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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Electric Cooling Water pump
Hello

Has anyone fitted an electric cooling water pump system like the Davies and Craig system?

From the reports I've read, it will allow the engine to operate at the right temperature from start up quicker and the system only works at a flow the engine requires at that moment, hopefully improving mpg by not having the constant drag for the mechanical water pump.

Any ideas?
Post #732444 2nd Oct 2018 11:51am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7664

2011 Defender 110 Puma 2.4 USW Stornoway Grey
there was plenty on this a while back, personally i wouldnt fit one. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #732449 2nd Oct 2018 12:46pm
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Thanks, James.

I did a search but didn't find out anything, will try again later.
Post #732453 2nd Oct 2018 12:52pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7664

2011 Defender 110 Puma 2.4 USW Stornoway Grey
think it was on a 300tdi, will look later. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #732455 2nd Oct 2018 12:59pm
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gazman



Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

United Kingdom 2003 Defender 90 Td5 HT Alpine White
Would the heater still work?? 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r
Post #732603 2nd Oct 2018 8:51pm
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Hi

Yes it should, if the pump is not running, then convection current flow should still flow to the heater because it will be cooler than the engine and the cold air flowing past the heater element should also help.

I think........
Post #732605 2nd Oct 2018 8:58pm
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ajps72



Member Since: 08 Jan 2012
Location: Lima Peru
Posts: 105

2001 Defender 110 Td5 SW Chawton White
If you are looking at improving mpg, then electric fan should be the first change, that uses more power than the electric pump.

I do like the idea of heating using the residual heat from the engine. Augusto

Defender 110 TD5 2001
Discovery 4 TDV6
Post #732607 2nd Oct 2018 9:15pm
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Hello Augusto

I will need to remove and fit an electric fan which will improve the mpg, the electric water pump controller will also switch the fans on.

Many thanks
Post #732613 2nd Oct 2018 9:32pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 556

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Easiest way to improve MPG is change Defender for another car. Improvement like electric cooling pump will make the car less reliable. Standard proper working fan has nearly no influence on engine - with running engine it is just barely rotating - it is possible to stop it with a finger. If not, than it is stuck and needs replacement. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #732628 3rd Oct 2018 5:34am
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Hello MadTom

Like everyone here, I choose to drive a Defender at every opportunity and have always wondered how can I improve my defender.

An electric water pump should be reliable, after all the heater motor and cooling fans are electric and I've never had to replace either of them on any of my cars.
Post #732732 3rd Oct 2018 2:00pm
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Many thanks for your comments.
Very Happy Very Happy Very Happy
Post #732733 3rd Oct 2018 2:00pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 556

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Failure of heater fan = no heating, but not cooked engine.
Cooling fan - standard are belt driven, electric powered is the fan for A/C, failure of A/C fan = no A/C or lower A/C power, but not cooked engine, failure of cooling fan (belt driven) = probably big problem like broken belt or punctured water cooler.
Broken electric water pump - probably cooked engine, or at least towing the car home.
In average temperatures, it is not a problem, but my experience with using heavy Discovery od Defender with TD5 engine and travelling into mountains of south Europe in hot summer, the original belt driven fan has huge power, when fully engaged, it is like starting helicopter next to the car. It is not comparable to any "standard" electric powered fan. We had one car with electric fan, and it was not enough, after 2 days of problems with overheating, we managed locally an used belt driven fan, and all was fine. The belt driven fan is kicking only occasionally, but the cooling effect is much bigger when needed. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #732855 4th Oct 2018 7:34am
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Duke851



Member Since: 02 Oct 2018
Location: West Sussex
Posts: 13

United Kingdom 1999 Defender 110 2.5 TD CSW Bonatti Grey
Good Morning MadTom

Many thanks for sharing your experiences with me, it makes a lot of sense.

I am yet to travel that far and in such hot conditions, the last thing I want to do is create a vehicle that does not perform hence asking on a forum.

Very Happy Very Happy Very Happy
Post #732870 4th Oct 2018 9:23am
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