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10-4 mister gasket, same thing.
i started using them them years ago when pep boys sold robertshaw and went to the mister gasket when they stopped selling them.
they flow more when opened and also open the other direction. (with the coolant flow instead of against the flow)
... and also open the other direction. (with the coolant flow
instead of against the flow)
No, the Robertshaw style of thermostat moves downward into the
t-stat cavity against the direction of flow, just like the conventional
poppet style thermostat.
The real actuation points of some thermostats are at variance
with their advertised actuation points. Both the RS and the Stant
below are rated for 195º. Guess which one might seem more
effective ...
When you look at a gas appliance - furnace, hot water heater, stove, etc. - there's a good chance the gas valve is a Robert Shaw. They also make controls for appliances. First rate company. Had no idea they made anything automotive.
I'm sure Robert Shaw knows his stuff but I don't mind a little more back pressure that the ol' poppet style brings to the table since it makes me "feel" the block has no air gaps/pockets in it do to the restriction level. I'd much rather think the block might have too much pressure with a poppet rather than less with a "hi-flowing" T stat.
Last edited by engle1147; May 16, 2009 at 12:25 AM.
Yeah... Bush was the one who traded nuclear tech to india for MANGO's. McCain said " I'm the biggest free trader of all" . It's both parties out to screw us, not just the dems.
As many in this thread appear not to know, the thermostat the
OP is interested in was developed by a company created by
Frederick Robertshaw - not "Robert Shaw"
Frederick Robertshaw invented a gas heater control in 1899 and
established a company in 1907 which later came to be known as
the Robertshaw Thermostat Company of Pittsburgh.
Together with Weston Fulton of the Fulton Company, Frederick
Robertshaw gets the credit for creating climate control systems
responsible for making work and home environments of successive
generations much more comfortable than previously possible.
tim, not all mexicans want your job and certainly NOT all Palestinians are muslims or terrorists. Your comments need to be revised and you should not be saying stuff like this.
I am a Palestinian American and I am a christian and not a muslim or a terrorist. I own a 1986 C4 and a 2007 Z06 and work on both ALL the time. Truthfully, I am offended by your remarks and although I'm tempted to hit you back with a couple of nasty descriptions, I won't. You should blame the white american CEO's who make 15 million dollars as a bonus then send your job to Mexico. Don't blame the poor mexicans. You should also blame bush for 118000 guest worker visas to india every year. Are you mad at indians too ???
I'll leave it up to you to re-consider your remarks about people whom you obviously know nothing about.
Back to the topic. Robert Shaw thermostats that you buy from ecklers (and you should'nt buy from ecklers) have three little holes pre-drilled in them and will allow a "constant" amount of flow even when closed. They are designed that way and the opening temprature is a gradient really and not an absolute figure. The thermostat doesn't just "open" at 195 or 180 or whatever, it just starts to open MORE at that temp. Call stewart components and they will tell you that. They sell the modified good ones.
Be careful if you have a high flow water pump like a flowkooler or stewart, the three holes will then be a MUST.
I got the 180* AC delco and new gasket. I have the 195* in it now. Thanks guys for the input. I don't have a aftermarket waterpump. Just a new stock one.
Tim, not all mexicans want your job and certainly NOT all Palestinians
are muslims or terrorists. Your comments need to be revised and you
should not be saying stuff like this.
I am a Palestinian American and I am a christian and not a muslim or
a terrorist. I own a 1986 C4 and a 2007 Z06 and work on both ALL
the time. Truthfully, I am offended by your remarks and although I'm
tempted to hit you back with a couple of nasty descriptions, I won't.
I'll leave it up to you to re-consider your remarks about people whom
you obviously know nothing about.
Well said.
Originally Posted by combustables
Back to the topic. Robert Shaw thermostats ...
The name is Robertshaw. One word.
Regarding bleed holes in thermostats. Two functions these serve
is to prevent air pockets from forming under the thermostat and to
facilitate more uniform engine warm up. If the "pill" or motor of the
thermostat is isolated by an air pocket from immersion in coolant,
then it is less likely to actuate the t-stat. If a sealed t-stat
prevents coolant circulation, then heat must travel by conduction
alone from local hot spots to the area of the t-stat to warm the "pill"
and initiate opening.
Some t-stats are provided with holes. It is a simple matter to drill
one or more holes in a t-stat that does not have these.
I only got the 180 for my tune. I have had a 160 before and the
car ran way to cold in the winter, fall, and cold days.
Look again at the captions for the pictures in post #5, as well
as the position of the valve.
By testing your t-stat you will know with certainty when it begins
to move and when it is fully open. If it is marked 180ºF but begins
to move at 155º and is fully open by 165º, then it may contribute
to engine behavior that is unsatisfactory.