Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: mc9 on 03 April 2009, 20:33:34

Title: Locking viscous fan pulley on 2.5TD?
Post by: mc9 on 03 April 2009, 20:33:34
Can't find a way to lock the pulley so that I can remove the viscous fan. Anyone got a good method? Otherwise its out with the hacksaw and drills to make a "special" tool.

Can't find the rad drain tap -- where is it?

mc9
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: HGV mechanic on 03 April 2009, 20:56:53
i normal get a ring spanner and tap it off with a hammer,(the nut that is) and i belive its oppisite thread
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: RobG on 03 April 2009, 20:58:29
Quote
Can't find a way to lock the pulley so that I can remove the viscous fan. Anyone got a good method? Otherwise its out with the hacksaw and drills to make a "special" tool.

Can't find the rad drain tap -- where is it?

mc9
Bottom hose. Don`t think the rad has got one. IIRC the drain plug is on the engine
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: MickAP on 03 April 2009, 21:10:31
Quote
i normal get a ring spanner and tap it off with a hammer,(the nut that is) and i belive its oppisite thread

Yeah LH thread.

Mick
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: osealy on 03 April 2009, 21:11:44
wedge a nail bar between the nuts on the pump & put a stilson on the viscous nut & hit it the wrong way . Mine came ooff on 2nd thump surprisingly. no pun intended.
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: Seth on 03 April 2009, 21:37:56
Quote
Can't find a way to lock the pulley so that I can remove the viscous fan. Anyone got a good method? Otherwise its out with the hacksaw and drills to make a "special" tool.

Can't find the rad drain tap -- where is it?

mc9

Rad drain tap is located at the extreme bottom nearside of rad.
It's a red slotted thumb-screw which should only unwind a few turns, and drains only about half the total volume of coolant.

For a complete coolant drain-down, there's also a drain bolt, (17mm socket/ring-spanner, from memory), located on the offside of the cylinder-block just aft of the turbo. This removes completely, so be careful not to lose it.
Your cooling system capacity is 10 litres if totally drained. So you'll need to add 5 litres of Vx antifreeze on refilling.

Viscous fan nut:
Looking at the engine from the front, I put an adjustable wrench on the nut at about the '10 past the hour' position.
Then give the wrench a sharp clout clockwise, (downwards), with a hammer.
I've not failed to slacken one yet with this method!
To tighten, jam a strongish screwdriver or pry-bar across two of the pulley bolts to counter-hold, and just pinch the nut up tight - don't 'murder' it up, there's no need .... !
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: platty on 03 April 2009, 22:01:47
As Sethsmate said, give it a tug, don't apply pressure because when it goes it will take most of your hand with it (as i found out) give it a whack and that shoudl crack it. I generally wedge a nasty great screwdriver in somewhere and hope for the best!
Title: Re: Locking viscous fan pulley on 2.5TD?
Post by: TheBoy on 04 April 2009, 10:39:32
All exactly as Sethsmate says :y