The heater is, of course, an auxiliary mini radiator, has coils for the
collant to run through and fins to transfer the heat to the air, it even has
an electric fan with manual control, so it should and does cool the water
further, I too have turned on the heater on particularly hot drives and it
lowers temp slightly, maybe 5 degrees.
In my as yet uninsulated cockpit (have the silvery stuff, may go in the next
weekend or two) turning on the heater doesn't really further heat up the
inferno that already exists on a fully heated up car and a long drive.
Greg Lemon
54 BN1
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