Dopey · Jun 5, 2014

Viscous fan help urgent
Doing the job now, have the tool to undo the nut, doing it LH thread (the way the fan turns...) its stuck fast, heated it up as much as I can, still no joy, any tips as to how to get it off please??

Bumfluffff · Jun 5, 2014

Ive just done some work on my THOR 4.6 and if the same it should just be a case of putting a spanner on one of the bolts holding the pully to the water pump then put the fan spanner on and give it a good hit to the left. Should be enough to hold it unless someone has bodged it putting it on and actually tightened it!! then your pretty much stuffed and will need to unbolt it at the water pump and do it in a vice.
Ive been there before with a friends GEMS so know it can be done!!

wammers · Jun 5, 2014

You have been told how to do it many times, decent 32 spanner and an hammer. It needs to be shocked loose. Trying to turn it with an Ebay spanner made from soft cheese does not work all that often.

wammers · Jun 5, 2014

Bumfluffff said:
Ive just done some work on my THOR 4.6 and if the same it should just be a case of putting a spanner on one of the bolts holding the pully to the water pump then put the fan spanner on and give it a good hit to the left. Should be enough to hold it unless someone has bodged it putting it on and actually tightened it!! then your pretty much stuffed and will need to unbolt it at the water pump and do it in a vice.
Ive been there before with a friends GEMS so know it can be done!!

Giving it a good hit to the left on his car will only tighten it up i am afraid. Fans ALWAYS undo in the direction they rotate.

Dopey · Jun 5, 2014

did all that shock and all, and even crept up behind it and shouted BOO! gave it heat, so out with the water pump then???

bmp42 · Jun 5, 2014

long socket extension or 2 - then hit the flat of the nut on the right hand side - takes a few blows but always undoes ( removed 2 p38 TD fans this week using this method after spanner and hammer did not work)

Dopey · Jun 5, 2014

RR. 2.5 d, has in the past had the Viscus fan shocked off with a hammer and chisel, looking at the tell tale marks it was put back on the same way. I have a very good spanner that has been used many times to remove these fans. I have remove the bolts from the water pump shaft and fitted a pair of 10 inch mole grips, with an extension bar, then using the spanner and another extension bar tried to undo the thing still no luck, so I suppose it's pump out? Unless you know different?

wammers · Jun 5, 2014

Dopey said:
did all that shock and all, and even crept up behind it and shouted BOO! gave it heat, so out with the water pump then???

You are not shocking enough.

bmp42 · Jun 5, 2014

its only going to come off with shock not force - the same way some idiot appears to have fitted it back on, yesterdays fan removal was a bitch as somebody in there infinate wisdom had use loctite on the the thread !!

wammers · Jun 5, 2014

bmp42 said:
its only going to come off with shock not force - the same way some idiot appears to have fitted it back on, yesterdays fan removal was a bitch as somebody in there infinate wisdom had use loctite on the the thread !!

That's a good one, idiot born every minute. Sometimes i wish it was illegal for amateurs to work on cars.

Paul D · Jun 5, 2014

I made a 'spanner' out of a plate of 6mm steel ..

A good swing with a 2lb lump hammer shocked mine straight off .. though mine was a Disco 300Tdi, the principle is the same ..

PS, ignore the safety boots, you don't have to be as careful ...

tomcat59alan · Jun 5, 2014

They suit you sir !

Dopey · Jun 5, 2014

Picks.. the spanner isn't en eBay one, nut is starting to round off, we are getting a large chisel and are going to muller it off

Dopey · Jun 5, 2014

I am going to need a new nut.... what was the size again? left hand thread

Paul D · Jun 5, 2014

The nut is captive to the viscous unit.

Dopey · Jun 5, 2014

Thanks m8

Dopey · Jun 5, 2014

No one is selling just the nut... cant find one

Paul D · Jun 5, 2014

Dopey said:
No one is selling just the nut... cant find one

They won't, I misled you it isn't a separate captive nut, It's actually part of the viscous coupling casting, or at least it's a part of the 'bearing' race or centre of the VC. Sorry.

jamesmartin · Jun 5, 2014

Dopey said:
I am going to need a new nut.... what was the size again? left hand thread

if you hit the center of each flat in turn with flat ended punch enough times nut will unscrew by hand

tomcat59alan · Jun 5, 2014

Dopey said:
No one is selling just the nut... cant find one

?????? It's PART of the viscous fan !

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