Home » Public Forums » GMCnet » More fan stuff if you can stand it
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| Re: [GMCnet] More fan stuff if you can stand it [message #96314 is a reply to message #96306] |
Wed, 18 August 2010 11:35   |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Okay, here's where I am on this fan stuff.....
1. Whatever fan clutch I had in my coach when I purchased it worked perfect,
the needle was always 1/8" below the 1/4 mark on the temp gauge, sorry I don't
have a real temp gauge, but this is the best I can do for now.
2. That fan clutch failed so I put in a 15-4644...which cycled a ridiculous
amount and was way too noisy.
3. I replaced the 15-4644 with a 15-4947.......I ran hot. So I checked my
timing and a few other things and we did a 300 mile trip this weekend.......the
day we left it was 88 degrees and very humid, the needle ran 1/16" over the 1/4
mark and I still never heard the fan.......on our return trip it was 68 degrees
and very low humidity and the temp was exactly the same, 1/16" over the 1/4
mark, don't know what the exact temp was but I knew we were running HOT. That
clutch is too light duty in my opinion.
4. My next step is to try to hook up an actual temp gauge and take a run to see
exactly what temp I'm running at.
5. Then.....my plan is to check our thermostat, I ordered a new Robert Shaw
330-195. I don't know what stat I have in there, but if it's lower than a 195
that may have caused the severe cycling with the previous 15-4644 clutch. I
plan to put in the new stat and put back in the 15-4644 clutch and test that
out.
I will keep everyone posted as I go through this.
I was thinking maybe an 8' wide by 4' deep funnel on the front of the coach that
narrows to the size of the radiator would fix the problem.......but that would
be one UGLY GMC !! LOL
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Bob de Kruyff <NEXT2POOL@AOL.COM>
To: gmclist@temp.gmcnet.org
Sent: Wed, August 18, 2010 10:43:16 AM
Subject: [GMCnet] More fan stuff if you can stand it
There's some interesting stuff here:
http://www.hortonww.com/products/products.asp?/en/14/&utm_source=SAE&utm_medium=WebBanner&utm_term=bus&utm_content=VMaster&utm_cam paign=2010_Horton_Advertising
--
Bob de Kruyff
78 Eleganza
Chandler, AZ
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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: More fan stuff if you can stand it [message #96320 is a reply to message #96306] |
Wed, 18 August 2010 12:21 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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Senior Member |
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interesting clutch Bob. looks like they are quite deep to fit uor engine.
Ray, i run half way between the 1/4 and 1/2 marks. my Digipanel shows about 180 deg. it's hard to tell exactly with that panel.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] More fan stuff if you can stand it [message #96321 is a reply to message #96314] |
Wed, 18 August 2010 12:40 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
Karma: 0
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Senior Member |
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| Ray Erspamer wrote on Wed, 18 August 2010 09:35 |
(snip) we did a 300 mile trip this weekend.......the day we left it was 88 degrees and very humid, the needle ran 1/16" over the 1/4 mark and I still never heard the fan.......on our return trip it was 68 degrees and very low humidity and the temp was exactly the same, 1/16" over the 1/4
mark,
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
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Ray, I expect you know that humidity has no effect on things like engines, only on people. So, hi, low or whatever humidity will make absolutely no impact on your gages or measurements. It is the temperature, as read on a normal thermometer that is the only thing that is important.
Rob Allen
former owner of '76 x-PB
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| Re: [GMCnet] More fan stuff if you can stand it [message #96322 is a reply to message #96320] |
Wed, 18 August 2010 13:03 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Hi Fred, that's why I need to get a real temp gauge on to see exactly what's
going on, I plan to do that before I change a thing.
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: fred veenschoten <fredntoni@cox.net>
To: gmclist@temp.gmcnet.org
Sent: Wed, August 18, 2010 12:21:05 PM
Subject: Re: [GMCnet] More fan stuff if you can stand it
interesting clutch Bob. looks like they are quite deep to fit uor engine.
Ray, i run half way between the 1/4 and 1/2 marks. my Digipanel shows about 180
deg. it's hard to tell exactly with that panel.
--
Fred V
'77 Royale RB 455
P'cola, Fl
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GMCnet mailing list
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GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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] More fan stuff if you can stand it [message #96323 is a reply to message #96321] |
Wed, 18 August 2010 13:05 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Thanks for clarifying that Rob, I knew the humidity didn't affect the engine
temp, but it sure affected "my temp"....LOL
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Rob Allen <profmail@wildblue.net>
To: gmclist@temp.gmcnet.org
Sent: Wed, August 18, 2010 12:40:15 PM
Subject: Re: [GMCnet] More fan stuff if you can stand it
Ray Erspamer wrote on Wed, 18 August 2010 09:35
> (snip) we did a 300 mile trip this weekend.......the day we left it was 88
>degrees and very humid, the needle ran 1/16" over the 1/4 mark and I still never
>heard the fan.......on our return trip it was 68 degrees and very low humidity
>and the temp was exactly the same, 1/16" over the 1/4
>
> mark,
>
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
Ray, I expect you know that humidity has no effect on things like engines, only
on people. So, hi, low or whatever humidity will make absolutely no impact on
your gages or measurements. It is the temperature, as read on a normal
thermometer that is the only thing that is important.
--
Rob Allen
former owner of '76 x-PB
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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] More fan stuff if you can stand it [message #96325 is a reply to message #96314] |
Wed, 18 August 2010 13:21 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| Ray Erspamer wrote on Wed, 18 August 2010 12:35 |
Okay, here's where I am on this fan stuff.....
1. Whatever fan clutch I had in my coach when I purchased it worked perfect,
the needle was always 1/8" below the 1/4 mark on the temp gauge, sorry I don't
have a real temp gauge, but this is the best I can do for now.
2. That fan clutch failed so I put in a 15-4644...which cycled a ridiculous
amount and was way too noisy.
3. I replaced the 15-4644 with a 15-4947.......I ran hot. So I checked my
timing and a few other things and we did a 300 mile trip this weekend.......the
day we left it was 88 degrees and very humid, the needle ran 1/16" over the 1/4
mark and I still never heard the fan.......on our return trip it was 68 degrees
and very low humidity and the temp was exactly the same, 1/16" over the 1/4
mark, don't know what the exact temp was but I knew we were running HOT. That
clutch is too light duty in my opinion.
4. My next step is to try to hook up an actual temp gauge and take a run to see
exactly what temp I'm running at.
5. Then.....my plan is to check our thermostat, I ordered a new Robert Shaw
330-195. I don't know what stat I have in there, but if it's lower than a 195
that may have caused the severe cycling with the previous 15-4644 clutch. I
plan to put in the new stat and put back in the 15-4644 clutch and test that
out.
I will keep everyone posted as I go through this.
I was thinking maybe an 8' wide by 4' deep funnel on the front of the coach that
narrows to the size of the radiator would fix the problem.......but that would
be one UGLY GMC !! LOL
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
___
|
Ray, When you get your Robertshaw thermostat, try to blow through it. If you can blow through it the thermostat will not work well in the GMC. Mr Gasket sells them and you can breath through them since they have a large bypass and you will be lucky to get within 20 degrees of the stated temperature and the engine will run too cold. Another company buys them and puts three 1/8th inch holes in the thermostat and they will also not work for us. I believe it is Stewart Racing. These are made for high powered street rods and high performance engines.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] More fan stuff if you can stand it [message #96329 is a reply to message #96325] |
Wed, 18 August 2010 13:57 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
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|
Hi Gene....geeeezzzzzzzz, I thought I just recently saw on the GMC net that the
Robertshaw 330-195 was the best one to get.
So, which one IS the best to buy ???
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Gene Dotson <shawnee@charter.net>
To: gmclist@temp.gmcnet.org
Sent: Wed, August 18, 2010 1:21:13 PM
Subject: Re: [GMCnet] More fan stuff if you can stand it
Ray Erspamer wrote on Wed, 18 August 2010 12:35
> Okay, here's where I am on this fan stuff.....
>
> 1. Whatever fan clutch I had in my coach when I purchased it worked perfect,
> the needle was always 1/8" below the 1/4 mark on the temp gauge, sorry I don't
> have a real temp gauge, but this is the best I can do for now.
> 2. That fan clutch failed so I put in a 15-4644...which cycled a ridiculous
> amount and was way too noisy.
> 3. I replaced the 15-4644 with a 15-4947.......I ran hot. So I checked my
> timing and a few other things and we did a 300 mile trip this weekend.......the
>
> day we left it was 88 degrees and very humid, the needle ran 1/16" over the 1/4
>
> mark and I still never heard the fan.......on our return trip it was 68 degrees
>
> and very low humidity and the temp was exactly the same, 1/16" over the 1/4
> mark, don't know what the exact temp was but I knew we were running HOT. That
> clutch is too light duty in my opinion.
>
> 4. My next step is to try to hook up an actual temp gauge and take a run to
>see
>
> exactly what temp I'm running at.
>
> 5. Then.....my plan is to check our thermostat, I ordered a new Robert Shaw
> 330-195. I don't know what stat I have in there, but if it's lower than a 195
> that may have caused the severe cycling with the previous 15-4644 clutch. I
> plan to put in the new stat and put back in the 15-4644 clutch and test that
> out.
>
> I will keep everyone posted as I go through this.
>
> I was thinking maybe an 8' wide by 4' deep funnel on the front of the coach
>that
>
> narrows to the size of the radiator would fix the problem.......but that would
> be one UGLY GMC !! LOL
>
>
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
> ___
Ray, When you get your Robertshaw thermostat, try to blow through it. If you
can blow through it the thermostat will not work well in the GMC. Mr Gasket
sells them and you can breath through them since they have a large bypass and
you will be lucky to get within 20 degrees of the stated temperature and the
engine will run too cold. Another company buys them and puts three 1/8th inch
holes in the thermostat and they will also not work for us. I believe it is
Stewart Racing. These are made for high powered street rods and high
performance engines.
--
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
|
|
|
|
| Re: [GMCnet] More fan stuff if you can stand it [message #96330 is a reply to message #96329] |
Wed, 18 August 2010 14:08 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
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On Aug 18, 2010, at 12:57 PM, Ray Erspamer wrote:
> Hi Gene....geeeezzzzzzzz, I thought I just recently saw on the GMC net that the
> Robertshaw 330-195 was the best one to get.
>
> So, which one IS the best to buy ???
>
> Ray
>
>
There are a few different Robertshaw 295 out there. They make them for Mr. Gasket, Prestone and others. Just do as Gene says and try to blow through it when its cold. If there are some small holes in it then you don't want it. When you blow you shouldn't be able to get much, if any, air through it.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] More fan stuff if you can stand it [message #96345 is a reply to message #96329] |
Wed, 18 August 2010 17:41 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| Ray Erspamer wrote on Wed, 18 August 2010 14:57 |
Hi Gene....geeeezzzzzzzz, I thought I just recently saw on the GMC net that the
Robertshaw 330-195 was the best one to get.
So, which one IS the best to buy ???
Ray
|
Ray,
I still will only use a Robertshaw thermostat. In my opinion it is still the best one out, but there are some that are special made like the MR Gasket for high performance engines that will not work in our coaches due to a high bypass built in. That's why I recommended trying to blow through the the thermostat. I tried two Mr. Gasket thermostats before I realized the problem. You can breathe through these thermostats for 5 minutes and feel normal. The correct Robertshaw will not allow any air through the thermostat. I installed a 195 degree one from Mr. Gasket and was lucky to get the temperature up to 150 degrees on level road. Going down a hill the temperature would go down to 140 degrees. I installed a second one since I figured the first one was faulty and it did the same thing. I usually get mine from Jim Kanamata who sells the 180 and 195 degree Robertshaw for around $12.00 and they work. It is getting difficult to find them in any auto store since they usually sell Stant and they have a history of breaking in the GMC. Jim also sells the 195 degree Robertshaw for the Cadillac engine. When you buy his you know it will work.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] More fan stuff if you can stand it [message #96406 is a reply to message #96345] |
Thu, 19 August 2010 10:37 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
|
|
Good Morning
I've seen nearly every fan clutch part number mentioned on here during all of
the recent discussions, but 2 numbers don't seem to fit in and I haven't seen
any source for them...
They are 9727 and 9247.........are these typo's or what's the deal with them ???
Thanks
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Gene Dotson <shawnee@charter.net>
To: gmclist@temp.gmcnet.org
Sent: Wed, August 18, 2010 5:41:07 PM
Subject: Re: [GMCnet] More fan stuff if you can stand it
Ray Erspamer wrote on Wed, 18 August 2010 14:57
> Hi Gene....geeeezzzzzzzz, I thought I just recently saw on the GMC net that the
>
> Robertshaw 330-195 was the best one to get.
>
> So, which one IS the best to buy ???
>
> Ray
Ray,
I still will only use a Robertshaw thermostat. In my opinion it is still the
best one out, but there are some that are special made like the MR Gasket for
high performance engines that will not work in our coaches due to a high bypass
built in. That's why I recommended trying to blow through the the thermostat.
I tried two Mr. Gasket thermostats before I realized the problem. You can
breathe through these thermostats for 5 minutes and feel normal. The correct
Robertshaw will not allow any air through the thermostat. I installed a 195
degree one from Mr. Gasket and was lucky to get the temperature up to 150
degrees on level road. Going down a hill the temperature would go down to 140
degrees. I installed a second one since I figured the first one was faulty and
it did the same thing. I usually get mine from Jim Kanamata who sells the 180
and 195 degree Robertshaw for around $12.00 and they work. It is getting
difficult to find them in any auto store since they usually
sell Stant and they have a history of breaking in the GMC. Jim also sells the
195 degree Robertshaw for the Cadillac engine. When you buy his you know it
will work.
--
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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] More fan stuff if you can stand it [message #96426 is a reply to message #96408] |
Thu, 19 August 2010 11:53 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
|
|
Thanks Emery
My confusion is that I've never seen any fan clutch numbers that begin with the
9.......who sells the 9 numbers ???
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Emery Stora <emerystora@mac.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, August 19, 2010 10:41:19 AM
Subject: Re: [GMCnet] More fan stuff if you can stand it
On Aug 19, 2010, at 9:37 AM, Ray Erspamer wrote:
> Good Morning
>
> I've seen nearly every fan clutch part number mentioned on here during all of
> the recent discussions, but 2 numbers don't seem to fit in and I haven't seen
> any source for them...
>
> They are 9727 and 9247.........are these typo's or what's the deal with them
>???
>
> Thanks
>
> Ray
>
>
On the 9247 someone made a typo. it was supposed to be 9427.
Emery Stora
77 Kingsley
Santa Fe, NM
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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] More fan stuff if you can stand it [message #96448 is a reply to message #96444] |
Thu, 19 August 2010 15:45 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
|
|
This subject is enough to fry my brain, let alone people transposing the
numbers........ holy cats !
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Emery Stora <emerystora@mac.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, August 19, 2010 3:22:44 PM
Subject: Re: [GMCnet] More fan stuff if you can stand it
On Aug 19, 2010, at 10:53 AM, Ray Erspamer wrote:
> Thanks Emery
>
> My confusion is that I've never seen any fan clutch numbers that begin with the
>
> 9.......who sells the 9 numbers ???
>
> Ray
>
>
I have absolutely no idea who does or what brand they were referring to.
The Hayden numbers are 2747 and 2797. Perhaps they were just mixing up those
numbers.
Emery Stora
77 Kingsley
Santa Fe, NM
_______________________________________________
GMCnet mailing list
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_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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