 | Home > Puma (Tdci) > Fuel cooler 2016 2.2 Puma |
 
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| RustyM Member Since: 28 Oct 2013 Location: Africa/The Med Posts: 222   
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Hi All,
So what we can see is there seems to be a more random installation of the fuel cooler 
So what I would like to know is if it is a cooler or not 
As cooler fuel in hot climates makes a lot of difference 
Thanks for all of your help so far   90 & Wolf
110 XS Previously owned SI SII SIIa SIII & Light weight (air portable) |
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15th Apr 2021 8:57am |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1082  
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The workshop manual says
"The return connecting line returns excess fuel from the HP fuel pump and the fuel injectors to the filter via the fuel cooler. ... To prevent filter waxing at low temperatures, a thermostatic diverter in the filter routes a proportion of the warm return fuel into the filter and back into the supply line to the engine." So the fuel is cooled down but still warm enough to warm up the filter in winter
And what has changed around 2014 that LR thought they could remove the cooler? |
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15th Apr 2021 1:29pm |
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| Angus_Beef Member Since: 30 Apr 2015 Location: Oslo Posts: 434  
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Im wondering if it's not a complication that is simply not needed. Ive had my 2015 2.2 without this part everywhere from the heat of Sardinia to the cold of the north of Norway and had no problems whatsoever.. Roaming around 🇳🇴🇨ðŸ‡
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15th Apr 2021 1:51pm |
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| Marks Landy Member Since: 09 Feb 2015 Location: Cheshire Posts: 300  
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Once the return fuel has had chance to warm the fuel filter will prevent waxing.
Starting from -10C with alleged winter fuel my filter didn’t get chance to warm up and wouldn’t start.  |
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15th Apr 2021 4:53pm |
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| RustyM Member Since: 28 Oct 2013 Location: Africa/The Med Posts: 222
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Hi All,
So the function of this part that some have and others don't seems to be for hot & cold climates...
So is it worth fitting it or not? There is the lubrication factor of hot diesel to consider also
Anyone in SA have a fuel cooler or not? Well I am more than curious now... Thanks for everyone for your input. M 90 & Wolf 110 XS Previously owned SI SII SIIa SIII & Light weight (air portable) |
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16th Apr 2021 1:49pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17487 
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Perhaps the fuel filter was also deleted! 
I suspect that they found that the electric in-tank pump on the 2.2 made the filter warming system unnecessary and were trying to save a few pennies. |
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16th Apr 2021 4:02pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1082
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It's still there 
As I understand the manual the filter is warmed by the return fuel after it went through the now-missing cooler?
Technical rationale aside this may probably be the actual reason  |
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16th Apr 2021 8:32pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17487
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You're right of course! That's why they say that the brain should be engaged first, and why they say it's better to be silent and thought a fool than to speak up and remove any doubt! |I didn't think that one through, did I? Perhaps they found that with the tank pump more heat is needed in the filter! More likely they decided that it didn't make a difference and thought they'd save a few pennies. It wouldn't surprise me if the bypass pipe thingy costs more than the cooler though, knowing the logic of Landrover pricing. |
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16th Apr 2021 8:48pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1082
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17th Apr 2021 7:33am |
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| RustyM Member Since: 28 Oct 2013 Location: Africa/The Med Posts: 222
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Hi All,
So retro fit or not  90 & Wolf
110 XS Previously owned SI SII SIIa SIII & Light weight (air portable) |
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20th Apr 2021 7:51am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17487
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Follow the simple questionnaire below: Q1. Do you have a problem? If yes, go to question two. If no, don't fit fuel cooler. Q2. Is your problem likely to be solved by fitting a fuel cooler? If yes, fit fuel cooler. If no, don't fit fuel cooler. Simple! |
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20th Apr 2021 1:03pm |
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| RustyM Member Since: 28 Oct 2013 Location: Africa/The Med Posts: 222
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Hi,
Problem no, I am more concerned of the possibilities of lack of lubrication from high temp fuel
As far as I am aware the hotter diesel fuels get the lower the lubrication properties if the fuel
So yes I get the "if it is not broken don't fix it" but I want to avoid drastically shortening the life of the parts that are lubricated by the fuel
Thoughts? 90 & Wolf
110 XS Previously owned SI SII SIIa SIII & Light weight (air portable) |
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27th Apr 2021 9:54am |
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| Angus_Beef Member Since: 30 Apr 2015 Location: Oslo Posts: 434
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I was curious about this myself so I did a little test. My 2015 2.2 does not have the fuel cooler. Using the BAS RRC tool, I measured the fuel temperature while driving on the highway. Running the 170 tune and cruising at 75-80 mph the fuel temp registered 26-33 degrees C when the air temperature was 22 degrees and coolant temp varied between 88 and 92 C.
When stopped just off the high way with a hot engine turned off, the temp would climb to close to 40 degrees and then drop. This tells me the temp sensor must be under the hood somewhere to get the heat-soak while immediately stopped. Since the fuel "cooler" is actually just a heat exchanger between return fuel and engine coolant, it seems that this device would be more of a fuel warmer than cooler. Maybe someone who has the fuel cooler can try the same test? Roaming around 🇳🇴🇨🇠|
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27th Apr 2021 10:44am |
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