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  #1  
Old 09-29-2007, 09:16 AM
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Self Leveling System fine -then suddenly too high..

Hi there,

I have read a lot about the SLS system on this forum and at other sites. I have a quite good understanding of the functionality etc.

I just installed a new connection rod on my 320TE (w123). Pump is working, there are no leaks that I can find anywhere and fluid level is fine.

After adjusting the height level with the engine running, I thought everything was just fine. I drove for a while (about 5 km). Then after returning to the car several hours later, it starts jumping up and down in the rear end. Now the rear end is suddenly raised way too high!

I am thinking, that maybe the valve needs repair/replacement..

Will a bad valve let too much hydraulic oil through and cause the system to raise too high?

Thanks,

Ronald, Denmark

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  #2  
Old 09-29-2007, 10:00 AM
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A stuck valve might do that, but it's probably not bad. Bad valves leak internally so that the car sags after sitting for a while. Check the linkage (again) and the sway bar links. One or more of these may have come loose or broken.
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  #3  
Old 09-29-2007, 10:13 AM
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Thanks OldPokey,

Glad to know, that my valve might be ok

Excuse me, but my vocabulary in tech-words is not very good (I am danish). What exactly is the 'linkage' and the 'sway bar links'?

My arm on the valve is not a part of the valve, but can be turned 180 degrees before fastened with a tightening bolt, and then I can also adjust the other 'arm' that reacts on the rear weight.

Thanks,

Ronald
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  #4  
Old 09-29-2007, 10:32 AM
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IIRC there is a valve on the body with an arm that attaches to the suspension arm. When there is a load the arm activates the valve to provide more pressure in the system to lift the rear. If this arm link fell off you might have such an event. I think they sometimes also seize with rust.

Tom W
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  #5  
Old 09-29-2007, 12:41 PM
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Here is what the sway bar link looks like:

http://tinyurl.com/2mqmst

And here is the pull rod you just replaced:

http://tinyurl.com/2q7py4

If any of these parts is broken, loose or otherwise damaged your car's ride height will be affected.
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  #6  
Old 09-29-2007, 12:56 PM
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Thanks again.

Bu t there is a problem with the url to the pictures. It redirects to a place that does not exist...
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  #7  
Old 09-29-2007, 02:18 PM
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It happened to me, same symptom on a 600SEL W140 and many times on 560SEL W126. They are almost all the same system. What I did is that I readjusted the rear hydraulic valve and it worked fine. Sometimes you need to adjusted many times so you make sure that there is no air in the oil stream.
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380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
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  #8  
Old 09-29-2007, 03:01 PM
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Hey zcc. That is good news! I will give it a try again.

Two additional questions:

1. The system is self-bleeding, right? So I guess that I do not have to bleed anyting (I opened tha valve and there was immediately soming fluid out)

2. Isn't the sls system supposed to be correctly set, if you can put a wire through some holes that are alligned (haven't done it yet...)

/Ronald
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  #9  
Old 09-29-2007, 04:08 PM
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Arrow

Quote:
Originally Posted by istedgade View Post
1. The system is self-bleeding, right? So I guess that I do not have to bleed anyting (I opened tha valve and there was immediately soming fluid out)/Ronald
As for my information no, it's not self-bleeding.

Quote:
Originally Posted by istedgade View Post
2. Isn't the sls system supposed to be correctly set, if you can put a wire through some holes that are alligned (haven't done it yet...)/Ronald
I don't know but I don't think so.
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Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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  #10  
Old 09-29-2007, 04:23 PM
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OK. Thanks again. I will get back to this forum in the beginning of the week and post back if the problem was solved.
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  #11  
Old 09-30-2007, 04:09 PM
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I found you some useful information here:
http://www.peachparts.com/shopforum/tech-help/63511-urgent-self-levelling-help-required.html#post1633531
Thanks OldPokey.

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Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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