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camcc



Member Since: 01 Oct 2023
Location: Godalming, Surrey
Posts: 30

United Kingdom 
Coolant appears low but no warnings

Hi all,

My new (to me) RR 2006 4.4 AJV8 was recently in at Glenrands for a health check. Great guys and operation over there. The RR got a clean bill of health aside from the fact there was no thermostat installed. It was removed by the previous owner to troubleshoot an issue with lack of fan heat and I guess they forgot to re-install it. Anyway, a new genuine thermostat was installed by Glenrands and the car is running great as it did before I took it in, not overheating, no dash warnings or error messages.

Today I was installing an OEM spec front grill (to replace an aftermarket one) and noticed the coolant level looks very low. I'm not getting a low coolant warning in the car.

Should I just top it up as normal?

Post #677021 1st Nov 2023 5:10pm
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KF



Member Since: 19 Jul 2022
Location: Kerava
Posts: 34

Finland 2007 Range Rover Vogue TDV8 Stornoway Grey

There probably is an issue with coolant disappearing and the sensor has been disabled, ask me how I know Rolling Eyes -07 Stornoway Gray TDV8

Post #677023 1st Nov 2023 5:37pm
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camcc



Member Since: 01 Oct 2023
Location: Godalming, Surrey
Posts: 30

United Kingdom 

Oh dear, how can I check if the sensor has been disabled? I have an IID tool.

Post #677029 1st Nov 2023 6:19pm
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philip1972



Member Since: 16 Jun 2017
Location: Marval 87440
Posts: 502

France 2006 Range Rover Autobiography 4.2 SC V8 Java Black

It may need to be lower to trigger the warning. I lost coolant the other week, and stopped as soon as the message came on, but it did look like the level was lower than that.

Someone who actually knows what they are talking about might come along soon Rolling with laughter

Post #677031 1st Nov 2023 6:24pm
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KF



Member Since: 19 Jul 2022
Location: Kerava
Posts: 34

Finland 2007 Range Rover Vogue TDV8 Stornoway Grey

camcc wrote:
Oh dear, how can I check if the sensor has been disabled? I have an IID tool.


With IID tool you can able/disable that, can´t really member the route to find it, but it´s in the CCF. Just wonder around and you will find it. -07 Stornoway Gray TDV8

Post #677036 1st Nov 2023 8:12pm
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4200

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Give them a call and I’m sure Ross will want to take a look for you Thumbs Up 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #677040 1st Nov 2023 8:20pm
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fanders



Member Since: 10 Jul 2013
Location: Hants, UK
Posts: 308

United Kingdom 2009 Range Rover Autobiography 4.2 SC V8 Buckingham Blue

Undo the expansion tank bleed screw and take off the bottle cap, and watch the level rise in the bottle. If it settles between the fill lines, all is well.

fanders
Thumbs Up ---------------------------------------
2009 4.2 SC Buckingham Blue
2021 Hilux 2.4

Post #677045 1st Nov 2023 9:19pm
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garyRR



Member Since: 13 Mar 2021
Location: Hampshire
Posts: 1286

United Kingdom 

If your level sensor is faulty, it is likely to throw up the error on your dashboard anyway. The level sensor is quite low down in the tank, because that's exactly what the tank is - an expansion tank.

There is enough space to feel down and check the multiplug is connected. You can see the sensor through the plastic, so if the level was higher than the sensor, you wouldn't have got the 'Coolant Level Low' message.

As Fanders has suggested, I'd try bleeding first. If Glenrands have replaced the thermostat, there may be some residual air trapped in the system that's worked its way through to the highest point (the expansion tank). You may also find the pressure release cap could need replacing. Then top up as required.

I winced when I saw my Dad top up his 5.0 with tap water. 2015 Range Rover Autobiography 4.4 SDV8

Post #677125 3rd Nov 2023 1:30am
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camcc



Member Since: 01 Oct 2023
Location: Godalming, Surrey
Posts: 30

United Kingdom 

Thanks all for your responses!

As if by magic, I loosened the bleed screw and removed the tank cap and the coolant level rose, to just above the fill line (assume this is okay?)

I will leave the cap off / bleed screw open for a couple of hours (engine off/cold), reattach, then take the RR for a run to see what happens.


Click image to enlarge

Post #677152 3rd Nov 2023 10:30am
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4200

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

All normal to me Thumbs Up Bow down
Is that a Jag 4.4 V8? I'd love to see it Thumbs Up 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #677153 3rd Nov 2023 10:31am
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camcc



Member Since: 01 Oct 2023
Location: Godalming, Surrey
Posts: 30

United Kingdom 

Yep, 4.4 AJV8!

Post #677156 3rd Nov 2023 10:42am
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