The fan fills the complete core, no way of fitting a bigger one, it is a Spal unit, do not think we get a better brand name in SA. It is also located in the middle of the motor.

Once the fan kicks in, the temp drops, it is the high way driving that is causing my problem, and this is were a fan is not needed.

Also installed a temp switch that switch on at 82 degrees and of at 68degrees last night, will check it out.