water pump pulley diameter?

[therichardsonfamily@xxxxxxxxxxx]

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

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• 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 -----

From: therichardsonfamily@xxxxxxxxxxx

To: IML

Sent: Wednesday, December 13, 2006 9:28 AM

Subject: 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 Richardson

300L Family Heirloom

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