 | Home > Puma (Tdci) > Narrowing down the problem-Overheating |
 
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789  
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yep good point, i used our 'power washer' - kinda somewhere between the two i guess, no danger of damage. It looked pretty clean anyway...
yep going to get down to chris when i can anyway, will ask him to de map so i can have a quick test drive and then see if any different. Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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28th Apr 2014 11:10pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11327
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It could well be a knackered viscous fan. Your description of no problems on a motorway and then overheating when you slow down reminded me of a similar problem that I had with a Stage 1 V8 years ago that was fine when moving fast but would overheat when crawling along. In my case it turned out that somebody had fitted the fan backwards so it was drawing warm air from the engine over the rad. The relevant bit though, is that moving at speed overcame the problem by just pushing air through the grill. In your case, if the fan isn't locking up properly then heat soak after slowing down from a higher speed or when under load could produce a similar result.
They easiest way to test it is first try to turn the fan by hand when the engine is cold (and off, obviously). This will give you a feel for the unlocked resistance. Then get the engine good and hot and try again. It should then be really stiff to turn compared to when cold. To be honest though, you should be able to hear the thing working as it sounds like a vacuum cleaner when it's locked up. Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Apr 2014 11:10pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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the fan is definitely working, at least at tick over.
Think ill start with the map and then the thermostat, then ill start worrying if its neither of them...! Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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28th Apr 2014 11:19pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11327
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Viscous fans will turn all of the time. They are not like electric fans that turn on and off. They operate by the fluid in the hub thickening as they get hotter, transferring more torque to the fan blades, much like a torque converter in an automatic gearbox. Hence, it will feel much stiffer to turn by hand when hot than when cold. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Apr 2014 11:26pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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ok so it could be turning at tick over (it didn't look very fast!) but then not increasing speed as required? That could be possible...
Why isn't it just belt driven haha? they never make it easy! Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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28th Apr 2014 11:28pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11327
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Viscous is easy compared to electric
 Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Apr 2014 11:33pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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purchased a new viscous fan & coupling anyway. It was such a good price that i'd probably get my money back anyway if it doesn't fix the problem...
heres to hoping! learn something new everyday.. cheers LRA Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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28th Apr 2014 11:33pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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yes just realised that thinking it through. my brain made the "I've not heard of that, therefore confusing expensive magical engineering complexity" connection... Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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28th Apr 2014 11:34pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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Very useful, thanks
Cheers, David
Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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29th Apr 2014 9:01am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11327
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Munch, I know what you mean, but we discovered the problem purely by chance whilst standing in front of the grill and feeling warm air being pushed out. I guess it must have been some quirk of the curvature of the fan blades, but turning it around solved the problem, which I was very greatful for at the time! Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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29th Apr 2014 9:42am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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sorry but no, fan fitted backwards still blows same way just not as well
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29th Apr 2014 7:20pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11327
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Ah well, I must have imagined it then
 Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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29th Apr 2014 7:36pm |
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| Eduardo Member Since: 28 Aug 2008 Location: Región Metropolitana Posts: 2111  
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As DW will do and to try to solve the problem (same as davidwhittaker) I decide to change the Viscous fan and the thermostat (already ordered from one of our site supporters).
I hope that will solve the problem because is drive me crazy. We will see  . 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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29th Apr 2014 9:41pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: London Posts: 2789
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hope we'll get it sorted soon, Defender ownership really is a full time job but i wouldn't change anything... Cheers, David
Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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29th Apr 2014 9:46pm |
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