1965 375 HP water pump pulley part number

[Dominic P.]

Can some please advise on the correct part number for a 1965 327-375 H.P. water pump pulley.
If you have a photo of an original pully for this application, that would be apprecited as well.
Thanks,
Dominic.

[Michael H.]

Re: 1965 375 HP water pump pulley part number

Dominic,

The GM part number is 3770245. The part number may be stamped on the face of the pulley.

[Dominic P.]

Re: 1965 375 HP water pump pulley part number

Michael,
Thank you!...whatever details you can supply would be appreciated!
Dominic.

[Michael H.]

Re: 1965 375 HP water pump pulley part number

Michael,
Thank you!...whatever details you can supply would be appreciated!
Dominic.

Here's a link to a picture of a new 3770245 pulley.

https://www.forums.ncrs.org/attachme...6&d=1319683458

[Dominic P.]

Re: 1965 375 HP water pump pulley part number

Michael,
SUPER!!!!
Thank you,
Dominic.

[Wayne M.]

Re: 1965 375 HP water pump pulley part number

Michael,
Thank you!...whatever details you can supply would be appreciated!
Dominic.

Here's a pic of one off a '64, no stamped part number on this particular one. Note the lip at the bottom of the cone, where the outer groove was pressed on [at least I think that is how it was done]. Off hand, I'm not aware of other pulleys that have this feature.



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[Joe L.]

Re: 1965 375 HP water pump pulley part number

Michael,
SUPER!!!!
Thank you,
Dominic.

Dominic-----

The GM #3770245 pulley was actually still available from GM until about 5 years ago when it was discontinued. I think it's available in reproduction and there should be a number of used or NOS pieces around.

[Dominic P.]

Re: 1965 375 HP water pump pulley part number

Wayne,
Great Photo!!!
Thank you,
Dominic.

[John M.]

Re: 1965 375 HP water pump pulley part number

Heres another one

[Michael H.]

Re: 1965 375 HP water pump pulley part number

Heres another one

John,

I see your pulley has the GM part number. I wonder if the later issue pulley had the number but originals may not have had it??

Can I comment on some of your other parts in the picture?

[Michael M.]

Re: 1965 375 HP water pump pulley part number

Michael, all the #3770245 pulleys I have and seen have the part number stamped into the pulley. Some stamps are deep and some stamps are very faint. Maybe the picture of Wayne's pulley the part number is so faint its hard to see.

[Michael H.]

Re: 1965 375 HP water pump pulley part number

Michael, all the #3770245 pulleys I have and seen have the part number stamped into the pulley. Some stamps are deep and some stamps are very faint. Maybe the picture of Wayne's pulley the part number is so faint its hard to see.

You're probably right Michael. I wasn't sure if all had the number.

[John M.]

Re: 1965 375 HP water pump pulley part number

Hi Michael,
I just painted that pulley a week ago but it's been on the car since at least 1986.
Yes, I'll be asking you to comment on as many parts as possible as I go forward. Those parts in the background are the steering column bracket and clamp on the firewall and the clutch boot retainer and hardware. More pictures later.

[Alan D.]

Re: 1965 375 HP water pump pulley part number

No part number on my Mar64 pulley (owned since 67)

[Michael H.]

Re: 1965 375 HP water pump pulley part number

No part number on my Mar64 pulley (owned since 67)

Alan,

Thanks, I thought I remembered some of these without a part number stamped.

Looking at the original print for the 3770245 pulley, it appears that the the code, and possibly the part number were added on 19 Sept 65. (hard to read the small print)

I would be interested in more info on this from other 63-64 owners with originals.