Reply to "Some good...some bad! It passed the MoT test ... But it over heated on the way home."

lf-tp2511Member

quote:
when the T-stat reaches temp & opens, the warm-up circuit gets shut off & all coolant gets sent to the radiator. or a tank somewhere

Actually, the hat on a Cleveland thermostat does not totally seal the bypass plate. There is, even at full operating temperature, a certain amount of coolant that remains bypassing within the engine block. The Cleveland bypass is internal, but other small block Ford's have an external rubber hose bypass that constantly allows a set amount of coolant to bypass being sent to the radiator.

Larry

Note the small ninety degree hose in this photo.

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6/24/1510:54 PM

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