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How to replace the Air Reservoir tank
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furnitureman
 


Member Since: 30 Apr 2015
Location: Stoney Stanton, Leicestershire
Posts: 1529

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Lugano TealDiscovery 3
How to replace the Air Reservoir tank

This is my guide for replacing the air reservoir tank on a Discover 3.

Things you will need.

.1. New Air Tank,
.2. Four new M6 Bolts 20mm long and four lock washers
.3. WD40 or similar
.4. 10mm socket for existing bolts.
.5. Socket for new bolts mine were 13mm
.6. 12mm open ended spanner for voss air connector.
.7. Flat blade screwdriver.
.8. Hammer.
.9. Axle stands

First thing to do is go round with the WD40 on all the bolts for a week before as they are probably rusted in.

This is the order I did things but its just a guide.

.1. Start car and raise to off road height and if you have a iid tool vent the air from reservoir and put in build mode to stop it self leveling, once vented turn car off. (if you dont have an iid tool pull fuse F26 then undo the 12mm voss connector once you get to step no .6. slowly waiting for the air to vent before fully removing)

.2. Remove the air compressor cover and place axle stands under chassis.

.3. Undo the two 10mm bolts shown in the picture below at the front of the air tank I gave both a good tap with a hammer before attempting to undo them,


.4. Undo the two 10mm bolts shown in the picture below at the rear of the air tank again I gave a tap with a hammer first.


.5. I then used a screwdriver and prized open the plate at the rear where the tank was bolted on this will release the tang and you can then lower the air tank at the rear, whilst lowering (it will only drop 6" feed the air line over the body mount carefully there is enough slack to allow this)

.6. I then placed a axle stand under the rear of the air tank to take its weight and then undid the voss connector using the 12mm spanner and removed this and pipe from the air tank, dont forget to remove the colet and voss connector form the pipe.

.7. Next step is to lift the front of the air tank so the front tang is clear of its hole and extract the whole thing towards the rear of the car.

.8. next step get the new air tank and bolts ready for fitting.


.9. To fit keep the rear of the tank low and lift the front over its bolting plate then place the axle stand under the front and fit the air pipe into the voss connector making sure it goes almost upto the bulge on the pipe and pull back to make sure its it good and tight.

.10. Next step is to slowy lift the rear of the air tank carefully feeding the air line back over the body mount, at this stage the rear tang will eventually after a good push locate in the hole on the bolting plate.

.11. I then put the bolts in the front two holes and did up hand tight I put copper grease on the thread and used a lock washer.

.12. In the picture below im pointing to the tang i needed to bend this upwards so I could get enough clearance for the bolts , I then placed the screwdriver in the opening behind the captive nuts on the air tank and twisted clockwise this enabled me to get the two rear bolts in, I then tightened all bolts.


.13. I then started the car re-enabled the suspension and waited for the compressor to fill the tank, one full I sprayed soapy water on the voss connector and the pipe work I had moved to check for air leaks, last thing remove axle stand and replace compressor cover.

Hope this helps and if anyone spots a mistake or has feedback please post.
 Range Rover Westminster 4.4 TDV8 what a car
Discovery 3 HSE 2006 gone but never forgotten
Member of the 234,567 mile club😎
 
 
Post #173195910th Nov 2016 12:50 pm
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z1234567890
 


Member Since: 30 Nov 2015
Location: Dubai
Posts: 160

United Arab Emirates 2005 LR3 4.4 V8 HSE Auto Java BlackLR3

Good job Thumbs Up
  
Post #173208010th Nov 2016 6:21 pm
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John P
 


Member Since: 12 Aug 2011
Location: West Sussex
Posts: 1270

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Lugano TealDiscovery 3

Great write up. Thumbs Up I have a new tank in the garage which I'm about to fit. Just got to find the time. Rolling Eyes
  
Post #173244611th Nov 2016 4:50 pm
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Disgoeshere
 


Member Since: 06 Dec 2014
Location: North East
Posts: 278

United Kingdom 2007 Discovery 3 TDV6 SE Manual Cairns BlueDiscovery 3

Great stuff Thumbs Up Thanks for taking the time to do this well done fella.
 Andy

07MY (8A) D3 2.7 TDV6 Manual SE

New oil pump, water pump, cam belt - DM
New prop, new clutch TVLR,Beanie Grille,Black & Silver Badges
All Filters, oil change,clock on dash,4x4 info,RLD Protector,silicone hoses
Front and Rear TRW low Dust dtec V8 brake upgrade,new oil sump 
 
Post #173250711th Nov 2016 6:53 pm
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Alphamale
 


Member Since: 28 May 2014
Location: Belfast
Posts: 496

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Loire BlueDiscovery 4

Very good write-up furnitureman that will help a lot of others wanting to do the same.

Just couple of things I would add. It's worth giving the tank a couple of coats of stone chip before fitting and whilst the tank is out give the chassis there a good clean and also a couple of coats of stone chip.
   
Post #173260711th Nov 2016 10:34 pm
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furnitureman
 


Member Since: 30 Apr 2015
Location: Stoney Stanton, Leicestershire
Posts: 1529

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Lugano TealDiscovery 3

Good tip on the stone chip i was going to do this but had to change due to weekend away but i can take off and paint when i have a day spare.
 Range Rover Westminster 4.4 TDV8 what a car
Discovery 3 HSE 2006 gone but never forgotten
Member of the 234,567 mile club😎
 
 
Post #173378514th Nov 2016 1:09 pm
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Damomerlin
 


Member Since: 17 Dec 2017
Location: York
Posts: 106

United Kingdom 2006 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

Excellent guide will follow this in the morning
  
Post #19118607th Feb 2018 2:01 pm
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Damomerlin
 


Member Since: 17 Dec 2017
Location: York
Posts: 106

United Kingdom 2006 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

Brilliant guide fitted it today . Was an absolute nightmare to get bolts off . Finally found the best tool ever tho .... dremel with steel blade .cut bolts off in no time
  
Post #191325510th Feb 2018 7:19 pm
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DiscoJeffster
 


Member Since: 27 Feb 2016
Location: Perth
Posts: 204

Australia 2010 Discovery 4 3.0 TDV6 HSE Auto Nara BronzeDiscovery 4

What’s the reason for replacement? Are they rusting through/leaking?
  
Post #191331810th Feb 2018 11:48 pm
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Damomerlin
 


Member Since: 17 Dec 2017
Location: York
Posts: 106

United Kingdom 2006 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

Yep rusting and leaking so suspension drops
  
Post #191331910th Feb 2018 11:53 pm
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life - live it
 


Member Since: 14 Apr 2017
Location: Behind you
Posts: 1022

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Corris GreyDiscovery 4

How much is the part
  
Post #191332611th Feb 2018 1:45 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

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

also thought the write up was brilliant Thumbs Up

done the same and gave the new tank a few coats of dinotrol

did buy some irwin sockets as by christ it was a pain trying to get the old bolts out and they were a life saver

also replaced the new voss connector with a brass pushfit, found it alot easier
   
Post #191333111th Feb 2018 2:16 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

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

Taggart wrote:
How much is the part


think i paid around £100 for mine
   
Post #191333211th Feb 2018 2:17 am
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defector
 


Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1419

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Took mine off, wire brushed with the angle grinder and 2 coats of Hammerite smooth.
Hopefully good for a few more years.
  
Post #191333311th Feb 2018 3:20 am
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Martin
Site Admin and Owner 


Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18440

United Kingdom 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

A tank cost me £86 inc VAT from Duckworth back in October Thumbs Up
 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know! 
 
Post #191334411th Feb 2018 7:48 am
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