Reply to "Question About Coolant Bypass Restrictor Plate"

lf-tp2511Member

As for the bypass system on other Ford small block engines, yes it is accomplished with an external hose. And yes, that coolant bypass is always active on those engines.

MANY years ago John Christiansen did an analysis of the OEM bypass plate and thermostat hat that showed the hat is not designed to completely block off the passage, but instead allows a coolant flow that is very similar to the coolant flow provided by the external hose.

somewhere in my files I might still have John’s calculations, but highly doubtful I can locate them at this time.

Larry

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10/11/228:17 AM

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