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Radiator Overflow Bottle - how does the low level sensor wor
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twr7cx
 


Member Since: 03 Mar 2019
Location: Tasmania
Posts: 122

Australia 2012 Discovery 4 TDV6 Base 5 Seat Auto Nara BronzeDiscovery 4
Radiator Overflow Bottle - how does the low level sensor wor

One of our MY12 2.7 TDV6 D4's is intermittently, but regularly, displaying a Coolant Level Low warning on the dash. I had a look on the parts breakup and there is a Liquid Low Level Warning Switch on the bottom of the Radiator Overflow Bottle:



I swapped this sensor over from our other MY12 D4 TDV6 2.7 and the fault remains - making me think that it's not this sensor experiencing the issue.

Of note is that sensor seems to just clip/pop onto the bottom of the Radiator Overflow Bottle and no coolant leaked out when it was removed.
Is there therefore more to this Coolant Level Low system such as components inside the bottle?
 Mine - modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 Discovery 4 Lion 2.7L TDV6
Dads - MY98 LJ Discovery ES 3.9L V8 
 
Post #21845335th Nov 2020 2:49 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 6688

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yeap. The float is in the bottle and can’t be changed.

Replace bottle
  
Post #21845345th Nov 2020 4:02 am
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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

You can get the floats, I tried fitting a new one and it still did not work, as Pete suggest's above a new bottle is the way to go.

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Post #21845555th Nov 2020 8:37 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 6688

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

the float has a magnet in it.
  
Post #21846085th Nov 2020 12:12 pm
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twr7cx
 


Member Since: 03 Mar 2019
Location: Tasmania
Posts: 122

Australia 2012 Discovery 4 TDV6 Base 5 Seat Auto Nara BronzeDiscovery 4

Pete K wrote:
Replace bottle


Cheers.

With new bottles genuine only or are any of the pattern units (Britpart, Meyle-HD, AllMakes, Eurospare, EAC) ok for this part? I ask as the genuine doesn't seem to have an overly great life and is 3.5 times the price of pattern offerings.
 Mine - modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 Discovery 4 Lion 2.7L TDV6
Dads - MY98 LJ Discovery ES 3.9L V8 
 
Post #21848405th Nov 2020 10:33 pm
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