3864480 Pulley Question

[R N.]

Hi Everyone,

It appears that I have a water pump pulley on my '66 L-72 W/O PS which is not typical. Mine does not have a p/n on it and it's center section looks like a top hat rather than a cone shape. Is the pulley I have acceptable with regard to judging?

I'd like some verification to the originals, are they cone shaped? and stamped with a p/n? Are the repos any good or I am better off with a good used one or NOS or keep the one I have?

Thanks for the input guys.

Regards,

Kurt

[Joe L.]

Re: 3864480 Pulley Question

Kurt----

What it sounds like is that you have a GM #3906656 pulley. This is the 67 pulley which replaced the 66 pulley, GM #3864480, for SERVICE in December, 1966.

The later pulley is configured differently as you describe. Some of these have p/n's on them and some don't. I don't know why.

Don't throw the one you have away, though. This is a highly sought-after pulley by "67 guys".

[Joe L.]

Re: 3864480 Pulley Question

Kurt----

What it sounds like is that you have a GM #3906656 pulley. This is the 67 pulley which replaced the 66 pulley, GM #3864480, for SERVICE in December, 1966.

The later pulley is configured differently as you describe. Some of these have p/n's on them and some don't. I don't know why.

Don't throw the one you have away, though. This is a highly sought-after pulley by "67 guys".

[R N.]

Re: 3864480 Pulley Question

Hi Joe,

Thanks for the info. I'll try to post a picture of what I have tomorrow.

Bye,

Kurt

[R N.]

Re: 3864480 Pulley Question

Hi Joe,

Thanks for the info. I'll try to post a picture of what I have tomorrow.

Bye,

Kurt

[R N.]

Joe Lucia 3906656 Pulley Picture???

Hi Joe,

Here's a picture (Clink on the link below) of the pulley I have. Can you tell from this if it is the 3906656 pulley? It's 7-1/8" OD

Thanks again for your help.

Regards,
Kurt

http://www.neimanmachinery.com/cars.html

[Joe L.]

Re: Joe Lucia 3906656 Pulley Picture???

Kurt----

Yes, that's exactly what a 3906656 looks like and it's also the correct OD. However, as one small caveat, there are some other GM pullies which look very similar to the 3906656 so I can't be 100% certain. But, I'm about 99% sure.

[R N.]

Now I know what I have...

Joe,

Now I know what I have, I only need to find the correct 3864480 pulley that I need. Anybody got an original 3864480 pulley they want to part with?

Regards,

Kurt