 | Home > Other Site Sponsors > [For Sale] PUMA overheat? We have the cure! |
 
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| ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816   
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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 |
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18th Jul 2015 8:27pm |
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| bittersweet Member Since: 29 Apr 2010 Location: Yorkshire Posts: 20 
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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 = 
B www.4x4overlander.com |
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18th Jul 2015 9:47pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731  
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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  Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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20th Jul 2015 5:01pm |
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| smb Member Since: 15 Jan 2013 Location: Cheshire Posts: 1232  
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Come on Peter, Hurry up and ship them to Brendan
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20th Jul 2015 5:14pm |
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| Eduardo Member Since: 28 Aug 2008 Location: Región Metropolitana Posts: 2110  
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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 $$$  . Eduardo
MY 2007 110 SW PUMA 2.4: Big Fog of 64' MY 1994 Jayco 1207 Folding camper: "El Tremendo" Click image to enlarge |
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20th Jul 2015 5:32pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 545  
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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? |
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21st Jul 2015 1:53pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 545
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Received today
I do have some thermal paste left (for computers CPU/GPU), would it be a good idea to apply some when fitting? |
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23rd Jul 2015 8:19am |
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| TTurbine Member Since: 16 Jul 2015 Location: Doha Posts: 9  
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Did you manage to install it? Any impressions?
Thank you |
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4th Aug 2015 3:32pm |
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| nakatanenga Member Since: 12 Nov 2010 Location: Neumarkt Posts: 546
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It moves the fan and the viscous coupling forward.
Thermal paste is useless in this case. WANTED: SII or SIII in max 1.5k |
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4th Aug 2015 3:45pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 545
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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 |
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4th Aug 2015 7:43pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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Thermal paste wont do anything , as the part that heats up is in front of the fan , heated up by air from rad
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4th Aug 2015 7:59pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 545
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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! |
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4th Aug 2015 8:04pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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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 |
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4th Aug 2015 8:20pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 545
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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! |
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4th Aug 2015 8:28pm |
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