Marshall big end oil pot.
 

Evening all

Time has come to do something with the big end oil pot on my S type roller, have a couple of ideas and one is a new one, so any body have a new one, good one, casting or pattern sat about ? I f so let me know here's a few pictures.

http://www.steamscenes.org.uk/tti/14/005_0156.jpg

http://www.steamscenes.org.uk/tti/14/005_0157.jpg

http://www.steamscenes.org.uk/tti/14/005_0158.jpg

Whats wrong with it?

Threads are shagged basically, one idea is to machine the threaded section off and re thread plus a new top with a square on it.

When mine got to that stage we drilled and tapped a 1/4 BSP hole into the cap and fitted a pipe plug, then silver soldered a cross piece to the plug so it could be undone with your fingers. Easy and the old cap needs never to come off again. (You can loctite it on so a little heat will get it off if you need to).

Is the problem the thread on the central tube ,if so why not make up a new pipe,one way is to get length of brass hex ,put it in the lathe and drill a hole down the centre, and thread the ends, using hex allows the tube to be tightened with a socket spanner , most of these tubes have lots of mole grip marks where owners have tried to screw them in. Just made one this week for a Garrett.

Just cut the threads a bit deeper on the body and make a new top to suit, that would be the simplest option and most of it would still be original :)

Yes one of many possibilities, once the canopies and the raining of burning hot shite has stopped its the next item on the list stopping the oil rain ....

I am preferring the re-cut thread option I do like Davids idea of gluing the lid on and fitting a bung ... but I know somebodies going to unscrew the lid at the wrong time ...

How about solder the lid on? Means its a better fit but still reversible and someone shouldn't be able to unscrew it?