Fan/Clutch Assembly

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Adam - 26 Dec 2005 16:11 GMT

I am trying to change the water pump on a 99 jimmy with a V6, I took off the
bolts holding on the pulley thinking they were for the fan/clutch, but they
werent. so how do I get the fan off? On the shaft there is what looks like a
place were I could possibly put a 19mm wrench to turn it, but I'm not sure.

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Silver Surfer - 26 Dec 2005 18:56 GMT

Document ID# 339479
1999 GMC Truck Jimmy - 2WD
--------------------------------------------------------------------------------
Fan Clutch Replacement

Removal Procedure
Tools Required
J 41240 Fan Clutch Wrench

Remove the upper fan shroud. Refer to Fan Shroud Replacement

Important
In order to maintain a balanced fan assembly, align the yellow paint mark on
the fan clutch hub with the yellow paint mark on the water pump hub.

Remove the fan clutch from the coolant pump using J 41240
Install J 41240-1 into the water pump access holes.
With J 41240-2 secure on the fan clutch nut, hold J 41240-1 firmly in place
while turning J 41240-2 counter-clockwise.
Remove the fan and the fan clutch as an assembly.

>I am trying to change the water pump on a 99 jimmy with a V6, I took off
>the bolts holding on the pulley thinking they were for the fan/clutch, but
[quoted text clipped - 3 lines]
> place were I could possibly put a 19mm wrench to turn it, but I'm not
> sure.

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Adam - 27 Dec 2005 00:28 GMT

I talked to autozone tonite and they said that the method I am going to use
will work just fine on it.

> Document ID# 339479
> 1999 GMC Truck Jimmy - 2WD
[quoted text clipped - 24 lines]
>> place were I could possibly put a 19mm wrench to turn it, but I'm not
>> sure.

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HLS@nospam.nix - 26 Dec 2005 21:34 GMT

> I am trying to change the water pump on a 99 jimmy with a V6, I took off the
> bolts holding on the pulley thinking they were for the fan/clutch, but they
> werent. so how do I get the fan off? On the shaft there is what looks like a
> place were I could possibly put a 19mm wrench to turn it, but I'm not sure.

As Silver Surfer has indicated, some of these can be much easier to remove
if the special tool is available. Autozone and similar stores will often
have
them available for rental or loan.

The fan clutch/fan essentially screws onto the shaft in such a way that
rotation tend to keep them tightened.

I have managed to get the Dodge variant off without the use of special
tools, but it would have been a lot easier with them. Dont know about the
GM variant.

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Mike Marlow - 27 Dec 2005 00:10 GMT

> > I am trying to change the water pump on a 99 jimmy with a V6, I took off
> the
[quoted text clipped - 9 lines]
> have
> them available for rental or loan.

As well - one of the best investments you can make if you're going to wrench
on your own vehicle, is a Haynes manual for that vehicle. They cost under
$20 at most aftermarket auto supply shops - Auto Zone, Advance Auto,
PepBoys, etc. Beats having to post to a usenet forum and wait for a good
reply.

Signature

-Mike-
mmarlowREMOVE@alltel.net

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Adam - 27 Dec 2005 02:23 GMT

Usually I use Autozones online guides, they have most vehicles, if I need
more specific info I goto the library and make a copy of the chilton there.

I just use the newsgroups to get someone elses ideas and experience and
suggestions, because somthings the manual wont tell you 'how' to do it, just
how to get it complete.

>> > I am trying to change the water pump on a 99 jimmy with a V6, I took
>> > off
[quoted text clipped - 19 lines]
> PepBoys, etc. Beats having to post to a usenet forum and wait for a good
> reply.

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