Suspension problems after compressor and front structs replacement

[Paul Albert]

I have replaced the front air structs and valve block, the rear valve block, the compressor and I pulled the leveling fuses and the suspension still bottoms on all 4 wheels.
Could the center compressor reservoir valve block be the problem?
Where could it still be leaking?
When I start the engine all 4 structs immediately inflate.
The rear structs deflate first then the new Arnott front structs deflate last
Any ideas?
The suspension trouble light does not come on
Very frustrated!!

 

[maxx4wd]

Yes the center valve block could be the problem but since you state that the rears deflate first I would look at that rear valve block. Sounds like what my front was doing about 2 years ago. The problem I had was the valve block was leaking back into the tank so it was an issue with the oring seal within the valve and not an airbag etc. I solved it by rebuilding the valve block with a new set of o-rings (you could replace the valve block as well but sounds like you just did that so the o-ring pack is very cheap and fairly easy to install...the hard part is getting that rear block out and back in.)

 

[serge1060]

Where did you buy the O rings? Can you send me the link pls! I’m planning to rebuild the front air block.
Another possible issue with slow leaking are the air block terminals. I noticed the small terminal pipes are not flared at the end. Just like the HVAC terminal connectors, the pipes are flared to seal and prevent unnecessary air leak. Maybe somebody from the forum can comment on this.

 

[denochs]

I too would like to know where to get the o ring rebuild kits. Having same issue on my 07 LR sport.

 

[serge1060]

Hi, I bought new Air Suspension Valve Block Front Repair O Ring Seal Kit from eBay today for $19.

 

[maxx4wd]

I used this one but sure its about the same as anywhere else.

https://www.britishpartsofutah.com/Range-Rover-Sport-LR3-LR4-Valve-Block-Seal-O-Ring-p/rcrvhk.htm