" line / gap to the rear fender. I'm not sure it'll make a lot of difference though if you adjusted the bumper... It might be interesting to have a pic of the other wheel (left side of the car) to compare ...
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RobTFC
Joined: Mon 29 Dec, 2014 14:23
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  Z3 roadster 3.0i

Re: HELP NEEDED PLEASE...

Post by RobTFC » Fri 18 Mar, 2016 09:09

I wonder if there is a chance the car has been accident repaired and mismatched parts have been used (i.e. 4cyl parts on a 6cyl, facelift parts on a pre-facelift etc.?)

I once came across a pre facelift 2.8 that had been accident repaired and the shop had clearly fitted the wrong headlights as the sidelights in the bumper no longer came on but instead the bulbs in the headlight units as per a 4cyl model. It stands to reason that some places likely wouldn't always take due care when replacing other components as well. It could be the light, but there look to be small scratches on the very edge of the door towards the back of the car which could be indicative of panel removal/refitting without due care.

In fact it might just be the photo but the filler cap looks off center as well!

Rafolian
Joined: Wed 27 Feb, 2013 08:41
Posts: 547

  Z3 roadster 2.8

Re: HELP NEEDED PLEASE...

Post by Rafolian » Fri 18 Mar, 2016 17:41

I think his description was very clear!

Trevsky
Joined: Tue 26 Jul, 2011 22:57
Posts: 135

  Z3 roadster 1.9
Location: Leeds

Re: HELP NEEDED PLEASE...

Post by Trevsky » Fri 18 Mar, 2016 18:29

I would be tempted to drop a plumb line from the centre of each wheel onto a level surface and measure the wheelbase and if that is correct maybe the car has had a tap up the rear.

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pingu
Joined: Fri 30 Apr, 2004 17:01
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  M roadster S50

Re: HELP NEEDED PLEASE...

Post by pingu » Sat 19 Mar, 2016 00:22

BladeRunner919 wrote:Image
The bumper hasn't been refitted properly and it looks like the petrol filler cap hasn't either.

I would completely strip the boot carpets out and check for rear end damage, and remove the plastic wheel arches to check underneath.

There are 3 different trailing arms (33321091151/2, 33321094761/2 and 33322227967/8), but they all look similar. If salvage parts have been used, the wrong ones may have been fitted.
Pingu

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Deano1712
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Joined: Sat 05 Aug, 2006 13:56
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  M roadster S50
Location: Leeds

Re: HELP NEEDED PLEASE...

Post by Deano1712 » Sat 19 Mar, 2016 07:09

I would be surprised if the different types of trailing arms were different lengths. Its possible accident damage is to blame. Worth getting an alignment check done and a good look at the subframe for signs of damage.
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deni2s
Joined: Mon 25 Mar, 2013 22:02
Posts: 745

  Z3 roadster 2.8

Re: HELP NEEDED PLEASE...

Post by deni2s » Sat 19 Mar, 2016 11:02

pingu wrote: The bumper hasn't been refitted properly and it looks like the petrol filler cap hasn't either.
Petrol filler cap looks ok to me (it's just missing that rubber bump piece, that's why it closes too deep inside).

Craig-L
Joined: Sat 09 Jan, 2016 07:27
Posts: 7

  Z3 roadster 2.8

Re: HELP NEEDED PLEASE...

Post by Craig-L » Sat 19 Mar, 2016 15:04

RE: Petrol cap, yeah there is no rubber stop so it does close in a little too much.

RE: Bodywork, is it possible that a previous owner has made it into a "wide body" after an accident? and if so are there any other differences in the in the rear wings apart from obviously the width of them ??

RE: Rear bumper, to me the bumper seems to be ok, the gap between the wing and bumper top seems to be constant and the curve on the bumper seems to follow the wheelarch curve on the wing.

RE: Trailing arms, does anybody know if there are differences in length of the 3 types of arms available ??


THANKS FOR ALL SUGGESTIONS SO FAR......

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pingu
Joined: Fri 30 Apr, 2004 17:01
Posts: 3337

  M roadster S50

Re: HELP NEEDED PLEASE...

Post by pingu » Sat 19 Mar, 2016 20:14

Craig-L wrote:RE: Petrol cap, yeah there is no rubber stop so it does close in a little too much.
That explains why it doesn't look right :)
Craig-L wrote:RE: Bodywork, is it possible that a previous owner has made it into a "wide body" after an accident? and if so are there any other differences in the in the rear wings apart from obviously the width of them ??
I'm pretty sure the only difference is the track, not the wheelbase.
Craig-L wrote:RE: Rear bumper, to me the bumper seems to be ok, the gap between the wing and bumper top seems to be constant and the curve on the bumper seems to follow the wheelarch curve on the wing.
The bumper definitely looks like it's been disturbed to me. The gap along the top of the bumper should be consistent. It looks pinched near the wheel arch.
Craig-L wrote:RE: Trailing arms, does anybody know if there are differences in length of the 3 types of arms available ??
I don't know what the differences are, but they could be very slightly different lengths. As the trailing arm swings in an arc, the wheelbase changes. If a longer trailing arm has been fitted, it would need a shorter spring fitted so the running height of the car is correct (assuming the spring cups are the same distance from the pivot). This would mean that the car would look like your does.

Image

I think the most likely culprit is a bodged damage repair.
Pingu

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