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pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1929
  
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| D4 coolant change - tricky to bleed or ok? |
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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
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 19th Nov 2020 4:01 pm |
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Flack
Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6314
  
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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 
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| 19th Nov 2020 5:04 pm |
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pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1929
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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
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| 19th Nov 2020 5:48 pm |
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Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1081
  
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| Re: D4 coolant change - tricky to bleed or ok? |
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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
https://www.mediafire.com/folder/5mhvubw2bens1/Dis4
https://www.disco4.com/forum/lr4-manuals-d...p;start=15
Cheers. "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything 
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
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| 20th Nov 2020 8:18 am |
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teddy
Member Since: 22 Jul 2017
Location: suffolk
Posts: 72
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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. 2010MY Disco 4 HSE in Ipanema Sand over Almond.
It's got THE rear diff.
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| 20th Nov 2020 12:05 pm |
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pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1929
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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
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| 20th Nov 2020 1:27 pm |
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