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Home > Maintenance & Mods (L322) > 36mm Viscous fan spanner

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kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1205

2011 Range Rover Autobiography TDV8 Santorini Black

36mm Viscous fan spanner

Which spanner is best for removing the fan?
I've made a tool to hold the hub but just wondered whether I should get a dedicated fan spanner like the Laser tools one or is it best to get a straight ended one that I could put an extension tube on if it's really tight and need the extra leverage.
Will it be really tight?
Thanks Kev.

27th Mar 2022 10:07am

diesel Dave

Member Since: 14 Aug 2015
Location: Stockport
Posts: 455

2019 Range Rover Autobiography SDV8 Santorini Black

It’s a bit of a lottery to be honest, some come off easy while others seem to have been tightened up by the Incredible Hulk.
Personally I would use a 36 MM open end you can put an extension on, that way if it is tight you can give it some beans to remove it, as the dedicated viscous spanner’s break quite easy. Also remember they’re left hand thread, hope its an easy one.

27th Mar 2022 10:18am

Bean19844

Member Since: 25 Oct 2020
Location: Essex
Posts: 929

2006 Range Rover Supercharged 4.2 SC V8 Bonatti Grey

Laser one is OK but obviously you risk a chance of damaging items if you needed to give it a thump to break the seal.

Me personally I'd go to a hgv tool shop and get a long reach spanner do makes life easier

27th Mar 2022 10:27am

Highroller

Member Since: 18 Jul 2016
Location: Hampshire
Posts: 565

2005 Range Rover Vogue SE 4.4 V8 Java Black

I used one from Island 4X4, Still had to give a couple of good thumps before it shifted though.

27th Mar 2022 10:31am

kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1205

Thanks guys.

27th Mar 2022 3:37pm

bgennette

Member Since: 13 Jan 2013
Location: Newcastle
Posts: 74

DIY

This is an easy one.

Go to a scrap metal dealer.
Find a piece of 50 x 3mm steel around 750mm long.
->Just measured the viscous fan coupling on my TD6, its 32mm, not 36mm so
it is best to build a double ended spanner<-
Drill 2 x 5/6mm holes with centers at 40/45mm in and 26/30mm apart.
Use a hacksaw to cut 2 slots 32mm/36mm apart up to the holes.
Bend the center piece to 90°.
Use a hacksaw to cut off the bent out piece. File the 26/36mm cuts to exact size.
~30mm above the bent out piece bend the strip to 45° (same side as first bend), then
~30mm above that bend, bend the strip back at 45° (this creates a 20mm offset)

If you can't get 50 x 3, try some 50 x 5, but 50 x 6 starts to get difficult to bend with hand tools.

Note - BMW (and others) oil filter housing has a 32mm nut moulded into its top ....

bye. 2003 TD6, EGR delete, vortex crankcase breather update, performance chip, UHF 2 way, Android head unit, crash camera on dash, always-on rear view camera to mirror screen, LED DRL`s, Electric trailer brake controller. FSR replaced. Pulling 3T caravan all about Australia

Last edited by bgennette on 7th Apr 2022 9:57pm. Edited 3 times in total

28th Mar 2022 4:38am

johnboyairey

Member Since: 11 Jan 2013
Location: surrey
Posts: 2032

2012 Range Rover Westminster TDV8 Orkney Grey

£14 Halfords. Spray the nut first, drink a cup of tea, spray again. Put spanner on, and with a medium hammer, and a thick gloved right hand, hit the spanner to the right, and catch the spanner with the right hand. About 4 inches away. Takes a few. Hits.

28th Mar 2022 5:52pm

kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1205

Thanks all for the useful information.

28th Mar 2022 6:46pm

alanm_3

Member Since: 19 Feb 2011
Location: my House, unless I’m not at home, in which case I’m somewhere else.
Posts: 6723

2017 Range Rover Autobiography SDV8 Loire Blue

I ended up using a cold chisel to get it loose Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

28th Mar 2022 7:35pm

mercs600

Member Since: 19 Mar 2011
Location: North Yorkshire
Posts: 425

Large adjustable spanner and an £8 ebay 36mm special . Clouted the adjustable once and the nut undid been on for 20 years and came off no problem. Viscous fan and shroud binned

7th Apr 2022 10:15am

kevinp

Member Since: 28 Sep 2019
Location: Telford
Posts: 1205

I bought a cheap 36mm open ended straight shaft spanner, put an extension tube on and it cracked off quite easy. Was expecting to struggle but it is quite a new fan so I'm happy.

7th Apr 2022 10:19am

johnboyairey

Member Since: 11 Jan 2013
Location: surrey
Posts: 2032

alanm_3 wrote:
I ended up using a cold chisel to get it loose

if you use a chisel, you are stressing the bearing on the water pump, with every hit...and that can make the seal fail, ...either will cause the water pump to leak/wear/fail.

10th Apr 2022 8:03pm

alanm_3

Member Since: 19 Feb 2011
Location: my House, unless I’m not at home, in which case I’m somewhere else.
Posts: 6723

There was no other way to get it loose and more 2 years down the line, no water pump issues Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

11th Apr 2022 4:48am

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