Hi Dave,
It could be welded. Or you could drill & tap & put a screw in the hole.
For that matter, clean the spot thoroughly with acetone or lacquer
thinner & smear a dab of "JB Weld" on it. If this doesn't work then try
something else. There is a possibility that the pin hole opens into a
much larger cavity underneath. If so, the JB on top would be the better
bet since welding might lead to a much larger hole. Take your choice.
Dave Russell
TR6 Triumph wrote:
> Hello all,
> one interesting thing that
> has not been remedied: a pinhole in the block. Now after evaluation,
> this pinhole is neither a result of any cracks nor the result of any
> stresses but rather a manufacturing air bubble in the casting process.
> The hole, on the surface of the black, is very small: approx. 0.6 mm.
> It is located on top of the boss for the alternator mounting. It is
> visible and very accessible.
>
> Though my particular background as a mechanical engineer somewhat
> covered new-material manufacturing processes, my personal experience
> never encompassed welding cast materials such as our TR6 engine block.
> I would imagine that MIG welding would suffice to zap the point of the
> pinhole for just a second. Then I could grind the spot flat again (or
> not). Oil pressure is nothing compared to welded steel, which is to say
> the weld wouldnt need to penetrate the surface more than to ensure
> a solid spot of weld.
>
> I request any and all input, especially from those of you with a lot of
> TR6 engine-building experience. Thanks (again).
>
> Sincerely,
> Dave Herbert
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