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ericvv



Member Since: 02 Jun 2011
Location: Near the Jet d'Eau
Posts: 5785

Switzerland 2009 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black

A few weeks ago Saturday afternoon returned from the Swiss Defender farewell event, Safenwil to Geneva, about 240 km mostly at 120 kmh highway speeds in about 37/38 C. The temp gauge stayed firmly in the middle, yes the fan was spinning fast when idling during a quick stop at a gas station for buying a few more bottles of water, but gauge never moved up. I always heard that Defender Puma cooling system was designed with ample excess cooling capacity. That drive I mentioned seems to prove so.
Eric You never actually own a Defender. You merely look after it for the next generation.
http://youtu.be/yVRlSsJwD0o
https://youtu.be/vmPr3oTHndg
https://www.youtube.com/watch?v=_GtzTT9Pdl0
https://www.youtube.com/watch?v=ABqKPz28e6A
https://www.youtube.com/watch?v=rLZ49Jce_n0
https://www.youtube.com/watch?v=XvAsz_ilQYU
https://www.youtube.com/watch?v=K8tMHiX9lSw
https://m.youtube.com/watch?v=dxwjPuHIV7I
https://vimeo.com/201482507
https://www.youtube.com/watch?v=ZSixqL0iyHw

Post #438796 18th Jul 2015 9:27pm
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bittersweet



Member Since: 29 Apr 2010
Location: Yorkshire
Posts: 20

2009 Defender 110 Puma 2.4 USW Santorini Black

The standard Land Rover temperature gauge is about as much use as a chocolate fire guard for measuring coolant temperature.

Coolant will boil between about 100-120 C dependent on actual concentration and pressure within the cooling system.

When the temperature gauge hits the start of the red portion of the temperature gauge the coolant could already be boiling.

IF you have sufficient air flow through the radiator it will cool it. High speed means high air flow through the radiator which means good cooling.

Low speed means low forced air flow through the radiator. Low speed means you are forced to rely on fan dragging air through the radiator.

Low outside temperature, low box, long uphill climb has equalled boiled coolant before now. Anything to help cooling = Thumbs Up

B www.4x4overlander.com

Post #438805 18th Jul 2015 10:47pm
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nakatanenga



Member Since: 12 Nov 2010
Location: Neumarkt
Posts: 546

Germany 

There are a couple of Pumas out there suffering from overheating....

Maybee not that many in the UK, guess why Wink WANTED:

SII or SIII in max 1.5k

Post #439034 20th Jul 2015 8:18am
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ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4730

Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue

If we keep getting spells with temps like this:
[URL=]
Click image to enlarge
[/URL]
There may be more...
Good luck with the product :thumbsup:

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green  Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

Post #439124 20th Jul 2015 6:01pm
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smb



Member Since: 15 Jan 2013
Location: Cheshire
Posts: 1195

United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Santorini Black

Come on Peter, Hurry up and ship them to Brendan Very Happy

Post #439126 20th Jul 2015 6:14pm
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Eduardo



Member Since: 28 Aug 2008
Location: RegiĆ³n Metropolitana
Posts: 2045

Chile 2007 Defender 110 Puma 2.4 SW Stornoway Grey

Mine is suffering of overheat for a long time during summers (since 2010).
I have already change the intercooler, a new viscous fan and lately the Thermostat for the gray version.

Probably the next measure, if the problems poup during the next summer, will be the Nakatenga piece, if not, a new alloy radiator that cost several $$$ Sad . Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

Post #439129 20th Jul 2015 6:32pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 479

France 2009 Defender 90 Puma 2.4 SW Alaska White

Hi

It looks fairly similar to this http://www.torqtune.co.za/index.php?route=...uct_id=587

How does this work? Does it move the whole fan and the viscous clutch farther from the engine inside the cowling? Or is it just the fan (ie where does the spacer go, between the engine and viscous clutch or between the viscous clutch and the fan)?

Any risk that the viscous clutch would run at lower temperatures and therefore engage later and would become less efficient than it'd be when located closer to the engine?

Post #439350 21st Jul 2015 2:53pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 479

France 2009 Defender 90 Puma 2.4 SW Alaska White

Received today Thumbs Up

I do have some thermal paste left (for computers CPU/GPU), would it be a good idea to apply some when fitting?

Post #439824 23rd Jul 2015 9:19am
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TTurbine



Member Since: 16 Jul 2015
Location: Doha
Posts: 9

Qatar 2013 Defender 90 Puma 2.2 X-Tech LE Orkney Grey

Did you manage to install it? Any impressions?

Thank you

Post #443107 4th Aug 2015 4:32pm
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nakatanenga



Member Since: 12 Nov 2010
Location: Neumarkt
Posts: 546

Germany 

It moves the fan and the viscous coupling forward.

Thermal paste is useless in this case. WANTED:

SII or SIII in max 1.5k

Post #443115 4th Aug 2015 4:45pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 479

France 2009 Defender 90 Puma 2.4 SW Alaska White

TTurbine wrote:
Did you manage to install it? Any impressions?


Yes, it's been fitted a week ago!

I used a bit of thermal paste, even if it's useless I can't see it causing any harm (a viscous clutch works with heat, anything that help conduct heat can only help, IMHO).

Hard to give any impression yet, to be honest. The temps are now cooler, ~30 degs (much better than a couple of weeks ago...) so I haven't seen much difference. I took the car for a run on a long stiff slope on a dual carriage way and the water temperature reached 94 degs, which is quite expected.

If anything, it seems it now cools down faster, but it could be just an impression.

I plan a trip to southern Spain soon, that should be a better test. We'll see how it goes, I'll report back, stay tuned!


Click image to enlarge



Click image to enlarge



Click image to enlarge

Post #443173 4th Aug 2015 8:43pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

England 

Thermal paste wont do anything , as the part that heats up is in front of the fan , heated up by air from rad

Post #443180 4th Aug 2015 8:59pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 479

France 2009 Defender 90 Puma 2.4 SW Alaska White

Oh right, I stand corrected then, I thought it was the engine heat that would add up and eventually cause the viscous clutch to engage!

So it all makes sense now, it's even better getting it closer to the radiator! Thumbs Up

Post #443184 4th Aug 2015 9:04pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

England 

Possibly 2 things could happen with fan more inside cowling

1 the fan will be more efficient at moving air as less air can be throw out of sides of fan , so more air is drawn though the rad as the fan warms up and starts to grip , so making it better when engine is hot

2 the fan being more inside the cowling will restrict the air flow as your moving ( air pushing though as your driving ) , because when your moving and engine temp ok the fan spins freely , so a possibility it might make engine heat up quicker as you work it going up hill etc
if fan is bit outside would air push though when driving better ?

dont know !!!! Only a idea , but maybe ?

be honest i would perfer a electric fan with its own temp switch , as you can always fit a lower temp switch , or a override switch like i had on my old tdi , automatic temp switch and a overide switch so if i was towing and coming up to hill i could just switch fan on before it got worked hard

Post #443198 4th Aug 2015 9:20pm
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 479

France 2009 Defender 90 Puma 2.4 SW Alaska White

I can't see #2 causing much trouble honestly. At worst, it won't make any difference.

According to some posts on the forums in SA, people have tried similar mods with apparently great results, so if it works for them, it will be good enough for me! Thumbs Up

Post #443204 4th Aug 2015 9:28pm
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