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fan noise when accelerating in cold weather
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adara
 


Member Since: 14 Nov 2005
Location: Eastern Europe
Posts: 152

Romania 
fan noise when accelerating in cold weather

When it is cold outside and I start the car in the morning, or simply if the engine has cooled, I get a supplemental noise while accelerating for the first minutes, it's like an extra fan is at work, even at small revs, but only while pushing the pedal. It dissapears all by itself after a while, do you get it too? What is it?
 

Last edited by adara on 8th Dec 2005 7:56 am. Edited 1 time in total 
Post #317008th Dec 2005 7:53 am
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10forcash
 


Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534

United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt SilverDiscovery 3

it's the viscous coupling on the cooling fan.... nothing to worry about Wink
  
Post #317018th Dec 2005 7:54 am
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adara
 


Member Since: 14 Nov 2005
Location: Eastern Europe
Posts: 152

Romania 

OK, but is it normal for the cooling fan to work when the engine is cold?
  
Post #317028th Dec 2005 7:57 am
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Gareth
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Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26683

United Kingdom 

adara wrote:
OK, but is it normal for the cooling fan to work when the engine is cold?


Yes its wierd, but normal. They all do it. It is to do with a phenomenon called "Heat Soak" when you turn off the engine.

The excess heat closes the thermal clutch on the fan pulley. This stays closed until the engine next starts up. It takes a few seconds for the movement of the fan to open the clutch again.

This is according to my mate in the pub! but it sounds plausible to me Wink
  
Post #317818th Dec 2005 2:28 pm
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rhcaspian
 


Member Since: 17 Dec 2005
Location: Baku Azerbaijan
Posts: 10

2005 LR3 4.4 V8 HSE Auto Java BlackLR3
Noisey fan

I had the same problem but when the car was hot, saw somewhere in the US where they had a recall on this - viscous fan problem. It's cold now and the problem has gone. Annoying though sounds like your dragging a jet engine
  
Post #3424722nd Dec 2005 2:23 pm
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