Robert shaw thermostats?
Thread Starter
Safety Car
Joined: Jul 2008
Posts: 3,966
Likes: 4
From: Made In America
St. Jude Donor '10-'11
The truth hurts. Am I going to get slandered by Optima now for using my warranty on three separate occassions? Sjeez people, come on!
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
something about the design keeps from pressure building up
on one side that could cause a poppet style stat to close.
For air to escape from being trapped beneath a closed t-stat, my
vote is that it must be able to leak past where the valve seals to
the housing or through a bleed passage such as a drilled/punched hole
or a stamped notch. If the air pocket is large enough to prevent
the t-stat motor from being immersed, it will make it difficult for the
t-stat to activate on its own to bleed the air - trying holding a
t-stat above boling water to see if it will open.
I believe the claim that the RS design is less prone to being closed
by pressure is based on the "measuring cup"-shaped valve - coolant
flows out past the base, around the sides and then inward over the
top of the "cup". The arguement may be that the flat disk-shaped
valve of the Stant-style conventional t-stat does not encourage
flow around the valve in the same manner.
There are many of the Stant-style t-stats in service.
By the way, is a spring in the lower radiator hose necessary?
They don't make them anymore, so if I was to find one, then it
would be $60-$70 when you factor in shipping. I could get an
upper and lower Napa hose for less than that.
My upper hose does have a spring in it for some reason. Never
heard of that before. Though, my lower hose doesn't have a spring
in it. I was looking at replacing the hoses when I flush the system.
They don't make them anymore, so if I was to find one, then it
would be $60-$70 when you factor in shipping. I could get an
upper and lower Napa hose for less than that.
My upper hose does have a spring in it for some reason. Never
heard of that before. Though, my lower hose doesn't have a spring
in it. I was looking at replacing the hoses when I flush the system.
from pump suction. Perhaps a second spring may be present in the
upper hose to provide support against sagging, but my vote is that
it would be unusual for there only to be a spring in the upper hose.
Perhaps the hoses were replaced at some time in the past and the
OEM spring from the lower hose was reinstalled in the upper hose?
.
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Joined: May 2009
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From: Arkansas
Melting Slicks
Joined: Nov 2004
Posts: 2,799
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From: Cape Coral FL
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Race Director
Joined: Jun 2004
Posts: 13,957
Likes: 706
From: WI
A spring helps ensure that the lower return hose does not collapse
from pump suction. Perhaps a second spring may be present in the
upper hose to provide support against sagging, but my vote is that
it would be unusual for there only to be a spring in the upper hose.
Perhaps the hoses were replaced at some time in the past and the
OEM spring from the lower hose was reinstalled in the upper hose?
from pump suction. Perhaps a second spring may be present in the
upper hose to provide support against sagging, but my vote is that
it would be unusual for there only to be a spring in the upper hose.
Perhaps the hoses were replaced at some time in the past and the
OEM spring from the lower hose was reinstalled in the upper hose?
No spring, maybe it turned to rust..
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
I run a Robertshaw 180 in my 409 and it solved the overheating issue, due to better flow and/or control that the Stant. I may not have needed either the BeCool radiator or the FlowCool pump after all.
FlowCool support told me the thermostat cycles open and closed to contro lthe amount of time the coolant stays in the engine and in the radiator. High flow pumps can cause or exacerbate cooling problems if the water does not stay in the engine long enough to absorb heat, or in the radiator long enought to dump it.
Other than testing if a thermostat is operating, I fail to see how testing a new one has any value.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Partial Quote:
FlowCool support told me the thermostat cycles open and closed to contro lthe amount of time the coolant stays in the engine and in the radiator. High flow pumps can cause or exacerbate cooling problems if the water does not stay in the engine long enough to absorb heat, or in the radiator long enought to dump it.
++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++
FlowCool support needs to get an education on how automobile liquid cooling systems work and it has nothing to do with time spent in engine or radiator. A wide open thermostat allows for maximum cooling, a closed thermostat allows for maximum heating. In a wide open thermostat, the coolant temperature will stabilize when the radiator gets rid of heat as fast as the engine makes it.
FlowCool support told me the thermostat cycles open and closed to contro lthe amount of time the coolant stays in the engine and in the radiator. High flow pumps can cause or exacerbate cooling problems if the water does not stay in the engine long enough to absorb heat, or in the radiator long enought to dump it.
++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++
FlowCool support needs to get an education on how automobile liquid cooling systems work and it has nothing to do with time spent in engine or radiator. A wide open thermostat allows for maximum cooling, a closed thermostat allows for maximum heating. In a wide open thermostat, the coolant temperature will stabilize when the radiator gets rid of heat as fast as the engine makes it.
Thread Starter
Safety Car
Joined: Jul 2008
Posts: 3,966
Likes: 4
From: Made In America
St. Jude Donor '10-'11
Partial Quote:
FlowCool support told me the thermostat cycles open and closed to contro lthe amount of time the coolant stays in the engine and in the radiator. High flow pumps can cause or exacerbate cooling problems if the water does not stay in the engine long enough to absorb heat, or in the radiator long enought to dump it.
++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++
FlowCool support needs to get an education on how automobile liquid cooling systems work and it has nothing to do with time spent in engine or radiator. A wide open thermostat allows for maximum cooling, a closed thermostat allows for maximum heating. In a wide open thermostat, the coolant temperature will stabilize when the radiator gets rid of heat as fast as the engine makes it.
FlowCool support told me the thermostat cycles open and closed to contro lthe amount of time the coolant stays in the engine and in the radiator. High flow pumps can cause or exacerbate cooling problems if the water does not stay in the engine long enough to absorb heat, or in the radiator long enought to dump it.
++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++
FlowCool support needs to get an education on how automobile liquid cooling systems work and it has nothing to do with time spent in engine or radiator. A wide open thermostat allows for maximum cooling, a closed thermostat allows for maximum heating. In a wide open thermostat, the coolant temperature will stabilize when the radiator gets rid of heat as fast as the engine makes it.
That was funny.
Thread Starter
Safety Car
Joined: Jul 2008
Posts: 3,966
Likes: 4
From: Made In America
St. Jude Donor '10-'11
I can't believe this thread is still going on a month later. Geez guys,
Instructor
Joined: Apr 2002
Posts: 169
Likes: 1
From: Newark De
I'm using a 190 degree unit out of a Ford Diesel pickup. Seems pretty well made and we all know how hot diesels get. Can get it from CarQuest for about $13.00 and it's similar to the Robertshaw piece. Has a rubber coating on the outside perimiter and has a vent hole already drilled. My dad has a diesel Cadillac and he turned me on to it. Seems to keep the car cool too.........
Any interest in seeing it I'll see if I can't dig something up.
Any interest in seeing it I'll see if I can't dig something up.