Hey guys I am trying to repair my water pump on my GB it was leaking coolant into the oil so I disassembled the front end obtained correct seals from welters all of that would be fine and dandy except for when I took the impeller off the end of its shaft I noticed it has made contact with the water pump housing. The book says I should have a nominal amount of end play in the shaft where as I have close to 1/4 inch enough where the lip seal backs away from the carbide seal surface I am assuming this is what is causing water to leak into the engine oil. So I guess my question is what controls the end play in the ignition drive shaft I can’t tell from the book? Also at the opposite end of the water pump shaft is where my hydraulic pump is driven. As always any help is greatly appreciated