-------------- Original message --------------
From: sosmi@xxxxxxxxxxx
Dan, the smaller diameter pulley does turn faster, however the wp impeller for a/c cars are smaller diameter, and have less blades. A/C pump 3.5"- 6 vanes, NON A/C 4.38"- 8 vanes, and if I can recall, the PS pump belt is first to go on . If the WP pulley is too close to the crank pulley, you'll have to remove it to change belts? Somebody with a 67 could tell. Dave.-------------- Original message --------------
From: therichardsonfamily@xxxxxxxxxxx
Dave & Dave:The grind it down idea will work (and I already came up with that "dumb idea"), if I need to go that route. I just want to confirm that a 6 & 1/2" diameter is correct. Smaller diameter would turn the water pump faster. With AC, I want to be sure of the measurements.Other Dave - it is a single pulley, with an idler/tensioner pulley off on the passenger's side.Dan Richardson300L Family Heirloom-------------- Original message --------------
From: "Dave Wilker" <wilkerbeast01@xxxxxxxxxxx>
DanOne idea (probably a dumb one) is to take your pretty new pulley to a machine shop and ask them to shave it down a bit for clearance. It may make a difference if your pulleys are not perfectly aligned (It might be easier to jump off) but like I said, it is an option. I have seen a few engines that have very little clearance between the pulleys, way less than the thickness of the belt, for instance.
David C. Wilker Jr.
USAF (RET)----- Original Message -----To: IMLSent: Wednesday, December 13, 2006 9:28 AMSubject: IML: water pump pulley diameter?Hello everyone:What is the exact outer diameter of the water pump pulley for a '67 Imperial, 440cid, with AC, single belt?I spent $80 (too much!) for a new aluminum one (way too pretty!), that barely doesn't fit. Parts man said it was 6 & 1/2" diameter - it actually measures 6 & 11/16". I think 6 & 1/2" would fit with a clearance on the crank pulley of 1/16"Do those measurements make sense? Is there really only 1/16" clearance between the crank pulley & the water pump pulley? Is 6 & 1/2" the correct diameter for the water pump pulley on this engine?Thanks in advamce for any insight offered.Dan Richardson300L Family Heirloom