Repair Brake Master Cylinder

[dazzer]

I'm trying to get hold of a good condition 2000 MK1 Master cylinder. (single circuit)

Mine works perfectly but the servo pipe which for the last 50+ years has just touched and the top of the metal reservoir body and a little bit of damp has got between it and a little bit of movement its now got a pin hole leak. Had wondered if anyone had soldered one of these and would the silicone fluid be a problem even if cleaned off.

Or would silicone sealant seal against a surface open to silicone brake fluid?... are they compatible?

Its not a safety issue as its near the top of the rather tall early cylinder and to stop it leaking I've filled to below the pin hole and tie wrapped a piece of tyre inner tube over the hole.

Incidentally silicone brake fluid doesn't attack paintwork, however it does turn the paintwork purple. I now have a lilac inner wing... nice.

[Davemate]

How about winding in a tiny self tapping screw into the pinhole then grind the shank from inside the reservoir or just leave it sticking out
Or grind both the sticking out bit and also the head
Or
Is it possible to sleeve it

[nang]

If you can easily take it off and give it a good clean up you could solder it with a hot iron. As you say there is no pressure on that part.
Tony.

[dazzer]

Thanks guys. They seem a bit thin on the ground st the moment. I think some fettling as suggested is the only fix.