This is for replacing the fan clutch on a Series I Discovery.

To replace it you will need 6 things.
1-a 32mm open end wrench, get a cheap one because you will only use it once.
2-a 3lb sledge hammer
3-the fan clutch for a 2000 Chevy Express cargo van with the 4.3L V6 NO a/c.
4-a small rasp or a drill and drill bit.
5-a cheap socket set.
6-a metric allen wrench set or metric allen socket set.

The good news is all of these things are cheap, the Chevy fan clutch is the most expensive part at $50.

Remove the fan shroud.
Put the wrench on the nut behind the fan and whack it hard and quick to the left.
It may take several whacks but it will come loose.
Remove fan.
Lay it flat on the ground and remove the 4 allen head bolts, you may need to use penetrating oil to help get them loose..
Take note of which way the fan is facing because you can install it backwards.
Take your rasp and make the bolt holes in the fan bigger making sure you keep them round.
Take the new bolts from the new fan clutch and keep checking to make sure they just slide through.
Once all four holes are done set the fan clutch face down, then put the fan ontop of it making sure it is flat on the clutch.
Install the new bolts making sure they are tight, tighten them evenly.
Install the fan, whack it once to the right with the wrench but do not use the hammer, use your palm.
Start truck and make sure the fan spins straight and true.
Shut off engine.
Replace fan shroud.
Done.

How much this costs you depends on what tools you already have.

Depending on how stuck things are this can be done inside of 60 min.

If you have questions please do not reply to this thread but instead start a new one.
Thank you.

 

Actual Part Numbers:
Severe duty: Imperial 215158 - Sounds like a plane, but really cools
Standard Duty: Imperial 215157

edit: The severe duty is probably really loud because I also installed an Imperial metal fan blade at the same time.

 

Thanks Tom.

 

Now I used a crecent wrench, but I believe the fan clutcth nut on mine was 36mm not 32mm

 

DITTO for me

 

You can also go to home depot with the new fan clutch and in the plumbing area you will see wrenches like this:

http://images.orgill.com/200x200/5073697.jpg

Maybe you are lucky and get a strong one. The price of one of this wrenches is about $5.

 

This should be a sticky as well.

 

It is.

 

can we get some pictures?

 

It really is a piece of cake. One addition that has been suggested is to also at the same time use a breaker bar, with socket, on the belt tensioner. Instead of pushing to reduce tesnion, like taking off the belt; instead push the other way slightly to increase tesnion. Hit the wrench of choice on the fan clutch bolt toward YOUR left when you are standing in front of the truck facing the engine.

If you try to use just a big wrench and cheater bar extension to slowly turn the bolt everything else turns. If you try to use a clamp or something to wedge against the pulley you may nick the side of the pulley, which will return the favor by shredding the new serpantine belt over time.

The Chevy clutch is the same diameter (6 inch). Do not get the Chevy clutch rated With A/C, that one is a larger diameter and does not fit as well. Been there, got the T shirt.

Now, the Chevy bolt holes are just a tad larger than Rover fan bolt holes, so you have to enlarge what you have. A very important point is that the cupped sides of the fan blade have to go back in the same way they came off. It is considered good practice to mark "front" on the fan when removed.

After doing this I decided to experiment more. I found that lots of Chevy / GM clutch units of the late 90's - early 00's - were also 6 inch diameter and the same reverse direction and the same water pump thread. Now every junk yard is not blessed with Land Rovers. But they have plenty of Chevys. For $20 I got fan and clutch, from a Blazer. Much deeper fan, stiffer pitch, move more are. Had to trim slightly. Point being that if out of town away from regular sources of supply, or needing to budget repair costs the used parts Chevy GMC is a possibility.