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Old 11-29-2012, 12:59 PM
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remove fan?!

im replacing my p/s pump and i cant figure out how to get tha frikin fan off. help
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Old 08-01-2013, 11:00 AM
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I've got the same problem. Trying to pull the fan (tried POS tool from Advanced Auto, pneumatic clutch wrench, 1 7/8 combo & chain wrench), I cannot break this thing loose.

Haynes manual says its LH threads, Alldata says RH thread (fan turns clockwise (standing in front of truck), 7.3 and 6.0 guys say LH threaded). WTF!!

There are some 7.3 guys talking about using a air chisel on the nut, anyone of you ever pull the 6.4L clutch fan?
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Old 08-20-2013, 02:14 PM
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Just pulled mine with a pneumatic tool. If I remember right it was reverse thread. and it was a real bastard to break loose. We had to use a pry bar to stop the fan from spinning and really go to town with that pneumatic wrench, crank up the compressor!


Sent from AutoGuide.com App
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Old 08-23-2013, 07:59 AM
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Get an Air chisel, and just put it on 1 side of the nut with the chisel pointing down in the direction the nut needs to spin. A couple blasts with that should loosen it.
Did this on my dad's duramax and it came right off took 30 seconds.
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Old 09-04-2013, 03:52 PM
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My duramax fan came off no problem, my 6.4 was a pita. Used a matco air hammer on a fan wrench for a half hour, nothing. Ended up using a chain wrench on the flat portion of the pulley toward the front, stood on the chain wrench and pulled up on the fan clutch nut , clockwise .... then it popped loose .
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Old 09-16-2013, 03:12 AM
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Yep, reverse threads. I tried the lame-fan-tool they rent at the auto parts store (didn't work), tried the pneumatic tool from Lisle (didn't work), ended up buying a large combo wrench, cut off the box-end side used a two three-foot cheater bars (one the wrench, one on the chain wrench on the water pump pulley) - took allot of grunting but eventually it came off.
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