Quote:
Originally Posted by JohnM
In regards to the eletric cooling fan....don't most new production cars have electric fans that can run at any time?
I have a thermostat probe in the radiator that comes on at about 190F + or -
I have cast iron heads that I understand continue to transfer heat once the engine is shut off....my water temp guage goes up when the engine is off for a few minutes and fan is not running
looking forward to hearing your thoughts
John
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The cars that come equipped with electric fans are run by thermostat/computer. Most cars have 2 electric fans for a reason. One is run strictly by the engine temperature and the other is also run by engine temp, but also has an override that switches it on and keeps it on as long as you have the A/C on....With the A/C on, you always have one fan running and the other will cycle on/off according to the water temp........they both will shut off when you turn the ignition switch off.
Regardless of the heads,be they aluminum or iron, once you shut off a fully warmed up engine, your water temp gauge will show some increase in temp, mine usually about 5 to 8 degrees over the running engine temp, that's normal, running you fan with the engine off does nothing but cool the water in the radiator, does nothing for the water in the engine itself and will not cool the engine, to do that, you would have to be circulating the water thru the engine via. electric water pump......
David