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D4 coolant change - tricky to bleed or ok?
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pagoda
 


Member Since: 13 Aug 2009
Location: Not London Anymore
Posts: 1842

United States 2016 LR4 3.0 SDV6 Landmark LE Auto Yulong WhiteLR4
D4 coolant change - tricky to bleed or ok?

My D4/LR4 SCV6 is 4 and I'd like to change the coolant. I haven't done this before on the D4 and have read (other US forums) of woes relating to bleeding, etc.

I don't have an air compressor (but am seriously thinking about purchasing) so wondered if it's relatively easy to do using gravity, etc. Or I take to my indy (who I assume does use air) and pay him to do it.

Finally, is the D4/LR4 maint manual anywhere? I have the D3/LR3 one.

Thoughts?

Thanks.
 PAGODA  
Post #218812119th Nov 2020 4:01 pm
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Flack
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Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 5697

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Just pre mix it and then start the car, then slowly pour it in until you reach the level, unless there is a problem in the system all should be well.
If your not quite sure just try bleeding it from the relevant places..

Flack Thumbs Up
 
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Post #218813519th Nov 2020 5:04 pm
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pagoda
 


Member Since: 13 Aug 2009
Location: Not London Anymore
Posts: 1842

United States 2016 LR4 3.0 SDV6 Landmark LE Auto Yulong WhiteLR4

Thanks, Flack. Sounds simple enough.

Where's the best place to drain? Is there a plug (I'm loathed to use plugs from nightmarish experiences with classic cars resulting in full radiator rebuilds) or a bottom hose to pull off?

Grateful for your advice.
 PAGODA  
Post #218814719th Nov 2020 5:48 pm
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Kilovolt
 


Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 688

United Kingdom 2013 Discovery 4 3.0 SDV6 Commercial XS Auto Baltic BlueDiscovery 4
Re: D4 coolant change - tricky to bleed or ok?

pagoda wrote:
Finally, is the D4/LR4 maint manual anywhere? I have the D3/LR3 one.


From a previous post, this link appears to still work. For a slightly older model but still D4 Thumbs Up

https://www.mediafire.com/folder/5mhvubw2bens1/Dis4

https://www.disco4.com/forum/lr4-manuals-d...p;start=15

Cheers.
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Post #218825520th Nov 2020 8:18 am
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teddy
 


Member Since: 22 Jul 2017
Location: suffolk
Posts: 51

United Kingdom 2009 Discovery 4 3.0 TDV6 HSE Auto Ipanema SandDiscovery 4

I drained coolant in my MY10 D4 from the gearbox cooler as it was slightly easier to get at.

When filling, there are 2 bleed points which you can access with the engine cover off. Fill as much as possible with the engine off to start then I started the engine and kept filling with bleed screws open until they leaked, then just filled to the full line on the expansion tank.

It was surprisingly simple.
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Post #218831820th Nov 2020 12:05 pm
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pagoda
 


Member Since: 13 Aug 2009
Location: Not London Anymore
Posts: 1842

United States 2016 LR4 3.0 SDV6 Landmark LE Auto Yulong WhiteLR4

Thanks everyone. I've been looking at this in a little more detail and, because I have rear air and heating dug into the LR4 service manual that's online on a couple of sites. The procedure for changing coolant on my vehicle seems to involve a front and rear drain process to get all the coolant out. I just got a quote from my stealer for $300 to do it, and although I've never paid anyone to change my coolant in the past I think I may just handover the money given the hassle it appears to be, plus the risk of air in the system. The coolant alone here is $50 of that price so whilst it's a complete cop out, it's the way I'm inclined to go.

Grateful for the comments.
 PAGODA  
Post #218832920th Nov 2020 1:27 pm
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