| Old Subject AGAIN....Fan Clutches [message #303168] |
Wed, 06 July 2016 14:17  |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Good Afternoon Everyone
Question: What is the lastest on fan clutches?? I know there are Severe Duty, Heavy Duty and Standard Duty clutches. I've been using the 2747 which is equivalent to a Heavy Duty but I'm not happy with it, it doesn't seem to be doing the job and I go through at least one per year. I've tried several different brands of the Severe Duty like the 15-4644 but they continually cycle from being dead quiet to the famous 747 roar which is a no go.
What are you people using these days that actually works????
Thanks
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Old Subject AGAIN....Fan Clutches [message #303170 is a reply to message #303168] |
Wed, 06 July 2016 14:57  |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma: 2
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Senior Member |
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Do you have baffles that direct the air through the radiator instead of
around it? I think the reason that GMCs have so many fan clutch failures is
because they engage at highway speeds and they are not designed for that
kind of duty. They are only supposed to engage in traffic, idling, etc.
where there is not enough air flow from the grill. I wrote up my
experiences at
http://minniebiz.com/gmcmotorhome/2011/05/20/gmc-engine-cooling-issues/
On Wed, Jul 6, 2016 at 12:17 PM, Ray Erspamer wrote:
> Good Afternoon Everyone
>
> Question: What is the lastest on fan clutches?? I know there are Severe
> Duty, Heavy Duty and Standard Duty clutches. I've been using the 2747 which
> is equivalent to a Heavy Duty but I'm not happy with it, it doesn't seem
> to be doing the job and I go through at least one per year. I've tried
> several different brands of the Severe Duty like the 15-4644 but they
> continually cycle from being dead quiet to the famous 747 roar which is a no
> go.
>
> What are you people using these days that actually works????
>
> Thanks
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
visit my gmc blog
click here to visit gmcws.org
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| Re: Old Subject AGAIN....Fan Clutches [message #303172 is a reply to message #303168] |
Wed, 06 July 2016 15:30 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Yes, I have the side baffles that direct the air to the radiator.
Thanks
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: Old Subject AGAIN....Fan Clutches [message #303178 is a reply to message #303172] |
Wed, 06 July 2016 18:02 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Wondering if all these changes tp oem are realy nessesary? Mine is all oem, except for a allu radiotor and a patrtson engine. Never runs hot, only hear the fan at start up and a longe steep hill. Never in traffic, actually temps go down in slow heavy traffic.
Maybe one should focus more on adjustment of ignition and carb then changes to oem ?
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Old Subject AGAIN....Fan Clutches [message #303202 is a reply to message #303178] |
Thu, 07 July 2016 05:14 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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appie wrote on Wed, 06 July 2016 18:02Wondering if all these changes tp oem are realy nessesary? Mine is all oem, except for a allu radiotor and a patrtson engine. Never runs hot, only hear the fan at start up and a longe steep hill. Never in traffic, actually temps go down in slow heavy traffic.
Maybe one should focus more on adjustment of ignition and carb then changes to oem ?
Ray - My my conditions and experiences are the same as Appie's. I don't remember which fan clutch I have. It is the one you recommended to me a few years back. Like Appie I have an AL radiator w/o baffles.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Old Subject AGAIN....Fan Clutches [message #303208 is a reply to message #303202] |
Thu, 07 July 2016 08:57 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Ordered from applied, think it is a heavy duty? But again other then on startup I only heard it once going up a hill in Portugal where my friend in a 6.2 brave sheid.
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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