Does the stock fan run off the crank but ecu controlled?

Aren't viscous couplings temperature controlled ?

 

See http://en.wikipedia.org/wiki/Viscous_coupling_unit

Edited January 21, 200917 yr by TonyB

Aren't viscous couplings temperature controlled ?

 

See http://en.wikipedia.org/wiki/Viscous_coupling_unit

 

Intersting read! i was told they were ecu temp controlled?

Jeff ?.......... any help ?????

viscous coupling is purely mechanical - the aux fan is ecu controlled tho.

viscous coupling is purely mechanical - the aux fan is ecu controlled tho.

 

So the stock fan is viscous?

So the stock fan is viscous?

 

Yep - it's like an automatic clutch if you like.

Yep - it's like an automatic clutch if you like.

 

Correct. ;)