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How to remove Viscous Coupling on Cooling Fan D3 / LR3
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dpgruv
 


Member Since: 13 Jan 2011
Location: Sydney
Posts: 2

Australia 2005 Discovery 3 4.4 V8 HSE Auto Zermatt SilverDiscovery 3
How to remove Viscous Coupling on Cooling Fan D3 / LR3

Hi I have a Discovery 3 2005 4.4L v8 Jag engine and I am trying to replace the Water Pump. I am not sure which way the Viscous Coupling needs to be removed for the fan... Can you please advise? Thx Doug  
Post #75376229th Jan 2011 7:42 am
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

On the TDV6, it is a left hand thread. Pretty sure that the petrol engine would be the same My D3 Build Thread

TDV8 Retrofit Build Thread  
Post #75377329th Jan 2011 8:56 am
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anglefire
 


Member Since: 09 Mar 2010
Location: In the Club House
Posts: 4180

England 

Easy way to tell is to spin the engine and watch the fan rotation. It will rotate such that it tightens the bolt, so all you need to do is unscrew it the other way.

I know some V8's are right hand thread, but not sure about the 4.4 Embarassed Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

_________________________________________________
Disco Picture Website Here  
Post #75380929th Jan 2011 10:58 am
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Tawny Owl
 


Member Since: 22 Oct 2008
Location: Here and there
Posts: 1645

England 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Left hand thread Thumbs Up

Changed my idler a little while ago and the viscous was f Censored tight !!!

Made up a tool to hold the water pump pulley but needed a person to hold this whilst I undone the viscous. Didn't think it was gonna come off it was that tight Shocked  
Post #75396129th Jan 2011 7:14 pm
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robsmith
 


Member Since: 02 Sep 2007
Location: Staffordshire
Posts: 2392

United Kingdom 2005 Discovery 3 TDV6 S Manual Zermatt SilverDiscovery 3

They are/should always be f'ing tight. One trick is to give the spanner a good sharp twack with a hammer in the undo direction with the pulley locked by whatever means. Rob Smith
Silver rools OK
  
Post #75397929th Jan 2011 7:49 pm
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Tawny Owl
 


Member Since: 22 Oct 2008
Location: Here and there
Posts: 1645

England 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Rob ........ I have removed many viscous fans and yep normally with a good sharp whack it comes undone but mine was refusing to budge for ages , even to the point where it was bending the tool to hold the water pump pulley.  
Post #75399529th Jan 2011 8:22 pm
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discodiscodisco
 


Member Since: 15 Sep 2009
Location: North
Posts: 50

Norway 2005 Discovery 3 TDV6 SE Auto Cairns BlueDiscovery 3

You do need a tool to hold the pulley whilst unscrewing. Made my own by cutting some metal..
Click image to enlarge
[/img]
using it to hold the pulley unscrewing:
Click image to enlarge
[/img] Club Traxide and dual Optima- red and yellow
Club broken EPB
Club 4 broken mudflaps
Club BAS EGR blanks  
Post #75417930th Jan 2011 1:12 pm
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dpgruv
 


Member Since: 13 Jan 2011
Location: Sydney
Posts: 2

Australia 2005 Discovery 3 4.4 V8 HSE Auto Zermatt SilverDiscovery 3

Hi Guys, it took another week before I managed to buy a Chain Wrench which I used to wrap around the water pump pulley and to hold it firm whilst I used a Rubber mallet to hit the Spanner around the viscous coupling. The thread was a right hand thread. Thanks to you all for your advice and help. Now I have to deal with the dreaded "HDC Fault" & "Transmission Fault" & "Suspension Lowered" warning lights coming on each time I start the car.  
Post #76133414th Feb 2011 4:40 am
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thorgal
 


Member Since: 26 Nov 2008
Location: on the east side
Posts: 541

United States 2005 LR3 4.4 V8 HSE Auto Bonatti GreyLR3

DP , that would be your Battery going out,seriously... Thumbs Up  
Post #76133514th Feb 2011 5:41 am
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