30 Apr 2012, 10:43
Hi Brian. I am running 12mm for the aircon and 10mm for the alternator/water pump. The reason for this is my pulleys are different depths. In my opinion a 10mm would be too loose and not fit in the aircon pulley snug... where as a12mm on the alternator would be too fat and end up chamfering the belt egdes hence needing future and rwgular adjustment as it beds down in... just my opinion but others may disagree! ;-)