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don3527 · 10-05-2019, 10:59 AM

Do not grind the ID of the fan as this will weaken the edge of the pulley and can cause the pulley edge to break off and ruin the fan. If the bore of the fan is made bigger, there is not enough support for the pulley. The OD of the water pump snout varies from pump to pump and if the machining of the housing is slightly off center, that can cause problems as well. You have to file or belt sand the OD of the pump snout to give you enough clearance so that the fan will not rub. There are instructions explaining this that are supplied with the new fans.

10-05-2019, 10:59 AM	#10
don3527 Member Join Date: Sep 2013 Posts: 33	Re: New Two Blade Fan Do not grind the ID of the fan as this will weaken the edge of the pulley and can cause the pulley edge to break off and ruin the fan. If the bore of the fan is made bigger, there is not enough support for the pulley. The OD of the water pump snout varies from pump to pump and if the machining of the housing is slightly off center, that can cause problems as well. You have to file or belt sand the OD of the pump snout to give you enough clearance so that the fan will not rub. There are instructions explaining this that are supplied with the new fans.