Is there a way to rebuild the water pump on an 87’ 300D OM603? It has the metal impeller and it’s rusted because it sat with plain water in the system for a good while, before I got it.

I’m rebuilding the engine, I thought I read somewhere that the older water pumps can be rebuilt with a newer and better ‘plastic’ (for lack of proper word) instead of buying a new water pump.

I’m not trying to save money, if I can rebuild to original OEM water pump I’d prefer to do so rather than buy a replacement that isn’t OEM. From what I understand most of the replacement water pumps aren’t as good as the originals.

Cheers, Allen