Ran into an interesting project. A friend of mine has a 1922 Dodge and asked me if I would look at his leaking water pump. He thought some new packing would do the trick. I told him that I did not think there was enough packing on the planet to seal this shaft. It was rather hysterical and made my day to see this. The impeller repair was rather interesting as you can see and I suspect the engine was over heating. The original shaft is about 1-1/2 thousandth under a standard 5/8”. The drive gear appears to be a shrink fit to the cut down shaft size and he just bought and showed me a shinny new shaft at 5/8”. My theory is that perhaps Dodge bought cheap steel, took a skim cut then bored the impeller and drive gear for a clearance fit. On the upside, if I bore to a standard 5/8”, the existing bearings cleanup nicely. I still have to determine the clearance to fit the impeller and drive gear. I’m thinking a quarter thousandth.
Clearance fit 1922 Dodge water pump
- Thread starter DJoksch
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You MIGHT be able to stuff enough packing around that shaft to get it to seal, it would NEVER turn, but it might seal. It looks like there are cross drilled holes in that shaft, was something pinned on there?
I think you hit on the fix! You never know what you will find after 100yrs of abuse and home farm repair. The cross drilled holes were added at some point . The impeller is not original either but will work. I cut a keypad and will press it into place. Filling the wear spot was interesting. The drive gear had to be pressed out and did not have a pin. The non damaged portion of the shaft under the drive gear is where I figured out that the shaft was undersized. If I open the drive gear to a press fit, I can also ream and use the exiting bushings.
