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Niels906

Member Since: 04 Jul 2020
Location: Bussum
Posts: 44

Tips on removing visco fan

Evening all,

I'm trying to remove the visco fan on my 2007 2.4 tdci Defender Puma, in order to replace the brake vacuum pump. Problem is, I can't seem to loosen the fan? I tried the trick with the hammer and the spanner, but it's just too tight. Any tips or ideas?

Also is it really necessary to remove the fan? The service manual seems to leave it on, but takes it away for purposes of clarity (page 191).

Thanks all for your help!

29th Jun 2021 7:55pm

90 Dreamer

Member Since: 13 Jul 2019
Location: Oop North
Posts: 2169

2016 Defender 90 Puma 2.2 HT Corris Grey

Can't answer your questions but this thread has a tool pattern......

https://www.defender2.net/forum/topic79154.html

29th Jun 2021 8:00pm

ickle

Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1786

2008 Defender 110 Puma 2.4 CSW Alpine White

I always use a SDS hammer drill, on hammer only action with a blunt chisel - a very quick zap on the edge of the nut (no locking tool required) and it spins off - leaving the nut virtually unmarked!

Trust me I'm a doctor - (not really)

Keith

29th Jun 2021 8:01pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17450

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

You usually need to hold the pulley with a pin spanner or similar when you remove it since it has probably been massively overtightened in the factory. When you reassemble use anti-seize and don't overtighten, and you should have no future problems.

You don't have to remove the fan for a vac pump change though it makes it easier. You will need to remove the serpentine belt and that requires unloading the tensioner, which is easier with the fan off. It is however possible using a 3/8" sq dr extension bar between the fan blades with the fan in place.

29th Jun 2021 10:02pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17450

ickle wrote:
I always use a SDS hammer drill, on hammer only action with a blunt chisel - a very quick zap on the edge of the nut (no locking tool required) and it spins off - leaving the nut virtually unmarked!

Trust me I'm a doctor - (not really)

Keith

Shame on you Sir! A chisel on a nut! Tut, tut.

29th Jun 2021 10:04pm

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