question about my radiator fan

mcarver423 · 07-06-2011, 06:31 AM

i have a 08 vstar 1300 ive only had it for a couple of months i noticed at a red light when it is really hot my fan will kick on and i can hear and feel the blower motor i havent heard it coming on in a couple of weeks but it has been cooler outside should it come on all the time or only when really hot?

turbotodd · 09-13-2011, 10:36 PM

It works off of engine coolant temperature.

a couple things come into play here. The engine has fins on it, which do help dissipate heat. In hotter air, the engine temp increases some...and the fins can't dissipate the heat as fast. When the air cools down, the fins help dissipate engine temperature faster when combined with the coolant flowing through the radiator, the coolant doesn't get as warm, and won't turn the fan on nearly as often.

07-06-2011, 06:31 AM	#1
mcarver423 Join Date: Jul 2011 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	question about my radiator fan i have a 08 vstar 1300 ive only had it for a couple of months i noticed at a red light when it is really hot my fan will kick on and i can hear and feel the blower motor i havent heard it coming on in a couple of weeks but it has been cooler outside should it come on all the time or only when really hot?

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09-13-2011, 10:36 PM	#2
turbotodd Join Date: Sep 2011 Posts: 9 Thanks: 0 Thanked 2 Times in 2 Posts	It works off of engine coolant temperature. a couple things come into play here. The engine has fins on it, which do help dissipate heat. In hotter air, the engine temp increases some...and the fins can't dissipate the heat as fast. When the air cools down, the fins help dissipate engine temperature faster when combined with the coolant flowing through the radiator, the coolant doesn't get as warm, and won't turn the fan on nearly as often.

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