Member Since: 02 Dec 2020
Location: Southampton
Posts: 82
Air suspension leak
Hi I have a 2011 D4
My front n/s drops I have removed the fuse to test this and I have sprayed all four air bags and the valve block with soapy water but not detected any leaks the compressor working fine as the suspension goes up and down when needed.
I have run out of ideas and wondered if anyone has any tips please
Thank you very much for your help in advance
2nd Jan 2022 1:09 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
If your front n/s airbag is not leaking, and also not the airline…suspect a leaky O-ring inside the front valve block…
Kits are available rather cheap, though never seen the valve seats with them and these could be in need of attention too imho..
You can take a look first… it is not a difficult part (the valveblock)Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
2nd Jan 2022 1:45 pm
Dazzer34
Member Since: 02 Dec 2020
Location: Southampton
Posts: 82
Thank you I have sprayed the valve block but still no air leaking so think that’s the best place to start
2nd Jan 2022 2:52 pm
Justme
Member Since: 09 Aug 2015
Location: Pwllheli North Wales
Posts: 104
When you pulled the fuse does it stay up?
3rd Jan 2022 1:24 am
Dazzer34
Member Since: 02 Dec 2020
Location: Southampton
Posts: 82
No the front left side drops
3rd Jan 2022 10:14 am
Justme
Member Since: 09 Aug 2015
Location: Pwllheli North Wales
Posts: 104
Then its a leak in:-
Air bag
Pipe to air bag
Valve controlling air bag.
3rd Jan 2022 10:19 am
Dazzer34
Member Since: 02 Dec 2020
Location: Southampton
Posts: 82
I have sprayed the airbag and pipes with soapy water and it doesn’t detect any leaks I did this in off road mode too
3rd Jan 2022 10:43 am
Justme
Member Since: 09 Aug 2015
Location: Pwllheli North Wales
Posts: 104
Did you spray the top of the suspension?
Also all round the front valve block?
Less likely its allowing air back though the front valve block but worth following the air lines back checking every part.
It must be leaking even if you cant find it
For the cost of an O ring kit I would start there first.
3rd Jan 2022 10:52 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1807
Remove front valve block and refurbish it with a kit. Whilst apart, make sure all little valves slide in their tubes. All three of mine where stuck. I cleaned the block with brake cleaner and also the valves. I then used silicon spray on the valves to make sure the slide up and down easily. Make sure you assemble it correctly, middle valve is different. Put all valves in solenoid side first then add the base to it, this is so you do not screw up the orange "O" rings. The base can go on either way, the correct way is to have the two screw in connectors at the opposite end to the power connection.
5th Jan 2022 3:00 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1807
seems the system posted twice
5th Jan 2022 3:01 am
d_3_54
Member Since: 10 Jun 2021
Location: United Kingdom
Posts: 8
air suspension fault
Hello
can anyone tell me where the air supply pipe connected to the front block is connected at the compressor end. Looking to run a new pipe under the car to isolate slow air leak. changed front block, sprayed all accessible areas without joy. cheers
30th Jun 2022 10:32 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13996
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