| [GMCnet] Fan clutch follies [message #272267] |
Wed, 18 February 2015 18:47  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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Hi Ken,
The fan clutch that was in the coach when the new engine went in was a Hayden 2797. I changed that out for an ACDelco which was called a 2053 (I think it really is a 15-4644 but it is not marked on the unit itself), then changed that out for an AutoZone boxed version of a USA made Hayden 2705. All lock up around 2000 RPMs in normal driving. I still have another untested AuotZone boxed version of a Hayden 2747 which I could try. Of all the fan clutches out there is there one you think would work best with the plastic fan?
I will try changing the plastic fan for the metal stock one and see if that makes any difference. Thanks for your comments.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
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Message: 3
Date: Wed, 18 Feb 2015 14:59:25 -0700
From: Ken Burton
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Fan clutch follies
Message-ID:
Content-Type: text/plain; charset="utf-8"
My first reaction is you have either a Hayden clutch or a bad clutch. Hayden clutches come on at a lower temperature.
The heater coolant flow direction is not really important.
If this only started after installing the plastic fan you could switch back to the steel one and see if anything changes. This is the first I have
heard of anyone having a problem using the plastic fan so I'm hesitant to blame your symptoms on it.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Fan clutch follies [message #272290 is a reply to message #272267] |
Thu, 19 February 2015 05:07  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I made my comment out of experience with Hayden clutches several years ago. I went through several severe duty and several heavy clutches before giving up and going to an AC Delco clutch. I worked with Hayden's engineering and only after installing 5th clutch did they admit that they had dropped the engagement temperature on their product. They were proud of their lower engagement temperature. On the 5th clutch, a heavy duty one, they tried to get me to modify that clutch with a Dremel tool to change the engagement temperature back to OEM specs. I never did it. At that point I had spent over 2 years playing with their clutches and I gave up. I went with an AC Delco heavy duty clutch recommended originally by Denny Allen and later by AC Delco engineering. That same clutch is still installed today.
Luckily for me they kept sending me different clutches for free to try and I was able to return the original one for a refund after 2 years. So it ended up not costing me anything except my labor time.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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