Water pump internals

Yes! Rather! Maybe you can convert from the late two-piece-seal to the one and only reliable one-piece-seal.

Can you show another picture with the back of the impeller?
The "washer" between circlip and and inner bearing actually is a leaf spring washer. The spacer between inner and outer bearing is a simple part everyone with a lathe can make in ten minutes.(ID 15mm, OD 20mm, L=36mm

Best
Martin

 

It's unnecessary, because with the big bearings pumps the seal was the problem, not the bearings. And a leaking seal with a clogged weep hole destroys the bearings. No matter how many.
But when someone insists on a third bearing, what makes the whole situation statically overdetermined btw, you even need two spacers, 11.5mm long each. See my CAD screenshot. Without spacers it is a complete hack job and I wonder, how the pulley can be fastened tightly. Without spacer(s) between the inner bearing races you would simply push in the outer bearing while tightening the pulley nut. In the end the pulley would collide with the housing. Sorry, but someone in the past was completely unaware about what he was doing with your pump.

See also my last posts of this thread on page 4 for what you need for a rebuild.

https://www.ferrarichat.com/forum/threads/water-pump-rebuild.362611/page-4

Three bearings draft with inner race spacers:

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or like this. But then i would rather look, whether there's a two-row bearing in the needed ID and OD and adjust the spacer's length accordingly:

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Best from Germany
Martin