| [GMCnet] Fan clutch follies [message #272232] |
Wed, 18 February 2015 11:10  |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
|
Senior Member |
|
|
Thanks, Armand. I had read your saga as part of my research into this issue while on this trip. The Clasco is a 77 and I had already added the air dams to the upper end of the radiator so all the air coming through the grill is directed thru the radiator. I have not yet done anything about the radiator below the grill other than a rock shield.
One possibility I guess is that the ram air coming through the radiator is "driving" the plastic fan, further fooling the fan clutch into locking up. I will report more when I change back to the stock fan mounted onto the standard duty 2705 fan clutch with no other changes. I'm not sure about the fail open on either the Robert Shaw or this Mr. Gasket thermostat. I, too, think there must be some sort of by-pass around the thermostat but I have tried two different water pumps with no difference in low temp behavior so don't know what else it could be.
Ideas very much welcome!
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
=================
Message: 8
Date: Wed, 18 Feb 2015 09:27:27 -0700
From: Armand Minnie
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Fan clutch follies
Message-ID:
Content-Type: text/plain; charset="utf-8"
Jerry, I don't know about the fan clutches but I am thinking there is some sort of bypass that is defeating your thermostat. I fought the battle of
trying to figure out why the fan clutch "thought" it was time to turn on when it shouldn't and have settled on air flow in the engine compartment.
Funneling the air through the radiator instead of around it and using a "spoiler" to pull the air out the bottom has fixed that problem in my coach. I
use a lighter duty AZ fan clutch and the standard fan and have none of those problems even in Arizona in the Summer - I did before. By the way, make
sure that thermostat is a "fail open" type?
--
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
http://www.minniebiz.com
http://www.gmcws.org
==========
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jerry & Sharon Work
78 Royale
Kerby, OR
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
