Wanted W/P #s
 

I am looking for original water pump casting # for my 65 327 with bypass hose. Also if some one has a core I need one.
Thanks Kenny

Re: Wanted W/P #s
 

What casting number do you need ? Is there a date code also?

Re: Wanted W/P #s
 

I don't know the casting # the date code will need to be D of 65 The build date of truck is 5/12/65
Kenny

Re: Wanted W/P #s
 

the gm part number 3890017 was changed 3929233 which is not the casting NUMBER but it says in the books this pump was used from 1955-1967 on ALL cars and trucks 265 283 327. Then looking in Chevrolet by the numbers theres two casting numbers 3782608 1965-1968 and 3859326 1965-1968 . Im hoping this helps some. Punching the numbers into ebay shows what the pump http://www.ebay.com/itm/63-67-Corvet...db723a&vxp=mtr looks like, Looks to me like you need casting 3859326 . Jon

Re: Wanted W/P #s
 

The 3782608 cast # looks like it may not be tapped for the bypass hose, theres one other that is 3736493 which is early cast number.

Re: Wanted W/P #s
 

The date code can be a little earlier than April. The water pump would have been manufactured before the truck was built. Not sure exactly how long but a couple of months shouldn't matter.

Re: Wanted W/P #s
 

Thanks for the info on the pumps. Now I know what to look for. Very helpful thanks again Kenny

Re: Wanted W/P #s
 

Did you find a pump? I just pulled one from a 65 passenger car 283. GM #3782608 with date cast C314. Yours for the shipping from 80302.

Re: Wanted W/P #s
 

I found one about 2 years ago.

Re: Wanted W/P #s
 

i am looking for some need aug or sept 65 and april or may 66