Help Support Bigcoupe.com

635 self leveling question

Post in this forum for topics relating to suspension, steering, and brakes

Moderators: ron, bfons, GRNSHRK

Post Reply
Ericjump
Posts: 18
Joined: Tue Dec 24, 2019 10:15 pm
Location: USA - South Carolina

635 self leveling question

Post by Ericjump » Wed Mar 18, 2020 11:30 pm

I just bought a 89 635, it still has the self leveling rear suspension. Everything appears to be in place but there is no fluid in the tank and I can’t hear the pump running, Can someone
Give me some troubleshooting help on that system, thanks in advance!

User avatar
Ralph in Socal
Bigcoupe supporter
Posts: 2349
Joined: Tue Apr 14, 2009 3:32 am
Location: High Desert of SoCal

Re: 635 self leveling question

Post by Ralph in Socal » Sun Mar 22, 2020 6:17 pm

Are there any hoses connected to the rear shocks? Is the rear end of the car sagging?

If both no then it has been mechanically eliminated.

If both yes, I would have a tendency to eliminate and go to conventional suspension

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)

emac
Posts: 43
Joined: Thu Feb 06, 2020 2:57 am
Location: SC

Re: 635 self leveling question

Post by emac » Wed Mar 25, 2020 12:17 pm

Do a google search and look for hits on the e28 m5 forums. Should be some troubleshooting threads. As I recall from the e28 m5 I had, if the pressure canisters fail you can lose fluid and the car will constantly hunt for height. I replaced them and filled it with fluid and it worked fine. I thought it was a cool system. My M6 had it removed by the PO.

Also, there is a link on the rear sway bar that activates the system. You coud try and fill it with fluid and activate that lever and see what it does or see if power goes to the motor. CHeck fuses.

Ericjump
Posts: 18
Joined: Tue Dec 24, 2019 10:15 pm
Location: USA - South Carolina

Re: 635 self leveling question

Post by Ericjump » Thu Mar 26, 2020 11:54 pm

What kind of fluid?
Yes, everything is still in place
Thanks

psdejong
Posts: 5
Joined: Thu Apr 04, 2019 10:18 pm
Location: landrum sc, usa

Re: 635 self leveling question

Post by psdejong » Fri Mar 27, 2020 1:09 am

I have a 1988 M6. Under the trunk below the car , the link off the swaybar connects to a little box, the size of a package of cigarette. It is easy to remove. I don;t remember exactly what was wrong. I think a soldering joint was bad. See picture.
As far as the fluid, a light hydraulic oil should be fine.

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests