Suspension out at rear according to garage - Eibach springs and lowered 30mm

ROBOTCOWBELL · Post by **ROBOTCOWBELL** » Mon Jun 10, 2019 11:03 am

Hi - My car is in the garage after a bump to the left rear wheel arch, they say the suspension is slightly out at rear but as its not OEM and is lowered (30mm on Eibach springs) it would be slightly "off".
Does this sound right?

Does anyone have any numbers i can share that would indicate correct range?

ben g · Post by **ben g** » Mon Jun 10, 2019 11:19 am

What do they mean when they say it's slightly out? Are they saying somethings broken or that the alignment is out of factory spec?

If the latter, then Eibachs would most likely be the cause of this.

Also, rear trailing arm bushes do require replacing on Z4's. That could also give a dodgy alignment reading, if that's what they're talking about.

ROBOTCOWBELL · Post by **ROBOTCOWBELL** » Mon Jun 10, 2019 1:27 pm

Thanks Ben, it's not broken (although he said it was very rusty

- 15 years old Zed.... ) - i think he is saying its out of alignment with factory spec. But how far out of alignment i'm not sure... i will ask him about the trailing arm bushes.. Thanks!

R60BBA · Post by **R60BBA** » Mon Jun 10, 2019 2:21 pm

ROBOTCOWBELL wrote: ↑Mon Jun 10, 2019 11:03 am Hi - My car is in the garage after a bump to the left rear wheel arch, they say the suspension is slightly out at rear but as its not OEM and is lowered (30mm on Eibach springs) it would be slightly "off".
Does this sound right?
Does anyone have any numbers i can share that would indicate correct range?

Have they done a wheel alignment to confirm this?

Thrustyjust · Post by **Thrustyjust** » Mon Jun 10, 2019 6:39 pm

When I put Eibachs on my Focus ST, by lowering it by the 30mm or so, as spec, it then pushed the camber of the rear wheels out , which then caused the inner edges of the tyres to wear as the weight of the car was then pushing on that. it made about 2.5 deg negative on my home made camber gauge. Perhaps that is what they are talking about. I bought for the ST, some camber adjustment bolts made by Eibach , which are an ovalised bolt to then adjust the camber back to the 0.5 deg neg camber which then stopped the wear and the car sat better too. I suspect that making large drops in suspension height on the Zed , may well have caused something similar with the geometry. The wheel will not work on a perfect line when you drop suspension.

Scooba_Steve · Post by **Scooba_Steve** » Thu Jun 13, 2019 6:09 pm

Is it out of spec by the same amount, on both sides

ROBOTCOWBELL · Post by **ROBOTCOWBELL** » Sat Jun 15, 2019 2:39 pm

I finally have the geometry, any thoughts on this welcome

: IMG_1778.jpg (112.06 KiB) Viewed 1106 times

Thrustyjust · Post by **Thrustyjust** » Sat Jun 15, 2019 3:41 pm

That will eat the inside of the rear tyres with camber like that. NSF is too much as well, hence why they are showing red.

mmm-five · Post by **mmm-five** » Sat Jun 15, 2019 3:58 pm

Why is the 'after' almost identical to the 'before'?

You'd want it to be in the green everywhere to get it back to 'stock'.

Also, if they're using a Hunter system, then need to tell it you've got lowering springs on it, otherwise the 'target' figures will be wrong.

R60BBA · Post by **R60BBA** » Sat Jun 15, 2019 4:39 pm

ROBOTCOWBELL wrote: ↑Sat Jun 15, 2019 2:39 pm I finally have the geometry, any thoughts on this welcome IMG_1778.jpg

Who did this job? Stevie Wonder?

Way too much negative camber at the back.

In reg to the front, for a sporty drive you could run -1.5 but both your left and right would have to be at -1.5 as opposed to just your left being at -1.5 and your right at 0.38.

Not being funny but I wouldn’t pay for that until they got the car within tolerances (which would mean all the icons would be green as opposed to red).

R60BBA · Post by **R60BBA** » Sat Jun 15, 2019 4:42 pm

These are the tolerances for your motor.

ROBOTCOWBELL · Post by **ROBOTCOWBELL** » Mon Jun 17, 2019 7:11 am

R60BBA wrote: ↑Sat Jun 15, 2019 4:42 pm These are the tolerances for your motor.

Thanks for sharing this. Are these the tolerances with it lowered etc? So I could pass this to the garage?

R60BBA · Post by **R60BBA** » Mon Jun 17, 2019 11:21 am

ROBOTCOWBELL wrote: ↑Mon Jun 17, 2019 7:11 am
R60BBA wrote: ↑Sat Jun 15, 2019 4:42 pm These are the tolerances for your motor.
Thanks for sharing this. Are these the tolerances with it lowered etc? So I could pass this to the garage?

Ahh yes sorry the above is for the 3.0 on m sport suspension.

The below is for your 2.2 on SE suspension.

Taken from here: https://www.newtis.info/tisv2/a/en/e85- ... t/3lctg8QV

ROBOTCOWBELL · Post by **ROBOTCOWBELL** » Tue Jun 18, 2019 9:17 pm

Sadly MOT failed and now looking like this is becoming an expensive project that I'm not really skilled for so will be putting my Zed up for sale for someone to hopefully take on as a bargain and bring back to glory. I have found one I like for sale on Facebook and viewing Friday, fingers crossed.....

To be continued.....

Thanks all for your advice

Thrustyjust · Post by **Thrustyjust** » Wed Jun 19, 2019 1:30 pm

It hasnt failed on much. The front spring explains why that is out on the print out. Seems sad to let it go for a set of shocks, a drop link and a couple of bulbs !!

Z4-forum.com

Z4-forum.com