Chris: Thanks for the info. I have learned quite a bit about the theory behind the engineering on this subject. Your measurement confirms what I've learned. In a nutshell, the water pump impeller has a smaller diameter for an AC car. The smaller diameter pulley on an AC car causes the water pump to spin faster. It would appear that a 6&1/2" pulley only belongs to a non-AC car. Thanks again for everyone's help. (I think I sent this in "plain text" - sorry for the mess before) Dan Richardson 300L Family Heirloom
--- Begin Message ---
- From: "Chris Strohmeyer" <chrisstroh@xxxxxxxxxxx>
- Date: Thu, 14 Dec 2006 07:18:25 +0000
Hi Dan,I'm a proud owner of a 67 imperial convertible with the 440 and AC. My measurement of the water pump pully is VERY close to 5-1/8" diameter. Yours is way too big.Chris----- 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
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