Gap Size Between Fan Blade And Radiator

[mhjo]

What is the ideal distance between fan blade and radiator?

I have 3 row stock radiator and mechanical clutch fan with large plastic fan shroud.

 

[tos]

The fan shroud kinda eliminates any need for getting the fan real close to the radiator. It forces the air thru the radiator at the same volume and rate as long as the fan is inside the shroud. If you didn't have a shroud then that's a different story. Anything less than about an inch you risk the fan flexing and chewing up the radiator depending on the fan.

 

[rbohm]

i generally like to have at least an inch between the fan and the radiator.

 

[mhjo]

Thanks!

 

[7991LXnSHO]

Are you running a hoop or shroud?
While you answer that, I will look for the related answer

 

[7991LXnSHO]

http://www.carid.com/images/flex-a-lite/cooling-systems/pdf/1518-installation-instructions.pdf

The distance from the radiator is not super important if you have a shroud. Then it becomes about tip wash and how far the blades are in/out of the shroud. With no shroud, I have read about an inch clearance to the radiator.