removing a fan/viscous unit..

[frosty]

   Hi all,

    Ive diaganosed my over heating problem as a failed viscous unit but now i need to take it off, ive got a 32 mm spanner for the nut on the end but i was wondering how to stop the unit turning..

 any ideas?

[Axetamer]

stick a big allen key, drill,  screwdriver, bit of bar or whatever in one of the holes in the pulley to stop the whole lot turning when undoing the coupling

[300TDi Disco]

Are they reverse thread???

[crazymac]

Are they reverse thread???

Yes, left hand thread

[richo]

No they are not as iv'e just had mine off [td5].My mate told me to give the spanner a light tap first with a hammer.
They do seize up sometimes.
I jammed a big screw driver between the nut and levered it down againsted the screws on the pully wheel.

[richo]

Yes left hand thats what i ment as as normal with most nuts and bolts

[extreme90]

all tdis are left hand thread so need turning clockwise to undo
td5 engines are normal right hand thread so need undoing anticlockwise
i never bother locking them off, a quick blow with a 2lb lump hammer shocks them undone

[Range Rover Blues]

The serpentine V8 is RH thread, all other 8s and TDi are LH thread.  I don't know about TD5.  I do know that the RH thread viscous fans have a smaller nut.  If it spins when you tap it with a ahmmer than try tightening the belt with a clamp or large mole grip.

[age]

TD5 is normal 'undo anticlockwise'.

Shock with lump hammer worked for me.  Take out one of the pulley bolts to get a swing with the spanner.

Do remember not to lie the new unit down flat - must stand upright or the viscous lock won't work. A

[Range Rover Blues]

I did not know that, they are supposed to be self-priming once fitted :-k

[frosty]

TD5 is normal 'undo anticlockwise'.

Shock with lump hammer worked for me.  Take out one of the pulley bolts to get a swing with the spanner.

Do remember not to lie the new unit down flat - must stand upright or the viscous lock won't work. A

  thats a worry, i had my mine delivered..i hope the courier knew this aswell! lol

[age]

I was told this for 'storing' mine for nearly a month while I was doing the head in my spare time - I'd guess lying down on the delivery run would be acceptable!!  :D  A