Rear side sagging.
07-04-2016, 01:56 PM
#1
Member
Thread Starter
Rear side sagging.
My 2005 S55 AMG rear side ( rear both wheels) started sagging when parked for a week or less from few weeks ago.
After searching forum I realized that the rear valve could be a problem. So, yesterday I removed the rear valve black and checked. It was completely cleaned and o-rings were very good condition. So I reassembled and re-installed. So, I do not think the valve block has problem.
I will wait few days if it still sags. There is no leak at all anywhere and from Xentry system it shows pressure steady 185-190.
Does the rear accumulator also make sag when if fails ? I do not have any warning sign when run over bump at all.
Could you advise me what else I need to check?
Sun
After searching forum I realized that the rear valve could be a problem. So, yesterday I removed the rear valve black and checked. It was completely cleaned and o-rings were very good condition. So I reassembled and re-installed. So, I do not think the valve block has problem.
I will wait few days if it still sags. There is no leak at all anywhere and from Xentry system it shows pressure steady 185-190.
Does the rear accumulator also make sag when if fails ? I do not have any warning sign when run over bump at all.
Could you advise me what else I need to check?
Sun
Last edited by bigmyself; 07-04-2016 at 02:38 PM.
07-04-2016, 10:50 PM
#2
Junior Member
Sounds identical to mine ,both sag randomly ,im at 166k miles ,and pretty much their old bags and not practically new imo ,there are no leaks at all and no malfunction ,i did replace my front passenger side because it sagged very low when parked.
When my mechanic replaced it for a arnott performance strut that old one was toast ,it had leak ,however it did gave a code for the valve being closed but functioning,its supposibly a software update issue.
When my mechanic replaced it for a arnott performance strut that old one was toast ,it had leak ,however it did gave a code for the valve being closed but functioning,its supposibly a software update issue.
07-08-2016, 07:48 AM
#3
Member
Thread Starter
Update!
I removed the ABC valve block and checked again, specailly shut-off valve. It was completely cleaned and no dirt at. So, I replaced all o'rings using purchased from this site below.
Also, I removed checked rear pressure accumulator. It looked liked perfect condition. I inserted a screw driver into the connection area and compared how deep it went. It was the same depth with the brand new one I purchased yesterday. Anyway this accumulator was the original aged about 11-12 years old and close to end of life, so i replaced.
Result!
Spent overnight with new orings, no signs of sagging at all.
New o'rings seal pretty good.
http://www.theoringstore.com/index.p...oducts_id=7497
I removed the ABC valve block and checked again, specailly shut-off valve. It was completely cleaned and no dirt at. So, I replaced all o'rings using purchased from this site below.
Also, I removed checked rear pressure accumulator. It looked liked perfect condition. I inserted a screw driver into the connection area and compared how deep it went. It was the same depth with the brand new one I purchased yesterday. Anyway this accumulator was the original aged about 11-12 years old and close to end of life, so i replaced.
Result!
Spent overnight with new orings, no signs of sagging at all.
New o'rings seal pretty good.
http://www.theoringstore.com/index.p...oducts_id=7497
