Speedmaster sale. It started

pittsburghracer said

That’s a water hole by the one in the chamber so that would concern me. I would prob it with a small stiff wire or the tool shown. Then if it just a shallow divot (casting fault) I would probably grind it a little and weld and grind it flush. If it’s deep and I didn’t have a welder or know someone capable it would be on its way back.

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Have you ever worked with a product called “Alumaweld” Being such a small imperfection, if he could conclusively determine it was just a shallow divot I wonder if the area could be heated with a handheld MAP torch and use the Alumaweld product to fill? I’ve used that stuff and if the area for welding is heated correctly it does hold.
Or what about an aluminum rod (essentially a pin) driven in, cut off slightly above the chamber surface, then driven further (like staking, until it splays being compressed into the void, then ground level? Me? I’d have no fear or concern of it falling out with either method.
If I knew of a welder who was an ace at aluminum welding perhaps I’d go that route but this seems minor and if not into a coolant passage an easy fix