Sucking or Blowing?!

[abw280]

Taken the Rad off my 280 for a re-core (nose mounted type).

The fan is fitted behind the rad - thought I might as well check it over whilst rad was removed - is it normal for the fan to "suck" air through rad instead of blowing air through??

Has it been mounted the wrong way round?

[davidf]

I'm no expert, but I'm pretty sure it sucks. Otherwise it would be blowing against the air-flow when the car is moving.

[Schazzar]

Definitely should be sucking. The fans are shaped to suck in cooler air through the rad as the hot water passes through the veins. Hot water though the top, cooler water out the bottom and back into the engine thus keeping it cool...supposedly!

[Dave_H]

It should suck cool air through, if you think about it, it's doing the same job as if the car were moving (assuming fans come on when car is hot when stationary)

[JMorgan]

Yep, front to rear for the flow. If the fan is blowing the wrong way then reverse the wires. At least that is what I have done to fans in the past unless there are special motor types around that don't like that. If your car blows up its not my fault and I never said this

>> Edited by JMorgan on Sunday 14th July 22:13

[abw280]

Thanks Guys! I'll stick with the sucking after all!!

[wedg1e]

Just a small point, but as the fan blades are shaped to create airflow, then reversing the wires, although it will work to some degree, will not be very efficient.
In effect it's like sticking the rotor blades on a helicopter upside down....

Ian

[JMorgan]

It was just a point incase the wires were reversed already.