It looks like I lost this original thread during last night's Forum problem.  Sorry if the original is still out there or shows up again.

Anyway,  I am removing my mechanical fan and putting in an electric fan.  I pulled the mechanical fan the other day to test fit things and I was thinking I'd like to replace those long water pump pulley bolts with shorter ones, but, I couldn't see how they could be removed.

Can the water pump pulley bolts be removed?  Or are they attached to the water pump itself?

I used 10 pennies drilled them out and they made awesome washhers when in a bind! i did the same thing and the bolts hit so i reached in my pocket and pulled out some change!Best 10cents iv'e ever spent

I would replace the studs.

They're studs!  I never would have thought of that.  Thanks I'll give it a shot.

LOL, you haven't changed your waterpump
yet have you. When you get a new pump,
it won't have studs in it either, at least all
the pumps I've changed didn't

I like Stainless Steel hardware, so I used
Allen head SS bolts, they look really nice,
and give a clean appearance.

Wild

i just put on my 13" 'S' el. fan tonight.  i left the studs on for now, will be replacing soon, fit was tight so i 'leaned' the radiator forward about 1.5", plenty of room now.  the 13" fit good with almost no room top to bottom.  plenty of room left to right so i put it about where the mech fan was and cut the shroud and kept the driverside attached to help direct the air to the fan better.  started it up, the fan kicked on a lil bit after the thermistat opened and ran all the time.  the heater gauge never got past 1/2 but seems hotter that before by about 1/8 to 1/4.  the thing i didnt like was that the fan kept running 10 min after i shut the motor off.... shouldnt be to bad on the battery :-/  have a small fuel leak so i only drove it 2 miles, dont know how it will be on the road, or mud.

o, and the mounting hardware is lame, i just slowly pushed the plastic screws through, worked and nothing is leaking.  wasted $5 on extra hardware

good luck with yours, would like to know if you can tell a difference in proformance.

I didn't like the 16" electric fan I bought,
it just couldn't keep the engine cool enough
with the turbo and the intercooler, might be
OK with your setup tho

Wild

i just put on my 13" 'S' el. fan tonight.  i left the studs on for now, will be replacing soon, fit was tight so i 'leaned' the radiator forward about 1.5", plenty of room now.  the 13" fit good with almost no room top to bottom.  plenty of room left to right so i put it about where the mech fan was and cut the shroud and kept the driverside attached to help direct the air to the fan better.  started it up, the fan kicked on a lil bit after the thermistat opened and ran all the time.  the heater gauge never got past 1/2 but seems hotter that before by about 1/8 to 1/4.  the thing i didnt like was that the fan kept running 10 min after i shut the motor off.... shouldnt be to bad on the battery :-/  have a small fuel leak so i only drove it 2 miles, dont know how it will be on the road, or mud.

o, and the mounting hardware is lame, i just slowly pushed the plastic screws through, worked and nothing is leaking.  wasted $5 on extra hardware

good luck with yours, would like to know if you can tell a difference in proformance.

Hmmm... between your and Wild's post about running warm, I'm a little worried.  I was expecting an electric fan would be fine on mine because at one time I had a 160* thermostat in it and it didn't go above 160*.  Now I have a 180* in it and it stays at 180* (I'm assuming the actual number based on where the gauge was with my original 190* thermostat).  Anyway, it seems like overheating wasn't a problem with the little clutch fan (even with the shroud off now it hasn't changed), so I figured that an electric would be able to keep up.  Guell I'll find out :-/

I'm wiring mine with a relay that will be switched on/off through a switch on the dash that is run off of the ignition.  So, when the ignition is off, my fans shouldn't get any power, plus I can turn them off manually if I like.  Hopefully that's the way it'll work.

I hope to get the fan on this weekend.  Mounting is tight.  I was thinking about using the original shroud, but I think I'd like to keep the original parts intact, so I guess I'll try to figure out some kind of bracket.  I'm a little leary about using the "zip ties" -- the fan I have is kind of heavy.

Mine would run hot whenever I put it in low range.  So when I put the tranny cooler on I also put a pusher fan on the outside.  I used a fan off a newer sport model with a/c.  I also left the mechanical fan on for extra help.  I have to have the pusher on whenever I'm wheeling... even in the snow.
Brian

i dont know what my actual temp is.  but after driving my G/Fs 93 today, i see that i am only over her temp by 1/8 on the gague.  mine sitting, hers on the highway...

i hated cuting the shroud, what ya ganna do
and i didnt like the zips either but the fan is light.  i pulled my a/c a few yrs ago and still have the push fan and i might install it to work with the new on.  my new one didnt have an option to hook into the ignition wish it did, might add a cut off switch.

I did the opposite, I installed a fan over ride
so I could turn it on when sitting on the trail,
instead of waiting for the engine to get to 180*
which is where the little thermostat turns the fan
on at.

I drilled a small hole and tapped it so I could screw the
thermostat right onto the intake manifold right where the
coolant thermostat lives, I did'nt go into the water jacket,
just on the little tab thing that sticks out by the neck where
the top hose connects.

I took the harpoon thing off the Thermostat sensor that you
are supposed to stick through the Radiator (cheesy) and put
it on the engine so I get cooling as soon as the engine gets
to 180* not the radiator to 180*

Wild

Here is a Pic to help with the visualization



Sorry the pic isn't closer, this is just one I had on file.

Wild

I took the harpoon thing off the Thermostat sensor that you
are supposed to stick through the Radiator (cheesy) and put
it on the engine so I get cooling as soon as the engine gets
to 180* not the radiator to 180*

good idea, my fan temp sensor wont do that i dont think, i did lower my fan temp so it kicks on right when the therm opens.  if you ever get around to getting a better pic i would sure like to see it.

OK, I'll go out and snap one.
be up in an hour or so

Wild

I did the opposite, I installed a fan over ride
so I could turn it on when sitting on the trail,
instead of waiting for the engine to get to 180*
which is where the little thermostat turns the fan
on at.

I drilled a small hole and tapped it so I could screw the
thermostat right onto the intake manifold right where the
coolant thermostat lives, I did'nt go into the water jacket,
just on the little tab thing that sticks out by the neck where
the top hose connects.

I took the harpoon thing off the Thermostat sensor that you
are supposed to stick through the Radiator (cheesy) and put
it on the engine so I get cooling as soon as the engine gets
to 180* not the radiator to 180*

Wild

That's definitely a much better set-up.  I look forward to the detailed pics.

I pulled my clutch fan tonight.  Drove it around for a bit and it stayed cool (about 85* ambient this afternoon) even idling at traffic lights.  These things must have really efficient cooling systems on them.

I hope to get the electric installed tomorrow.  We'll see, I'm a mighty slow worker the older I get

Well I got all the dirty pictures  
LOL



And Another angle for a better look



I'm not using the Electric fan now, it just can't pull
enough air to keep the whole works cool

Wild