Another ABC question; Suspension dropping in the rear only when cold outside
Thread Starter
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,559
Likes: 79
2015 Challenger Hellcat, 2023 Ram 3500, 2005 E55 Wagon, 2019 GLC63s
Another ABC question; Suspension dropping in the rear only when cold outside
I have noticed that if I park my car for over 24hrs the rear drops. I started noticing this when it started getting cold out side around the -5 degree's C. Is this normal? It doesn't drop when I park it at work for 8+ hours in a heated underground parkade. So is this normal? I have had the pump replaced and one of the high pressure hoses along with the filter in the past 1000miles.
R.K.
R.K.
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
The seals in your rear valve block are going. It will start doing it in the warm weather too at some point.
If you look carefully you will notice that it actually sags on one side more and the other follows.
Try leaving the car in the middle or topmost suspension height position and see if it makes a difference.
If you look carefully you will notice that it actually sags on one side more and the other follows.
Try leaving the car in the middle or topmost suspension height position and see if it makes a difference.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,559
Likes: 79
2015 Challenger Hellcat, 2023 Ram 3500, 2005 E55 Wagon, 2019 GLC63s
The seals in your rear valve block are going. It will start doing it in the warm weather too at some point.
If you look carefully you will notice that it actually sags on one side more and the other follows.
Try leaving the car in the middle or topmost suspension height position and see if it makes a difference.
If you look carefully you will notice that it actually sags on one side more and the other follows.
Try leaving the car in the middle or topmost suspension height position and see if it makes a difference.
Thanks for the response. I have a lowering module installed as well if that makes a difference. Also I have the suspension setup on comfort mode vs sport. Does that make a difference as well?
So if the seals are going in the rear valve block, do I have to replace the whole block; the one that feeds the front and the rear or is there a rebuild kit for the rear? How much is one of those valve blocks?
R.K.
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
Comfort or sport, lowering module.., does not matter. It is the valve block. About $1500 give or take. Plus 10 quarts of pentosin and about 6 hours of labor. There is an updated valve block part number. Make sure you get it.
There are two valve blocks. One in the front and one in the back. The rear is a ***** to take off.
There are two valve blocks. One in the front and one in the back. The rear is a ***** to take off.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,559
Likes: 79
2015 Challenger Hellcat, 2023 Ram 3500, 2005 E55 Wagon, 2019 GLC63s
Comfort or sport, lowering module.., does not matter. It is the valve block. About $1500 give or take. Plus 10 quarts of pentosin and about 6 hours of labor. There is an updated valve block part number. Make sure you get it.
There are two valve blocks. One in the front and one in the back. The rear is a ***** to take off.
There are two valve blocks. One in the front and one in the back. The rear is a ***** to take off.
Thanks.
R.K.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,559
Likes: 79
2015 Challenger Hellcat, 2023 Ram 3500, 2005 E55 Wagon, 2019 GLC63s
Just wanted to update this thread. I recently went and started the car up (was working on fixing my voice control system) and raised the car up (it had totally sat down as it hasn't been driven for over a month). I have noticed that over the past three days the rear hasn't sunk at all as compared to before. I'm just wondering if it was a air bubble or something stuck in the valve block that was allowing the rear to sink after a day. I'm getting some more hoses replaced in the spring for the ABC system so they will have to Rodeo the car again.
R.K.
R.K.
