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Alex von Staffeldt



Member Since: 06 Nov 2017
Location: Copenhagen
Posts: 57
Denmark 2008 Defender 110 Puma 2.4 SW Alpine White
2.4 tdci 2008 Thermostat
Im sure this has been a question before, but i cant find an aswer that helps me.

I have had issues with overheating in my Defender 2.4 from 2008.

So far i have changed: coolant pump, thermostat (next to radiator) new radiator and fitted a fan spacer.

Now my problem is that there is almost no heat coming in the cabin.

I have done a fulle bleed several times and nothing helpes.

I have been told that there is 2 thermostats, but cant find the location on the second.

Does anyone know where the 2nd thermostat is located ?

Thanks in advance, and wishing you a nice weekend, Cheers. Defender 110 Puma 2.4 tdci
Post #872587 12th Dec 2020 3:10pm
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Greyman110



Member Since: 29 Sep 2017
Location: London
Posts: 323
United Kingdom 
Does the heater control valve get hot when the car is warmed up?


Click image to enlarge

If it does, check that the cable behind is working by moving the temp control knob in the cabin from cold to hot and that should open and close the valve. You will be able to see the position of the valve change at the back.
Post #872598 12th Dec 2020 4:09pm
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Alex von Staffeldt



Member Since: 06 Nov 2017
Location: Copenhagen
Posts: 57
Denmark 2008 Defender 110 Puma 2.4 SW Alpine White
Hi Greyman110...

Back again Laughing

The valve works and it is hot as the tubes going into the valve. I changed the valve last year, as it was leaking. The cable works just fine.

But the hoses that goes from the valve into the cabin varmer are only semi varm. So i am convinced there is either Censored in the hoses and no circulation or it could be an air pocket in the radiator in the cabin varmer ! Defender 110 Puma 2.4 tdci
Post #872617 12th Dec 2020 6:19pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16915
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
It could also be an internal fault with the heater valve, so that the coolant is always bypassing the heater matrix irrespective of the position of the control.

The heater valves are extremely poor quality, cheaply made, and not very durable. They are also shockingly expensive from Landrover, but cheaper alternatives are available (search this forum for alternatives).
Post #872623 12th Dec 2020 7:20pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
heater valves
alternatives are available


ALFA ROMEO 77363342
CITROEN 6448P6
FIAT 77363342
LANCIA 77363342
PEUGEOT 6448P6
Post #872628 12th Dec 2020 7:36pm
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Alex von Staffeldt



Member Since: 06 Nov 2017
Location: Copenhagen
Posts: 57
Denmark 2008 Defender 110 Puma 2.4 SW Alpine White
blackwolf wrote:
It could also be an internal fault with the heater valve, so that the coolant is always bypassing the heater matrix irrespective of the position of the control.

The heater valves are extremely poor quality, cheaply made, and not very durable. They are also shockingly expensive from Landrover, but cheaper alternatives are available (search this forum for alternatives).



Would it be ok to bypass the valve, so the heat goes directly into the cabin ? Defender 110 Puma 2.4 tdci
Post #872648 12th Dec 2020 9:00pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
this link good read re your control valve


https://www.defender2.net/forum/topic54969-15.html
Post #872650 12th Dec 2020 9:23pm
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Alex von Staffeldt



Member Since: 06 Nov 2017
Location: Copenhagen
Posts: 57
Denmark 2008 Defender 110 Puma 2.4 SW Alpine White
I Will have a look at it Monday, since it's family hunting tomorrow 😜

Thanks Guys for the help.

I'll keep you updated 🙂 Defender 110 Puma 2.4 tdci
Post #872663 12th Dec 2020 10:21pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434
Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
dorsetsmith wrote:
heater valves
alternatives are available


ALFA ROMEO 77363342
CITROEN 6448P6
FIAT 77363342
LANCIA 77363342
PEUGEOT 6448P6


Great info, thank you very much! Thumbs Up Roaming around 🇳🇴🇨🇭
Post #899705 23rd Apr 2021 11:21am
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