1965 water pump pulley

[William G.]

What is the correct water pump pulley for a 1965 L75 with air and power steering
Could someone post a picture of one.
What is the correct fan blade and what does it look like.
If possible post a picture.
THANKS
BILL

[Wayne M.]

Re: 1965 water pump pulley

What is the correct water pump pulley for a 1965 L75 with air and power steering
Could someone post a picture of one.
What is the correct fan blade and what does it look like.
If possible post a picture.
THANKS
BILL

Here's the fan #3853943, with 7 blades and distinctive tip geometry. Maybe others can say what pulley with base engine or L75 C60.

[Joe L.]

Re: 1965 water pump pulley

What is the correct water pump pulley for a 1965 L75 with air and power steering
Could someone post a picture of one.
What is the correct fan blade and what does it look like.
If possible post a picture.
THANKS
BILL

Bill-----


The pulley was GM #3850680. It was replaced by GM #3890419 and, later, by GM #3995643. The latter was available until fairly recently, but is no more.

[William G.]

Re: 1965 water pump pulley

Thanks Wayne and Joe
question. Was the pulley on the crank 2 grooves or 3
and do you know the part # on a L75 w/ac and p/s
Thanks
Bill

[Joe L.]

Re: 1965 water pump pulley

Thanks Wayne and Joe
question. Was the pulley on the crank 2 grooves or 3
and do you know the part # on a L75 w/ac and p/s
Thanks
Bill

Bill-----


I believe the application used 2 pullies, sandwiched together. The inner pulley was a 2 groove pulley of 7.33" OD and GM #3850838. The outer pulley was a 1 groove pulley of 6.69" OD and GM #3751232.

The 3751232 is still available from GM. The 3850838 was discontinued without supercession more than 20 years ago, but is available in reproduction.

[Mike G.]

Question Joe on the -838 Crank Pulley

I also have a 1965 L75 with A/C and P/S. When I researched pulley p/n's, I saw the -838 listed in the parts catalogs as the correct one for A/C. Makes sense, since the bigger diameter will move more coolant & air.

But.... I couldn't find anything in the AIM that changed the crank pulley from the base 3744043 for either L75, C60 or N40. Maybe I'm missing a page --wouldn't be the first time.

[William G.]

Re: 1965 water pump pulley

The pulley that was on my water pump was a 2 groove with the
part # 35168 and not sure about the next # believe to be a 9

Was the 608 pulley used on any other chev
Bill

[Joe L.]

Re: Question Joe on the -838 Crank Pulley

I also have a 1965 L75 with A/C and P/S. When I researched pulley p/n's, I saw the -838 listed in the parts catalogs as the correct one for A/C. Makes sense, since the bigger diameter will move more coolant & air.

But.... I couldn't find anything in the AIM that changed the crank pulley from the base 3744043 for either L75, C60 or N40. Maybe I'm missing a page --wouldn't be the first time.

Mike-----

I don't think you're missing a page. The AIM is "silent" on the rear pulley used for the L-75 with C-60 and N-40 application. This may mean that it's the same as used in the base configuration OR it could just mean that they're "silent" on it.

I would not rule out, though, that the 3744043 was used for the L-75 with C-60 and N-40 application. However, that's contrary to the information I have, keeping in mind that my information on this is not empirical.

The 3850838 part number is consistent with a late 1964 or 1965-released part. So, it would have been available for use for 1965 (but not much earlier). Also, it definitely was used for many later, small block C-60 applications.

Incidentally, the GM #3744043 pulley had a "strange" history. It was released about 1958. However, it was then known in SERVICE as GM #3747479 although it was apparently stamped 3744043. In December, 1971 the 3747479 part number was dropped and replaced by GM #3744043. So, finally, the "confusion" was ended. In fact, it's still available from GM to this day under that number-----a part that's been essentially continuously available from GM for over 51 years!!!

[Joe L.]

Re: 1965 water pump pulley

The pulley that was on my water pump was a 2 groove with the
part # 35168 and not sure about the next # believe to be a 9
On the crank the pulley is a 2 groove pulley dont know the part #
will pull off later.
Was the 608 pulley used on any other chev
Bill

Bill------


There was once a waterpump pulley of GM #351680. However, it was never originally installed on any Corvette, especially a 1965 Corvette. That's because it was not even "born" yet when your car was built.

GM #351680 was a fourth generational supercessive part number for what was originally GM #3932430. The latter was a pulley used for many 1969 and 1970 Chevrolet passenger cars, Chevelles, and Camaros with C-60. It was superceded by GM #3976059, 3995631 and then, in 1977 by GM #351680. Later, GM #351680 was replaced by GM #14023155 which remains available from GM to this very day. NONE of these pullies was ever originally used on a Corvette or, even, ever cataloged in SERVICE for a Corvette.

It's amazing how these cars get "insulted" by the installation of even functionally incorrect parts over the years.

[Joe L.]

Re: 1965 water pump pulley

Was the 608 pulley used on any other chev
Bill

Bill------


I overlooked this part of your question. The GM #3850680 pulley was used for many 1964-65 Chevrolet passenger cars, Chevelles, Camaros, and Chevy II's, with and without C-60. However, it led a fairly short life. First used for the 1964 model year, it was replaced by the 3890419 for the 1966 model year and discontinued from 64-65 SERVICE and replaced by the 3890419 in June, 1966.