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D4 Air Suspension - Maintenance
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10840

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4
D4 Air Suspension - Maintenance

I know I will be ribbed for asking this question; and it will be pointed out that I am obsessive about (preventative) maintenance - so be it Whistle

I can't see any reference to maintenance of the D4's air suspension in JLR schedules, maybe I have missed it?

I have however noticed that it has been suggested that the suspension benefits from maintenance, in particular:-

1. Changing the desiccant and filters; and

2. Maintaining/servicing the compressor.

At what mileage/age should this be done, and what is involved in 2 above?

TIA

NJSS
  
Post #23209192nd Jan 2023 9:36 am
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Oxford-boy
 


Member Since: 07 Sep 2015
Location: Oxford
Posts: 1122

United Kingdom 2014 Discovery 4 3.0 SDV6 XXV LE Auto Causeway GreyDiscovery 4

HNY to you.

I cannot assist on 1. but in terms of 2., the compressor, mine has just failed and been replaced at 8 years 6 months old and 80k miles. Moderate use of suspension and average to above average towing usage.

Therefore I think servicing the compressor before then might help to give your timescale some context. What needs doing with a compressor service is something for others.

Wasn't a cheap item but WD (old one) made it bearable..
 Jim

2014 Discovery 4 XXV SDV6 Causeway Grey
2016 Discovery 4 HSE Lux SDV6 Loire Blue - now gone 
 
Post #23209272nd Jan 2023 10:39 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10840

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Thanks Jim Thumbs Up

Hopefully someone will be able to advise on (preventative) maintenance Whistle

I am surprised that there appear to be no JLR recommendations.

NJSS
 

Last edited by NJSS on 3rd Jan 2023 8:19 am. Edited 1 time in total 
Post #23210393rd Jan 2023 7:42 am
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LT
 


Member Since: 31 Dec 2005
Location: South West
Posts: 23866

United Kingdom 2016 Discovery 4 3.0 TDV6 Landmark LE Auto Santorini BlackDiscovery 4

Nige, i know that you use your D4 off road. I used to take off the compressor covers and clear out all the muck.

The noise/vibration deadening material is sponge like and seems to be almost permanently wet. Which apparently is nothing to worry about.

If you haven’t done this, you might find a surprisingly large amount of mud/dirt.
 2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
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Post #23210403rd Jan 2023 8:05 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10840

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Thanks Tom

I tend to do as you suggest in the Summer, when it's warmer to work under one's car Embarassed

I am surprised that no one has any other ideas for routine maintenance, or suggestions at what mileage/age one should change the desiccant and filters.

NJSS
  
Post #23211063rd Jan 2023 3:25 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 14176

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Must confess like ur good self the only thing I found was the following from the workshop manual

Air Suspension

1. Every 5 years or 75,000 miles (120,000 km) - Vehicles operating under arduous conditions: Replace air suspension compressor filter. For additional information, refer to Air Suspension Air Filter (204-05 )

So I wonder if the dryers desiccant should be replaced/ checked every 2-3 years or with the gaps iid live data if monitoring the air compressors motor temperature along with the air compressors pressure as I would assume as the desiccant material becomes blocked the motor temperature would rise and air pressure reduced

Apologises as know that’s not really much help

Ps, think the data is for a hitachi compressor


   
Post #23211153rd Jan 2023 4:28 pm
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Moleshome
 


Member Since: 15 Oct 2020
Location: Wokingham
Posts: 412

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Yulong WhiteDiscovery 4

Is that the air filter behind the near side panel in the boot?

?t=525
  
Post #23211203rd Jan 2023 5:17 pm
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VVS210
 


Member Since: 05 Aug 2015
Location: Hampshire
Posts: 509

England 2010 Discovery 4 3.0 TDV6 GS Auto Stornoway GreyDiscovery 4

Had to replace my drier about 2 years ago, so circa 120k miles and 10 years old, due to repeated suspension faults coming up.

As suspected there was a crack in the cap on the top of the drier unit between the two air lines. I bought a second hand 'donor' unit from a scrapyard and a refurbishment kit online then rebuilt the donor drier unit with new filters and desiccant before doing a simple swap over. Desiccant was all clumpy and had degraded so clearly due for replacement.

Still got the rest of the donor unit and all the parts to refurbish the pump itself but so far not required them 🤞
 D4 - Stornoway Grey
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Post #23211313rd Jan 2023 6:48 pm
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kevofcov
 


Member Since: 06 Nov 2007
Location: Other end of M69
Posts: 571

England 2016 Discovery 4 3.0 TDV6 Graphite LE Auto Java BlackDiscovery 4

NJSS wrote:
Thanks Jim Thumbs Up

Hopefully someone will be able to advise on (preventative) maintenance Whistle

I am surprised that there appear to be no JLR recommendations.

NJSS



From my investigations no routine checks or preventative maintenance possible hence not detailed by LR;

AMK type
The main issue is piston ring wear. Over time wear in the ring reduces the ability to compress air in the chamber. It becomes less efficient with use and so has to work harder, which speeds up wear.... They can be changed put is a repair.
The only other item of wear are the motor bushes. Last a long time but again no routine action possible. Replace when worn out.

Hitachi type
No experience with this type but I’m saying it is the same situation as the AMK
  
Post #234745910th Sep 2023 8:29 am
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Weyboat
 


Member Since: 13 Apr 2018
Location: Weymouth
Posts: 274

England 2015 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Just by the filtration kit from 4x4airseals.com and follow the instructions in this youtube video.
 Gone 2016 Landmark D4
Current 2015 HSE D4 - AKA - 'Gandalf the Grey' 
 
Post #234746910th Sep 2023 10:41 am
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