Rebuilt oil pump

Rusty · February 07, 2016, 04:37:28 PM

I had my oil pump rebuilt about 2 years ago during the engine rebuild. It has a total of 200 miles. The oil pump shaft broke and caused the cast iron housing to brake. I found a spare engine strip for parts and got a good oil pump core. I plan to pull the "fingers" from the rebuilt pump and use them in the parts engine core. The question I have is, should I hone the housing or not? The fingers you can see in the photo are not sharp but well rounded, so it must have some wear on it.

Rusty · February 07, 2016, 04:49:12 PM

How is the drive gear held on? Is it will a roll pin or just the nut?

Rusty · February 08, 2016, 10:41:41 PM

I broke off the T brass fitting on the top of pump. The one that goes to the vacuum canister.

Rusty · February 08, 2016, 10:42:54 PM

I drilled out he fitting and then used a easy out

Rusty · February 08, 2016, 10:43:48 PM

Easy out

Rusty · February 08, 2016, 10:45:27 PM

I removed the nut with a cordless impact wrench. The gear is held on by a slotted key way. A puller and some heat and the gear came off.

Rusty · February 08, 2016, 10:46:22 PM

Fancy puller

Rusty · February 09, 2016, 08:38:57 PM

The inside of the cast iron housing was very smooth. I did hone with a brake hone to break up some of the glaze. I then noticed that the cover plate is difference between the two. Both interchange sort of. One is a smaller plate and you can see how it does not fit the housing completely. They both will work for a oil pump. The cover plates are different. I figure one is 29 other is

?

Rusty · February 09, 2016, 08:42:17 PM

Cast iron case is larger. It will work as a function oil pump.

chetbrz · February 09, 2016, 10:05:29 PM

Hi Rusty,

It's been quite a while since I took one of these pumps apart. I have not tried to take the gear off. I would have thought that a scroll pin or something would be holding the gear on. I guess it is press fitted.

I don't recall the fingers your photo is showing. I know the steel eccentric is the impeller for the pump and vacuum. The fingers might help provide a cavity seal. As for the two covers the screw alignment looks the same.., how about the other side of the plate ? I wouldn't horn the chamber just clean it. Horning might make the pump less effective.

My 2 cents. Thanks for all the photos,

PS... Nice work. You always come up with a creative way to fix a mechanical issue.

Chet...

News:

Rebuilt oil pump