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Air Suspension Question
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Young
 


Member Since: 06 Mar 2007
Location: Sydney
Posts: 62

Australia 2007 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3
Air Suspension Question

I park my disco in the garage which requires it to be put in access mode. The suspension lowers even further over time. I decided to check it by leaving it out in off-road heigh mode. After four days of no driving, the suspension slowly has lowered by 6cm all round already. Is this a leak or the compressor that is failing.

I have noticed that the compressor runs for a long time on start up generally. My mechanic says it is the compressor that is failing? Help
  
Post #178246923rd Feb 2017 10:46 am
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

If it sinks over time, there is a leak. I often leave mine in access mode. It doesn't change in a week.
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #178247223rd Feb 2017 10:58 am
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Biffysun
 


Member Since: 09 Jul 2011
Location: Central
Posts: 1786

Scotland 2016 Discovery 4 3.0 SDV6 SE Tech Auto Corris GreyDiscovery 4

If its sinking overnight you have a leak, the compressor may indeed be failing if it has to constantly top up the air tank, check for leaks before replacing compressor Thumbs Up
  
Post #178248623rd Feb 2017 11:22 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

not the compressor.

change seals in the valve blocks.

£19 on ebay UK
  
Post #178251223rd Feb 2017 12:28 pm
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garrycol
 


Member Since: 06 Dec 2010
Location: Canberra
Posts: 1114

Australia 

Not necessarily leaks (but probably is). How is your battery - in good condition?

When my battery started failing the suspension started dropping over night - obviously something in the system relies on battery power.

The suspension dropping stopped as soon as the battery was replaced.
  
Post #178292924th Feb 2017 12:11 am
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rogc
 


Member Since: 02 Sep 2015
Location: Kent
Posts: 64

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Unknown ColourDiscovery 3

Check the compressor drier cap with soapy water when the compressor is running, as they sometimes split between the two pipe connections.
As for the valves this kit on ebay http://www.ebay.co.uk/itm/272213142557?_tr...EBIDX%3AIT
should do the trick, front and reservoir valves are really easy to access, the rear valve is an absolute **** so would advise fitting a new valve, as the time taken to remove and replace outweighs the cost of refurbishment.
The reason the valves fail is due to the desiccant in the drier breaking down, refurb kits for the drier including new dessicant and filters can again be found on ebay. http://www.ebay.co.uk/itm/For-Land-Rover-D...SwnDxUb36H If you overhaul or change the blocks without resolving the root cause the issue will reoccur in a short period of time.
When rebuilding the valve blocks, use a smear of silicon grease on the O rings, it helps them seal.
  
Post #178294824th Feb 2017 6:23 am
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