1919 water pump

[jerry1centmi]

Hi fellow Dodge lovers. I posted earlier that I needed a water pump to replace the one that I turned the threads off the LH thread side. At the time I was recovering from knee surgery and could not get to my spare parts. I bought this car about fifty years ago and some spsre parts were thrown in. Last week I was finally able to get to the parts and thank god a water pump was in the box. I need help with as the spare pump has pack nuts are 1 1/4 threads where as the broken one is 1 1/8. The pump measures out the same except it has different part numbers. The impeller on the new pump is keyed at 1/8 where the broken pump is 3/16. Why is there a difference? I will need a new shaft and in the earlier post someone nentioned Roys or Meyers but I don't have their phone nunbers. I would appreciate any help.

[nearchoclatetown]

What do you measure over the hex on these pumps?

[vergil]

Aside from nearchocolatetown, who is an excellent source, I find that Tom Myers is also a great source (734-856-1207).

[nearchoclatetown]

Don't call me names , I have no idea what the answer is.I have to measure a few engines that are already assembled, can't get to the threads. Between my neighbor and me we have a pretty good selection of years.

[jerry1centmi]

The hex for the 1 1/8 thread is 1 9/32 and the 1 1/4 is 1 7/16