How do I get the fan clutch off? - Chevy and GMC Duramax Diesel Forum
04.5-05 LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 06-25-2009, 03:10 AM   eBay Motors  #1 (permalink)
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How do I get the fan clutch off?

So I'm trying to get the fan clutch off. Of course I only had a 1-5/8th in wrench so after I buy a 1-7/8 inch wrench on my way home tonight, I'm still going to need to get it off.

Standing in front of the motor, looking into the engine bay with the wrench on the clutch standing straight up, do I give it a stiff whack from driver's side to passenger side or from passenger's side to driver's side?

Or is there an easier way I don't know about?

Thanks guys. Erik
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Old 06-25-2009, 04:28 AM   eBay Motors  #2 (permalink)
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Whack it from the driver side torwords the pass side. Or if you are in front of it looking at it, it turns counter-clock wise too loosen and clock-wise to tighten. I had to wedge a long screw in there to help keep it from turning..
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Old 06-25-2009, 02:50 PM   eBay Motors  #3 (permalink)
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mijdirtyjeep, thanks for the heads up.

How exactly did you wedge a screw in? I've been whacking away at the 1-7/8 wrench and it either turns the accessories or slips the pulley under the stationary serpentine belt .

Any help would be greatly appreciated guys! Thanks, Erik
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Old 06-25-2009, 03:13 PM   eBay Motors  #4 (permalink)
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I just used the holes that are on the pulley by putting a spanner wrench in there to hold it in place then just muscled it loose. Worked fine but I'm surprised I didn't bust any knuckles.
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Old 06-25-2009, 04:00 PM   eBay Motors  #5 (permalink)
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Originally Posted by Dmax15 View Post
I just used the holes that are on the pulley by putting a spanner wrench in there to hold it in place then just muscled it loose. Worked fine but I'm surprised I didn't bust any knuckles.
I see what you're saying about the holes in the pulley. They sure are tiny. I couldn't get anything to work, crap. I'll have to call the Chevy dealer across from work, see if they sell a tool to lock into the holes in the pulley.
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Old 06-25-2009, 04:58 PM   eBay Motors  #6 (permalink)
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Well, tried Autozone who assured me over the phone they had the right tool, and I tried Advance Auto Parts who had a much larger kit but still no luck. I found a place online that has it on sale for $60. If GM wants a million dollars I might have to buy it online.

I tried bending an old no name screwdriver to fit into the hole but found nothing to really brace it against. This stinks.
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Old 06-25-2009, 05:36 PM   eBay Motors  #7 (permalink)
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get a chisel and hit the pass side of the fan bolt, several smacks and it will spin right off. thats how i know several have done it and thats how i did mine.
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Old 06-25-2009, 05:42 PM   eBay Motors  #8 (permalink)
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get a chisel and hit the pass side of the fan bolt, several smacks and it will spin right off. thats how i know several have done it and thats how i did mine.
Ya that is how I did the last 2 that I put on my truck (NAPA crap) I can not remember where exactly I wedged the screw driver, but it was accost the top of the pulley (water pump) and under the power steering pulley!!
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Old 06-25-2009, 05:43 PM   eBay Motors  #9 (permalink)
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you really dont need to wedge anything, the sharp blows will break it free.
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Old 06-25-2009, 05:45 PM   eBay Motors  #10 (permalink)
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^^^^^^^What he said Ive done hundreds this way.
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