HELP S10 4.3 installing water pump , cant get water pump fan off

STRAYDOG · 01-11-2008, 06:11 AM

Installing water pump on my 98 S10 V6,
how do you remove engine fan ? its threaded on the water pump shaft , cant turn nut hopefully not reverse threads , when fan off will there be enough room to remove pump ? do I have to remove radiater to access ?..... cant get clearance to get pump assy off......... any tips apreciated , thanks

Stirgen · 01-11-2008, 09:29 AM

with my 1996 4.3 L. I tried everything and finally just removed the water pump and fan as a single unit. Rather than just taking the fan off.

STRAYDOG · 01-11-2008, 10:02 AM

did you have to remove radater ? my 1998 S1O has little room

436'd skylark · 01-11-2008, 05:56 PM

Snap-on makes a **** of a tool for the job. its designed to be used with an air hammer. works very well.

but its possible to do it without it. The belt needs to be on to hold the pulley. Then take a long crescent wrench, or pipe wrench and whack it hard with a hammer to shock it off. the wrench needs to be longer then the fan blades. It usually comes off after 5 hits or so. if you want to get fancy, I think its a 36mm nut, you could by the wrench..

definitly not reverse threads..

o3shortbed · 01-11-2008, 06:02 PM

i would wedge a screwdriver in the bolts that hold on the pully(you may hafta unscrew the some) then use a wrench to take off the fan. that works for me. buy the way they are normal right hand threads.

STRAYDOG · 01-12-2008, 09:09 AM

To all >>Thanks for all the info , I was able to remove the fan from the water pump & with the fan assembly ( fan/clutch ) off there was enough room to get the pump out with out removing the raditer.................. Job is done

Amendum I am the original owner of this 1998 S10 , for just about 10 years ...the water pump lasted 10 years >>> so whos to complain & still has the original exhaust system ........... life is good.........
" Semper Fi " & thanks..........

rdillon · 01-12-2008, 01:26 PM

You need a air chisel . Make sure your belt is tight. Look at the pitch of your fan blade. Simply opposite of crank direction. Press down on the chisel on the opposite way on that side of the nut. I do this all the time works well.

You can also take off the belt and use a long belt strap around the pulley and try to break it that way too with wrench the opposite way.

01-11-2008, 06:11 AM	#1
STRAYDOG Senior Member Join Date: Sep 2006 Location: Ipswich,Massachusetts Home of the Clam Posts: 51	HELP S10 4.3 installing water pump , cant get water pump fan off Installing water pump on my 98 S10 V6, how do you remove engine fan ? its threaded on the water pump shaft , cant turn nut hopefully not reverse threads , when fan off will there be enough room to remove pump ? do I have to remove radiater to access ?..... cant get clearance to get pump assy off......... any tips apreciated , thanks __________________ Semper Fi Last edited by STRAYDOG; 01-11-2008 at 09:21 AM. Reason: more info

01-11-2008, 09:29 AM	#2
Stirgen Full Member Join Date: Nov 2007 Posts: 17	I had the same problem with my 1996 4.3 L. I tried everything and finally just removed the water pump and fan as a single unit. Rather than just taking the fan off. __________________

01-11-2008, 10:02 AM	#3
STRAYDOG Senior Member Join Date: Sep 2006 Location: Ipswich,Massachusetts Home of the Clam Posts: 51	did you have to remove radater ? my 1998 S1O has little room __________________ Semper Fi

01-11-2008, 05:56 PM	#4
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 620	Snap-on makes a **** of a tool for the job. its designed to be used with an air hammer. works very well. but its possible to do it without it. The belt needs to be on to hold the pulley. Then take a long crescent wrench, or pipe wrench and whack it hard with a hammer to shock it off. the wrench needs to be longer then the fan blades. It usually comes off after 5 hits or so. if you want to get fancy, I think its a 36mm nut, you could by the wrench.. definitly not reverse threads.. __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else Last edited by 436'd skylark; 01-11-2008 at 06:08 PM.

01-12-2008, 09:09 AM	#6
STRAYDOG Senior Member Join Date: Sep 2006 Location: Ipswich,Massachusetts Home of the Clam Posts: 51	To all >>Thanks for all the info , I was able to remove the fan from the water pump & with the fan assembly ( fan/clutch ) off there was enough room to get the pump out with out removing the raditer.................. Job is done Amendum I am the original owner of this 1998 S10 , for just about 10 years ...the water pump lasted 10 years >>> so whos to complain & still has the original exhaust system ........... life is good......... " Semper Fi " & thanks.......... __________________ Semper Fi Last edited by STRAYDOG; 01-12-2008 at 09:11 AM. Reason: Spellin

01-11-2008, 06:02 PM	#5
o3shortbed Senior Member Join Date: Jan 2008 Location: L-burg KY Posts: 314	i would wedge a screwdriver in the bolts that hold on the pully(you may hafta unscrew the some) then use a wrench to take off the fan. that works for me. buy the way they are normal right hand threads.

01-12-2008, 01:26 PM	#7
rdillon Full Member Join Date: Nov 2007 Location: Houston, TEXAS Posts: 22	You need a air chisel . Make sure your belt is tight. Look at the pitch of your fan blade. Simply opposite of crank direction. Press down on the chisel on the opposite way on that side of the nut. I do this all the time works well. You can also take off the belt and use a long belt strap around the pulley and try to break it that way too with wrench the opposite way. __________________ 2005 Chevy 4x4 LS 5.3L BFG KO's Sucks gas but hauls a** 1985 F150 5.0L EFI Old and slow. Used as a decoy when parked at work 2 weeks at a time... Really not a bad truck 16 mpg

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