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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver
2004 4.4 V8 Front air bag replacement-How to depressurise ?

My drivers side front air bag was split so I've replaced that this morning without having to depressurise the system first. I've now gone to change the front passenger side and can't find any cross link valve behind the drivers side wheel arch liner ! How do I release the pressure so I can remove the passenger side strut ?

Post #451834 23rd Sep 2017 2:08pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1350

2015 Range Rover Autobiography SDV8 Aruba

stab it. You're replacing it anyway ... Rolling with laughter

Cant you just press down on the airline collar and release the airline from the strut ? All the air will come out then. It'd depressurise in no time. No worse than pressing in the valve of a tyre really. V8 or else ...

Post #451837 23rd Sep 2017 2:29pm
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

You can't get to the air line connection on the top of the strut without dropping the strut down first. Can you remove the strut while it's still pressurised and then release the air from the air line connection or do you have to release the pressure first ?

Post #451838 23rd Sep 2017 2:32pm
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

So the answer is yes you can remove the strut with it still pressurised. Lower it down enough to access the air line at the top of the strut, slowly undo the nut until air starts coming out slowly then wait for the strut to depressurise.

Post #451845 23rd Sep 2017 3:18pm
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Zebedee



Member Since: 09 Jun 2016
Location: Cheshire/South Manchester
Posts: 377

United Kingdom 2013 Range Rover Vogue SDV8 Santorini Black

Another way is to gently undo the air line where it connects into the valve just behind the o/s front wheel arch liner. Current:
- 2017 L405 3.0 V6 Autobiography
Sold:
- 2013 L405 4.4 TDV8 Vogue
- 2004 L322 4.4 Vogue (BRC LPG)
- 2002 L322 4.4 HSE (having fixed timing chain guides)
- 2000 P38 4.6 Vogue (BRC LPG)
- 1981 2-door In-Vogue
- 1980 Ex-Army SIII LWB
- 1976 SIII LWB
- 1968 SIIA
Stripped for parts:
- 2003 L322 4.4 Vogue

Post #452178 26th Sep 2017 6:58pm
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

Well as I found out while doing this job, the later models don't have any valve behind the o/s wheel arch liner!

Post #452179 26th Sep 2017 7:01pm
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holidaychicken



Member Since: 06 Nov 2013
Location: Kent
Posts: 1086

United Kingdom 2004 Range Rover Vogue 4.4 V8 Java Black

Correct, I found that out too Smile
Another thing to note is on dunlop struts the airline connector on the strut is not designed to be unscrewed as it is a push fit connector. You can unscrew them but they may not tighten up again, one of mine did , one didn't and when I complained island 4x4 said to not undo it numpty - fair comment. (They didn't say that exactly but I know they were thinking it)

Post #452183 26th Sep 2017 7:29pm
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Zebedee



Member Since: 09 Jun 2016
Location: Cheshire/South Manchester
Posts: 377

United Kingdom 2013 Range Rover Vogue SDV8 Santorini Black

Ah....

How do the later ones balance pressure between each side and front to back if it doesn't have the valves, I wonder. Current:
- 2017 L405 3.0 V6 Autobiography
Sold:
- 2013 L405 4.4 TDV8 Vogue
- 2004 L322 4.4 Vogue (BRC LPG)
- 2002 L322 4.4 HSE (having fixed timing chain guides)
- 2000 P38 4.6 Vogue (BRC LPG)
- 1981 2-door In-Vogue
- 1980 Ex-Army SIII LWB
- 1976 SIII LWB
- 1968 SIIA
Stripped for parts:
- 2003 L322 4.4 Vogue

Post #452250 27th Sep 2017 2:31pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1350

2015 Range Rover Autobiography SDV8 Aruba

Maybe that is done at the valve block by the tank. V8 or else ...

Post #452279 27th Sep 2017 5:15pm
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holidaychicken



Member Since: 06 Nov 2013
Location: Kent
Posts: 1086

United Kingdom 2004 Range Rover Vogue 4.4 V8 Java Black

Each corner still has it's own valve looking at the diagram and the front cross link valve operation is described below. The cross link valve was removed and replaced with a connector and so i imagine in the absence of the cross link valve the heights are just controlled by the ECU ?


Click image to enlarge






Post #452285 27th Sep 2017 5:42pm
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

holidaychicken wrote:
Correct, I found that out too Smile
Another thing to note is on dunlop struts the airline connector on the strut is not designed to be unscrewed as it is a push fit connector. You can unscrew them but they may not tighten up again, one of mine did , one didn't and when I complained island 4x4 said to not undo it numpty - fair comment. (They didn't say that exactly but I know they were thinking it)


Really ? Well I fitted Dunlop struts and every guide I read said to remove the new air line fittings from the struts and just screw in the originals still on the air line.

They all said not to remove the old air line fittings from the air line unless they were leaking.

Post #452311 27th Sep 2017 8:08pm
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holidaychicken



Member Since: 06 Nov 2013
Location: Kent
Posts: 1086

United Kingdom 2004 Range Rover Vogue 4.4 V8 Java Black

This is the email reply from Island

One thing is very important. The brass union should not be removed. This is a push fit fitting and is not designed to be removed.

Remove the brass fitting voids any warranty. The correct fitting procedure is:-

Remove the brass fitting from the old strut (as the strut is now no longer needed)
Remove the collet and brass nut from the pipe
Cut pipe back 5mm to remove any scratches
Push the pipe into the brass fitting on the new strut

Post #452323 27th Sep 2017 10:49pm
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

I bought my Dunlop struts from LR Trade Parts and they came with no instructions for fitting at all. Every guide and video I looked at before doing the job said not to remove the original air line fittings from the air lines and to just screw them back into the new struts.

Why would removing the air line fittings from the new struts void any warranty ?

Post #452324 27th Sep 2017 10:58pm
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holidaychicken



Member Since: 06 Nov 2013
Location: Kent
Posts: 1086

United Kingdom 2004 Range Rover Vogue 4.4 V8 Java Black

Maybe they are different now but I think mine were plastic or screwed into plastic and bonded in although cant remember for certain but I took them out of the new struts as I think I was intending to screw the old ones straight in but then decided to use the new ones and only one would tighten fully and one behaved a bit like it was stripped but remained air tight but when I questioned it I got the reply. This was about 4 years ago I think so memory a bit fuzzy.

Post #452327 28th Sep 2017 2:56am
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Siclark



Member Since: 05 Jun 2017
Location: Gloucestershire
Posts: 40

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Zambezi Silver

The new air line fittings on my Dunlop struts were white plastic with a brass nut on. They unscrewed really easily.

Even the wiki guide on this site tells you not to remove the old air line fittings from the air line and to just screw them into the new strut.

I did some searching earlier and did come across some people saying you shouldn't remove the new air line fitting from the new strut. They were saying to cut the old air line fitting off and then to just push the air line into the fitting on the new strut so I know where you're coming from.

I don't know if the design has changed since you changed yours but all I can say is the Dunlop fittings unscrewed really easily and I had no problems screwing the old air line fittings into the new struts.

Post #452365 28th Sep 2017 4:29pm
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