| [GMCnet] Robertshaw Thermostat [message #97043] |
Tue, 24 August 2010 17:34  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Gene,
I installed a Robertshaw thermostat when I fitted the aluminum manifold. I
did not have a copy of the manual for the thermostat when I installed it. I
installed it with the "pointy" end up (towards radiator).
I am a bit confused by what you've noted below.
I did a Google search for the Robertshaw 330-180 thermostat but have not
been able to find the manual.
Are you saying that the thermostat should be "clocked" so that a little
dimple on the flange faces forward towards the radiator?
Regards,
Rob M.
USAussie
-----Original Message-----
From: Gene Dotson
Benny,
When you install the Robertshaw thermostat make sure the little dimple on
the flange goes toward the radiator. The manual says if it isn't one bank
of cylinders will run hotter than the other. I don't know if it will but I
am not going to find out either.
--
Gene Dotson
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Robertshaw Thermostat [message #97048 is a reply to message #97043] |
Tue, 24 August 2010 18:31  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| Robert Mueller wrote on Tue, 24 August 2010 18:34 |
Gene,
I installed a Robertshaw thermostat when I fitted the aluminum manifold. I
did not have a copy of the manual for the thermostat when I installed it. I
installed it with the "pointy" end up (towards radiator).
I am a bit confused by what you've noted below.
I did a Google search for the Robertshaw 330-180 thermostat but have not
been able to find the manual.
Are you saying that the thermostat should be "clocked" so that a little
dimple on the flange faces forward towards the radiator?
Regards,
Rob M.
USAussie
-----Original Message-----
From: Gene Dotson
Benny,
When you install the Robertshaw thermostat make sure the little dimple on
the flange goes toward the radiator. The manual says if it isn't one bank
of cylinders will run hotter than the other. I don't know if it will but I
am not going to find out either.
--
Gene Dotson
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Hi Rob: I`m not Gene, but that is what the book says..X7425 6K6
The thermostat consists of a restriction valve actuated
by a thermostatic element. A 195° thermostat
is used and the use of thermostats rated above 195
degrees F. control temperatures are not recommended.
This is mounted in the housing at the cylinder
head water outlet above the water pump. The
thermostat should be installed with the word
FRONT up and toward the radiator. This way the
coolant has a smooth unobstructed flow through the
thermostat and water outlet. See Figure 7.
When the thermostat is incorrectly installed, as
in "B" shown in Figure 7, the thermostat valve acts
as abaffle, forcing the coolant to change direction to
pass around the valve. This change in direction interrupts
the smooth unobstructed flow of coolant to the radiator and can possibly result in overheating conditions.
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Robertshaw Thermostat [message #97060 is a reply to message #97048] |
Tue, 24 August 2010 18:52 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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On Aug 24, 2010, at 5:31 PM, Charles Boyd wrote:
>
> Hi Rob: I`m not Gene, but that is what the book says..X7425 6K6
>
> The thermostat consists of a restriction valve actuated
> by a thermostatic element. A 195° thermostat
> is used and the use of thermostats rated above 195
> degrees F. control temperatures are not recommended.
> This is mounted in the housing at the cylinder
> head water outlet above the water pump. The
> thermostat should be installed with the word
> FRONT up and toward the radiator. This way the
> coolant has a smooth unobstructed flow through the
> thermostat and water outlet. See Figure 7.
> When the thermostat is incorrectly installed, as
> in "B" shown in Figure 7, the thermostat valve acts
> as abaffle, forcing the coolant to change direction to
> pass around the valve. This change in direction interrupts
> the smooth unobstructed flow of coolant to the radiator and can possibly result in overheating conditions.
> --
> C. Boyd
> 76 Crestmont by Midas
> East Tennessee
In the manual X7525 that is shown in Figure 8.
Look more closely at the picture and you will see that the original thermostat used in the GMC had a flap that opened. It was important to put the flap so that the opening was forward.
HOWEVER, the Robertshaw Thermostat doesn't have that flap so it really doesn't matter what the orientation is. Just make sure that you get the right side up!
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] Robertshaw Thermostat [message #97097 is a reply to message #97043] |
Tue, 24 August 2010 20:53 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| Robert Mueller wrote on Tue, 24 August 2010 18:34 |
Gene,
I installed a Robertshaw thermostat when I fitted the aluminum manifold. I
did not have a copy of the manual for the thermostat when I installed it. I
installed it with the "pointy" end up (towards radiator).
I am a bit confused by what you've noted below.
I did a Google search for the Robertshaw 330-180 thermostat but have not
been able to find the manual.
Are you saying that the thermostat should be "clocked" so that a little
dimple on the flange faces forward towards the radiator?
Regards,
Rob M.
USAussie
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Rob,
The pointy side does go up. Manual was probably the wrong word. I was referring to the instructions with the thermostat. If you look at a Robertshaw thermostat on the pointy side you will see a small dimple or maybe I should say inverter dimple that goes toward the radiator. It is directly in line with one of the supports. Come by in Duquoin and I will show it to you if you can't find it. Would appreciate the visit anyway.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] Robertshaw Thermostat [message #97126 is a reply to message #97102] |
Wed, 25 August 2010 07:58 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| WD0AFQ wrote on Tue, 24 August 2010 22:32 |
Gene, you going to have candy at Du Quoin? If so park by us. Teri has me on a diet. I do get ice cream at Du Quoin but a little candy every now and then would be good too. I can't eat peanuts cuz she finds the hulls.
Dan
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Dan,
We have candy, stop by when Teri isn't watching. Don't get me in trouble.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] Robertshaw Thermostat [message #97128 is a reply to message #97126] |
Wed, 25 August 2010 08:03 |
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WD0AFQ
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
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Senior Member |
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Dan,
We have candy, stop by when Teri isn't watching. Don't get me in trouble.[/quote]
Got cha Gene. Thanks.
Dan
3 In Stainless Exhaust Headers
One Ton All Discs/Reaction Arm
355 FD/Quad Bag/Alum Radiator Manny Tran/New eng.
Holley EFI/10 Tire Air Monitoring System
Solarized Coach/Upgraded Windows
Satelite TV/On Demand Hot Water/3Way Refer
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