Cylinder steam passage repair ?

[chris organParticipant @chrisorgan39405]

Schoolboy error, I drilled through the wall between the steam inlet passage and exhaust passage. This is on a Rob Roy gun metal cylinder. So there is a number 30 hole that should not be there in the 3/32" wall.

Before I put it in the scrap box and start again, is there a reasonable repair ?

[chris organParticipant @chrisorgan39405]

[Bob RodgersonParticipant @bobrodgerson97362]

I would have thought that if there is sufficient metal that it could be tapped and a threaded plug fitted or it could be silver soldered but not sure what it would do to the finish.

[chris organParticipant @chrisorgan39405]

Tap and plug should be feasible. I can machine off after plugging to get a reasonable finish, these surfaces don't bear on anything else.

[chris organParticipant @chrisorgan39405]

.. thanks BTW.

[chris organParticipant @chrisorgan39405]

Well I think that was the right idea and it seems to have made a good repair. I threaded the offending hole 4 BA, screwed in a suitably modified screw and soldered round. Tidied up a little in the vertical slide with an end mill and there is a solid plug in the hole now which I don't think should go anywhere. 30 minutes, better than reaching a whole new cylinder block.

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