C2 40083 fuel pump

[Jim R.]

can anyone tell me all of the markings of an original hp 40083 fuel pump ,was the bottom cast or stamped steel ,is it marked on the bottom ,with fuel derection (IN)

(OUT) also are there any AC markings, i am cosidering buying one but dont want to get taken. thanks fellas. 1965 365 hp car

[William C.]

Re: C2 40083 fuel pump

Either bottom is acceptable, yes the inlet and outlet are marked. The top is also unique, both in color due to the material used, and the configuration. Cast bottoms will carry the AC logo molded in, the stamped bottoms do not.

[Donald T.]

Re: C2 40083 fuel pump

Here are some pics of the 40083.

[Donald T.]

Re: C2 40083 fuel pump

Pics of 40083

[Donald T.]

Re: C2 40083 fuel pump

Pics of 40083

[Paul G.]

Here's the other style *NM*

[Larry L.]

Re: Here's the other style

Nice set of pictures.

I got out a few spares and checked them with pictures and they are identical.

Other minor problem is that GM on service replacements in the late 60's provided you with a brass "L" fitting to connect fuel inlet to supply line on frame. The steel "L" fitting is orig.and hard to find. My 65 FI and 365 both have the steel "L" fitting, it is Zink plated and not cadnium
The pump material was magnesium. That is why is was so light. The bottom cast cover was from early cars, My late 66 and 66 service replacement has stamped cover. Later service pumps looked identical but were heavy due to use of pot metal. They are cosmetically nearly identical and unless its off the car to check weight you can't tell the difference.

[Jim R.]

Re: C2 40083 fuel pump

Don should your pump have IN marking on the inlet side.