W.E., understood. No question about which drive belt goes to which groove.
The question is whether the pulley grooves themselves are different widths.
The belt widths are definitely different, A/C being the 1/2" width.
Andre sold a pulley that apparently has same width grooves. The customer believes the front groove should be wider than the rear groove, since it turns the 1/2" wide belt.
If the '64 A/C water pump pulley should have 2 different width grooves, then apparently the one Andre sold is incorrect. I am not sure. Just because the belt widths differ, not sure that means the pulley groove widths differed.
From what I can tell, Pontiac did not have too many 2 groove water pump pulley applications where the front groove dia. was smaller than the rear groove dia. and from what I can tell, they all used a 1/2" wide front belt and a smaller width rear belt. If Andre's pulley has 2 same width grooves, it isn't clear what it might have come off of if the Pontiac pulleys did have 2 different width grooves.
Do you have a '64 A/C water pump pulley to check? I guess what Andre needs to know are the groove width measurements to compare with the one he sold.
|