It looks like this discussion is getting "hot". I think David's comment
below is how we want the sleeved unit to work. The one I bought is set to
open at 160, but does not open much. The sleeve itself never moves and based
on measurements, would not change the bypass. I don't remember where I
bought it but I think it is defective. The car stays close to 185-195
yesterday after replacement with the Stant and it was 102 outside. The Stant
allows more water to move. I know we don't want it to move to fast through
the radiator, but too slow is also not good.
Jerry
BJ8
The reason for the sleeved thermostat is to close off the water bypass that
is made into the cylinder head. The bypass is there to allow the water to
circulate when the thermostat is closed. Then when the engine is warm the
sleeve closes off the bypass thus making all the water go thru the radiator.
Also remember the thermostat does not control the high end temperature. It
is there to get the engine up to operating temperature as soon as possible.
When the thermostat is open the engine temperature is now controlled by the
radiator and fan.
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