Fahrwerk: LAD rear right hight problem

[Erlingur]

Hi boys,

I have LAD system at my E32 750.
I just bought Rondell 58 18" ! and the car is impossible to drive due to lack of ride hight at the rear.
I read on the bimmerboard that that is possible to adjust the right hight at the rear with some adjustments. Can you boys tell me how to increase the ride hight so I don't have to sell the Rondell 58 agin. The look of the car is crazy with them

Hertzliche grusse aus Island

[Nils024]

Hi,

if you put the car on a ramp/car lift so you can stand under the car you can loosen the 2 nuts of the u-shape clamp on the rear anti-roll bar.

the u-shape clamp is attached to a metal rod that goes to the LAD valve on the side of the differential.

if you pus the ord forward or backward the suspension will move up or down. move the rod a little bit until the suspension is high enough. then tighten the 2 nuts of the u-shape clamp again.

it takes a couple of times to get the suspension right because it moves up and down quick when you move the rod just a little bit.

do not adjust the rod when the car is standing on the road because the car can crush you if it moves down too far.

[Erich]

Just see my website below , instructions with pics, and yesterday I posted on Bimmerboard the ride height data based on different wheel sizes as per the Bentley book, probably you have seen that.

[Erlingur]

Thanks for the answers.

I'll also buy some fluid for the system so I can be sure that the fluid is enough.
I have read on your site how to bleed air from the system with turning the stearing wheel. Do I need to bleed some air on the valves at the aft? Or is it enough to perform the steering wheel action?

[Erich]

Usually it is enough to do the bleeding with the steering wheel. But the official way is according to Bentley Repair Manual different for the rear. Lift the rear of the car.... open the bleed valve at the regulating valve etc pp....
But that in my opinion only if you did some major repairs on the rear shocks so that air had a chance to enter. The fluid from the reservoir tank anyway has the circulating route pump>rear>regulating valve at rear axle>return line to reservoir>and it enters from left side wheel housing into engine room into the reservoir. So the air will come anyway to the reservoir. No need to bleed at the rear.

[Erlingur]

Zitat von Erich

Usually it is enough to do the bleeding with the steering wheel. But the official way is according to Bentley Repair Manual different for the rear. Lift the rear of the car.... open the bleed valve at the regulating valve etc pp....
But that in my opinion only if you did some major repairs on the rear shocks so that air had a chance to enter. The fluid from the reservoir tank anyway has the circulating route pump>rear>regulating valve at rear axle>return line to reservoir>and it enters from left side wheel housing into engine room into the reservoir. So the air will come anyway to the reservoir. No need to bleed at the rear.

Hi thanks for the answer,
OK this is an circulation system. Then I don't think that I'll need the rear bleeding.
I'm not in any major repairs. When I bought the car the former owner told me that the car had some work on the steering pump so I assumed that there could be some air problem at the aft. But it was made at an BMW service so I assume that the work is OK.


I'll at least try to adjust the ride hight according to your info. We'll see if that will work.
It was a quite shock to see that I could not use me new Rondell but after some surf on the bimmerboard, I saw that some adjustments could me made to the LAD. Thank god.