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Tech Editor's DeskProjects, papers, writings, thoughts, musings of our technical editor Joe Padavano. To begin with, he will be making threads and can approve posts to it if he wishes. This can be changed in the future if it does not work out well.
Ok.. so did some more checking with ALL the autoparts stores and even called A1 Cardone direct and spoke with them..
This pump is OBSOLETE and will no longer be produced.
So, I am guessing the only option is to use the shorter pump and find a pulley that will work?
Since there is a .70" difference and the stock pulley is about 2.3" from hub to center of the groove. One would need a 1.6" hub to center pulley with the 5/8" pilot hole.
The original GM part number is 1389457. If you Google that, you will find some N.O.S. pumps, but be sitting down when you look at the price. Have you considered rebuilding your original?
In any case, here is 1389457:
Here is the A/C pump. The only difference appears to be the shaft length.
This is the pump for a 1964 Buick 300, available at RockAuto and other parts stores. I don't have the hub height measurement, but that shaft appears to be long enough to allow the hub to be pressed closer to the tip if need be.
The original GM part number is 1389457. If you Google that, you will find some N.O.S. pumps, but be sitting down when you look at the price. Have you considered rebuilding your original?
In any case, here is 1389457:
Here is the A/C pump. The only difference appears to be the shaft length.
This is the pump for a 1964 Buick 300, available at RockAuto and other parts stores. I don't have the hub height measurement, but that shaft appears to be long enough to allow the hub to be pressed closer to the tip if need be.
No luck finding the pump except at the Buick farm for a very high price.
I think I will just machine up a .70" hub spacer. I think this will be the easiest, since finding the right pulley is also proving to be a bit difficult.
Seems very odd that they would make the NON A/C pump obsolete and continue with the A/C pump?
The original GM part number is 1389457. If you Google that, you will find some N.O.S. pumps, but be sitting down when you look at the price. Have you considered rebuilding your original?
In any case, here is 1389457:
Here is the A/C pump. The only difference appears to be the shaft length.
This is the pump for a 1964 Buick 300, available at RockAuto and other parts stores. I don't have the hub height measurement, but that shaft appears to be long enough to allow the hub to be pressed closer to the tip if need be.
Joe
Never looked very closely but the 3.8 buick V6 has the same front cover. I am sure you would know how close the water pump is. Look forward to your reply.
Ken