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PostPosted: Wed Aug 05, 2009 8:38 pm 
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OK, my 2005 chevy 3/4 ton P/U with a 6.0L engine (71,000 miles) has been running hot in stop and go traffic. On the highway it runs fine but in town the temp goes up and down. Idling it runs hot until I run the RPM's up. At first I thought it was the thermostat and was going to replace it but after talking to a couple friends who have similar trucks they had the same problems and it was their FAN CLUTCH. I checked it and there is practically no resistance in the clutch whether the engine is cold or hot. It completely free spins with no resistance. I am usually a fairly level headed guy but this damn thing is making me lose my temper.

I've gotten everything removed and can get to the nut on the back of the clutch, I'm a pretty decent sized guy, 5'10" 220 and have had all I can put on it with all my weight as well and can't get the F!@#$%^ clutch nut to break loose. This looks like the simplest task in the world but I cannot for the life of me get it to break loose. Has anyone out here ever replaced one of this type? I'd appreciate any help. I hate paying a mechanic for something like this.

BTW, I was just on a different CHEVY site I googled and there has been alot of fan clutch problems doing this same thing but no recall so far. Damn my luck.

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PostPosted: Wed Aug 05, 2009 8:51 pm 
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I did one a few years ago on a Trailblazer. I had to heat it up with a torch (carefully of course!!!)

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PostPosted: Wed Aug 05, 2009 10:09 pm 
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is it left hand threads like a dodge??


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PostPosted: Wed Aug 05, 2009 10:20 pm 
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WildLuvRacing1974 wrote:
I did one a few years ago on a Trailblazer. I had to heat it up with a torch (carefully of course!!!)


That didn't damage the seal in the Water pump? I just might have to try that tomorrow since nothing else is working for me.


jeffulmer wrote:
is it left hand threads like a dodge??


No it's right handed threads. After fighting it for a while I checked that. Keep the ideas coming guys. Thanks alot for the responses, I really appreciate it.

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1981 Luv parts trk


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PostPosted: Thu Aug 06, 2009 4:54 am 
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I think I would try an air rattle gun. Mabey some kroil or sumthing. I think the tourch would work too, the block should work for a decient heat sink.


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PostPosted: Thu Aug 06, 2009 5:22 am 
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Dog trainer wrote:
WildLuvRacing1974 wrote:
I did one a few years ago on a Trailblazer. I had to heat it up with a torch (carefully of course!!!)


That didn't damage the seal in the Water pump? I just might have to try that tomorrow since nothing else is working for me.


I was afraid it might but I did that over a year ago and the guy is still driving it. If I remember right I had a garden hose close by, I heated it carefully then cooled it with the hose.

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PostPosted: Thu Aug 06, 2009 10:38 am 
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Are you sure its right threads? I usually use a air chisel and back it off, usually its left threads.

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Last edited by Luvrv8 on Thu Aug 06, 2009 4:05 pm, edited 1 time in total.

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PostPosted: Thu Aug 06, 2009 2:44 pm 
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Thanks for the replies guys, I will be heading out this evening if I get off work in time and I will let you know. I have the replacement one out there and I "thought" it was right hand threads. I will definitely look again and verify. It's seems like the air rattler and maybe the torch will be put to use tonight....if I get off work in time that is. If not then definitely tomorrow.

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2005 Silverado 3/4T Crew Cab
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1979 Luv 4x4 Currently going through Open Heart and Cosmetic surgery
1995 Roughneck JetBoat
1981 Luv parts trk


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PostPosted: Thu Aug 06, 2009 7:34 pm 
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Here is a long post on a trailblazer it is a 03, and it said you need a special wrench. I only read the first page.

http://forums.trailvoy.com/showthread.php?t=9909

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PostPosted: Thu Aug 06, 2009 9:39 pm 
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The special wrench is a air chisel.

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PostPosted: Thu Aug 06, 2009 10:02 pm 
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I got the bastard! On my home from work I stopped at NAPA and they actually have a tool set just for this purpose. It's a Spanner wrench and two wrenches made to fit most of GM's fan clutches. IT's almost $80 but it's a pretty simple tool set. The spanner wrench is nothing more than what looks like a Big pair of Scissors with two pins in the end to hook into two of the four holes on the water pump pully. I made one in about an hour and but still couldn't break it loose. I tried slipping a piece of pipe over the end of an adjustable wrench but that was just a pain in the backside to control so I welded a 12 inch piece of rebar to an adjustable wrench and that gave me the leverage I needed. I found out I need to increase the size of my Combination wrenches. The nut on the clutch is 1 3/8 inches. I have sockets that big and up but not in wrenches. An actual wrench that size would have probably made it a little easier. Oh well it's done and no more overheating problems so far.

Thanks for all the input guys, I really appreciate it. That's what makes this site an overwhelming success.

Karl

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In life there is the "Way things should be" and then "There's the way they are".

2005 Silverado 3/4T Crew Cab
1981 Luv 2WD
1979 Luv 4x4 Currently going through Open Heart and Cosmetic surgery
1995 Roughneck JetBoat
1981 Luv parts trk


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PostPosted: Fri Aug 07, 2009 5:20 am 
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Glad to hear you got it!!

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