Re: rad operating temperature

Posted by Buzz Pound on June 22, 1997 at 23:46:55

In Reply to: rad operating temperature
posted by Wayne Parker on June 21, 1997 at 20:43:55

Wayne - My experience is with Model T Fords, but it is probably applicable.I have a 180 degree thermostat, a direct reading temp gauge and a Motometer up at the radiator cap.I also use a non-pressurized coolant recovery system so that the Motometer is always in water at the top of the radiator.The gauge and the Motometer have been cross calibrated so that I know how accurate they are.The top of the radiator almost always reads higher than the direct gauge at the head outlet.This appears to be due to the hottest water going through the thermostat bleed hole and, being lighter, collecting at the top of the radiator due to the very low flow with a closed thermostat.This minor flow is probably very smooth and laminar so that it does not mix with the other water in the outlet hose on its way to the radiator.I have checked this several times and have used a temperature probe to confirm my observations.You are probably seeing the same thing and all is working fine.



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