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DISCO4.COM > Faults & Fixes (D4)

Air suspension - Valve block
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jackvoyager
 


Member Since: 02 Oct 2020
Location: UK
Posts: 35

United Kingdom 2012 Discovery 4 3.0 TDV6 HSE Auto Bonatti GreyDiscovery 4
Air suspension - Valve block

Today I looked at the valve block, because from time to time it showed that I had a suspension failure.
I removed both front and rear.
I took some photos.

Front Valve


Real Valve


This is what they look like inside
  
Post #232652813th Feb 2023 5:16 pm
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adm013
 


Member Since: 15 Nov 2015
Location: Western Isles
Posts: 25

Scotland 2015 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

You can buy replacement o-rings online for them. Just did all mine recently while tracing an inssue, fairly straightforward.  
Post #232654313th Feb 2023 6:36 pm
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TST717
 


Member Since: 19 Oct 2014
Location: Inverness
Posts: 2

I have a similar intermittent message and I suspect something similar may be the issue .... were the valves hard to access & remove?  
Post #236480220th Mar 2024 6:50 am
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jackvoyager
 


Member Since: 02 Oct 2020
Location: UK
Posts: 35

United Kingdom 2012 Discovery 4 3.0 TDV6 HSE Auto Bonatti GreyDiscovery 4

Hi.
There are practically no difficulties at the front.
To unscrew the rear pneumatic lines, you need a 12 mm open-end wrench (short) and some effort.  
Post #236481420th Mar 2024 10:48 am
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pjm-84
 


Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2589

Ukraine 

Push fit connectors a must when replacing. Makes the removal of the rear a 5min job.

Never did well with the rebuild O rings and ended up replacing the valve blocks.  
Post #236481820th Mar 2024 11:57 am
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Trickysummer
 


Member Since: 23 May 2016
Location: Maidenhead
Posts: 19

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

I had a slow air leak on my ‘12 D4 a few years back, resulted in the compressor burning out, after replacing that I also changed the front air junction box, as I recall it was a very easy 15 min job & it’s been fine since. The rebuild option for me wasn’t worth the time or risk of not being sure it was fully air tight.  
Post #236515725th Mar 2024 8:59 pm
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