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Learningasigo

Member Since: 30 Nov 2023
Location: Midlands
Posts: 28

2013 Defender 110 Puma 2.2 XS CSW Corris Grey

Puma 2.2 coolant temp cooling rapidly

I have seen a couple of aged posts on other forums regarding cooling but thought I would check.

Coolant level just below cold visual level.

2013 2.2 Puma takes about 20/30 mins to get to optimum coolant temperature (horizontal needle on the visual gauge). Takes a good 10 mins before any warm air in the cabin. But if I come to a standstill it will cool rapidly in a matter of seconds and stabilise. See the photo below. Air temp 1 degree. I have only recently purchased so not sure what it’s like in summer months.

Is this normal?

6th Dec 2023 9:30am

camelman

Member Since: 27 Feb 2013
Location: Peak District
Posts: 3362

Yep, it's normal, takes ages to warm up when the weather is cold and temp quickly drops as soon as you stop driving.

I had a number of 2.2s and they all did this.

Park up somewhere when it's cold with the engine running and the heater is blowing cold air within 5 minutes

My TD5 is much better in that respect but I also have a chinese diesel heater which I just leave on the lowest setting when it's cold. Keeps the cabin nice and warm. Uses 1 litres every 10 hours on the low setting.

6th Dec 2023 9:32am

Learningasigo

Member Since: 30 Nov 2023
Location: Midlands
Posts: 28

Thanks Camelman. The post is here ‘ PUMA 2.2 ENGINE COOLING’ a lot of effort has gone into to testing and evaluating why it happens. Everyone seems far cleverer than me with regeds the complexities of mechanical engineering so I will just accept the fluctuations! I didn’t buy a Defender for its luxuries! I bought to keep a smile on my face. If that means a little cold air at traffic lights bring it on! 🥶 😊

6th Dec 2023 9:53am

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

I measure the oil temperature in the oil sump and hardly ever get above 60°C when travelling overland in cold outside temperatures (plusminus 0°C)
What helps is removing the viscous fan, which also reduces fuel consumption and completely covering the radiator with relevant systems (I bought the Nakatanenga Radiator Cover). This ensures 15-20K higher oil temperatures. Which is surprisingly little. Another influence is of course the lack of comfort, little interior heating reflects proportionally higher water and thus oil temperatures.

6th Dec 2023 10:24am

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 497

I have a 2.2l defender and I thought the heater was OK.. I've got the snow cowl over the inlet and the viscous fan is still on the engine.. ..
Warm up is about 10 mins in this weather.. Ie needle to mid position.. With ambient hovering a degree or two above freezing.
What I have noticed is the blower has to be running to get the heat through.. I also fitted one of those plastic deflectors on the lower heater outlet which takes the warm air into the foot well area..Great little mod..
On a 240 odd mile trip today if the heater was on max I had to turn the fan off occasionally as it was getting to warm..
If the heater control was backed off then the blower could be left running and it maintained a comfortable temp in the cab..
As an aside I have noticed a big difference in comfort when the dpf is not fitted.. When it's on the drivers footwell can become extremely warm regardledd of heater settings.. Most probably only obvious on long runs.. But that's what I've noticed..

6th Dec 2023 4:28pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 497

Ps.. Oil temp on mine settles at about 104 deg C , that's under steady driving at around 60..and the coolant will hover from high 80's to high 90's

6th Dec 2023 4:31pm

macfrank

Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 1061

2015 Defender 110 Puma 2.2 SW Keswick Green

Same observations as andy's; also installed the heater deflector. DPF is at the passenger side (LHD) where "she" sits and enjoys the additional heat (not in summer though)

6th Dec 2023 8:08pm

steveww

Member Since: 05 Jan 2022
Location: Uppingham
Posts: 566

2015 Defender 110 Puma 2.2 XS CSW Bronze Green

On my 2.2 I get warm air from the heater quite quickly, as previously mentioned the blower has to be on for it to be effective. If I leave the heat on max and the blower on 1, after 30 mins it gets really warm in the cabin and I turn the heat down bit leave to blower on. The heat setting is a bit of a knife edge, one click too far and you're too hot or too cold. Everything standard with the heating on mine.

7th Dec 2023 11:08am

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

andy63 wrote:
Ps.. Oil temp on mine settles at about 104 deg C , that's under steady driving at around 60..and the coolant will hover from high 80's to high 90's

Interesting. How is that oiltemperature measured?

16th Dec 2023 8:04am

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 497

my oil temp reading comes from the torque app which I quite often run when im driving...im not sure where it takes that temp but I thought the pumas had a oil level and temp sensor on the lower right hand side of the block, just beside the exhaust support bracket..

16th Dec 2023 7:00pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

That's correct, I overlooked the fact that it is about 2.2.

20th Dec 2023 9:23am

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