Different Oil Pumps

[RonLey]

Gents,

I was going through some parts and found a couple of different oil pump designs. The one that is one piece and can't have the cover removed is obviously older. The older pump has a larger discharge hole. So please educate me. I did a search on the forum and didn't find anything. I can't find my service manual.

Thanks
Ron

 

[jetmek]

so what do you want to know?

 

[RonLey]

Why was the design changed; ie the size of the opening. I am guessing that the later model is the more desirable to use? Is the one piece pump early 28?

 

[Bob C]

Here is a link to Steve Plucker's article on oil pumps.
http://www.plucks329s.org/pdf/studies/OIL_PUMP_ASSEMBLY.pdf

Bob

 

[RonLey]

Thank you Bob