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.
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
www.britishcarspecialists.com
..
..
On Jul 14, 2009, at 8:02 PM, Jerry Costanzo wrote:
> I wanted to give some feedback on the thermostat/ heating issue. I
> pulled the sleaved thermostat and tested it in a pot of water.
> While it did start opening at 160, it was not fully open till about
> 185 and the opening is limited.
> I put in a modern Stant themostat and the car runs cooler. I think
> the sleaved model was restricting flow.
>
> Jerry
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