[SpudRider]

Originally Posted by katflap

That is strange , I will double check when I get chance to make sure I have got it the right way around.

I wonder if it's because the fan blows back the heat coming from the exhaust header pipe as well as the heat from the radiator

Originally Posted by Juanro

Just checked to be sure.. pipe joining right side radiator and water pump seems to entering it at the center, meaning it's "drawing" coolant from r.s. radiator... that's why I assumed that flow was as per your diagram.

Thanks for posting the additional information. I believe you gentlemen are correct.

The following video indicates the coolant enters the eye of the centrifugal water pump, and flows out the other passage. Because of the orientation of the vanes on the impeller, I was under the mistaken impression the coolant flowed in the opposite direction.