Re: ’60s Johnson water pump – Freeze Damage

[Don]

The important thing to remember while making the repairs is that the impeller plate must fit flat against that surface, or exhaust will be drawn into the pump. None of those broken pieces are against the outer wall of the pump/housing surface, so you don’t have much to worry about except making sure the repaired pieces do not sit up too high causing the impeller plate to be distorted or create a sealing problem.