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Spookytooth



Member Since: 19 Jan 2014
Location: Lincolnshire
Posts: 202

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
Extremely noisy fan
Once my Defender has warmed up the fan roars like a jet engine. Most noticeable when pulling away in 1st or 2nd or changing down from say 6th to 5th. It is now happening nearly all the time (I can press the clutch pedal at speed and roar the engine with the throttle, however it never seems to happen when revved on the drive). I originally thought it was a turbo/intercooler hose, however, I am now pretty sure it is the fan roaring as for once I was able to replicate the problem at home. It is losing power and using more fuel and the noise is a head turner in town traffic and seems to be even worse than normal in this hot weather (UK standards). It has been to the dealer 3 times in all but they say nothing happens when they have it which is probably true as it is always worse after being warmed up' I am now getting concerned as it seems unwilling to pull away on roundabouts and T junctions and just roars away. Usually changing up at very low revs will help but of course you soon have everyone up your butt with their horn blaring
I was wondering if anyone had had a similar problem and found a solution (2.2 2013, approx. 18k miles)
Post #348438 30th Jul 2014 7:27pm
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borderterrier



Member Since: 09 Dec 2011
Location: Surrey
Posts: 1677

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
Mine does it too, even from cold. Sounds like the old fixed fan engines.
Post #348440 30th Jul 2014 7:28pm
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Muddybigdog



Member Since: 11 Apr 2014
Location: Suffolk
Posts: 1020

United Kingdom 2007 Defender 90 Puma 2.4 XS CSW Zambezi Silver
My puma 2007 does the same, feels quite gutless as it sounds like the engine using all it's power to make the noise Jumped ship to reliability - Mitsubishi L200
Puma 90 XS - Sold
D3 - 2.7 S x2 (both Sold)
Freelander 2 HSE - Sold
Freelander 1 - Sold
Disco 2 - Sold
Post #348463 30th Jul 2014 8:40pm
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
Do you guys have aircon?

My Disco3 does they same when it is warm like now and driving slowly and at start-up. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #348526 31st Jul 2014 6:57am
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Muddybigdog



Member Since: 11 Apr 2014
Location: Suffolk
Posts: 1020

United Kingdom 2007 Defender 90 Puma 2.4 XS CSW Zambezi Silver
Yup, Thumbs Up been invaluable in recent weeks for the dogs and passengers Jumped ship to reliability - Mitsubishi L200
Puma 90 XS - Sold
D3 - 2.7 S x2 (both Sold)
Freelander 2 HSE - Sold
Freelander 1 - Sold
Disco 2 - Sold
Post #348527 31st Jul 2014 7:00am
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Spookytooth



Member Since: 19 Jan 2014
Location: Lincolnshire
Posts: 202

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
Air con fitted, however, does not have any impact on fan roar whether on or off
Post #348534 31st Jul 2014 7:29am
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bear100



Member Since: 22 Mar 2010
Location: South Wales
Posts: 1917

Wales 2010 Defender 110 Puma 2.4 USW Santorini Black
The viscous fan will come into play as and when needed, when towing my caravan it will do it in 1st 2nd
May be worth having if checked I am sure they are not that expensive either
Thumbs Up 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)
Post #348535 31st Jul 2014 7:43am
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
Is the Puma fan not electronically controlled like with the D3? Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #348544 31st Jul 2014 9:02am
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borderterrier



Member Since: 09 Dec 2011
Location: Surrey
Posts: 1677

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
2.2 TDCI fan is viscous. Aircon fan is electric.
Post #348549 31st Jul 2014 9:16am
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
Ok sorry for the confusion. The Disco 3 only uses 1 fan for both. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #348560 31st Jul 2014 10:29am
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Spookytooth



Member Since: 19 Jan 2014
Location: Lincolnshire
Posts: 202

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
I think my issue is that the viscous fan is coming on strong when its not needed. It comes on with a jet engine roar when I am solo, neither carrying nor towing anything and have done nothing but drive a few miles up the road. In this hot weather it starts to roar almost straight away
Does anyone know what or where the fan get its signal from in order to decide how hard to work as I am beginning to think that's where the problem lies and sorry to go on does it make sense that the fan roaring can also account for the apparent power drop and increased fuel consumption. Thanks
Post #348667 31st Jul 2014 8:31pm
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bear100



Member Since: 22 Mar 2010
Location: South Wales
Posts: 1917

Wales 2010 Defender 110 Puma 2.4 USW Santorini Black
A viscous fan has no input or signal, imagine two sets of vanes independent of each other one attatched to the engine the other to the fan in a container surrounded by a liquid that gets thicker as it gets hotter. 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)
Post #348678 31st Jul 2014 9:05pm
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borderterrier



Member Since: 09 Dec 2011
Location: Surrey
Posts: 1677

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
That's correct and that's why it's weird that it does it when the engine is cold.
Post #348682 31st Jul 2014 9:17pm
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Spookytooth



Member Since: 19 Jan 2014
Location: Lincolnshire
Posts: 202

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
So am I correct in saying the signal for the fan to speed up is the liquid (assume fan clutch fluid) getting hotter? Can I ask what causes the liquid to heat up, is it coolant temperature, engine load or something else. Thanks
Post #348704 1st Aug 2014 6:25am
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borderterrier



Member Since: 09 Dec 2011
Location: Surrey
Posts: 1677

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Aintree Green
The liquid is a silicone liquid which is thin when cold. Heat from the engine causes the liquid to heat up and as it does so it gets thicker. At this point the liquid 'binds' the fan blades and the fan pulley as one via a clutch arrangement. The engine gets cooled by the rotating fan, liquid cools down, gets thinner and drive to fan is disengaged. Thats the theory, but a knackered viscous coupling (clutch) will either not engage causing overheating or not disengage causes the fan to be engaged all the time which uses more fuel. As an aside its a similar system to that used on the Freelander to engage 4WD.
Post #348708 1st Aug 2014 7:00am
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