Armed with the relevant back head info, I made a start drilling out all the valves and cutting up some copper wire.
The manifold casting is quite intricate and very nicely cast, except that the coach steam heat valve pipe entry is incorrectly placed. (Sorry for the appalling photography) The red arrow shows the pipe entry as cast, the blue arrow shows where it needs to be....
So I cut it off, drilled a 0.5 hole in to the rear of the valve and through the remaining support, pinned and soldered with 227 degree solder for strength in the correct position. Some one will undoubtedly tell me the original position was ok, but from the majority of photos, I don't think it was the normal position.
Then I made a start soldering the different sized 'pipe work' in to place. Still a lot to do. I want to fit the washout plugs in the back head followed by the door lever, then spray the front and hopefully solder all the pieces on from the rear quickly without damaging the paint.
.....The clack valves are not soldered in yet.
I hope to complete the back head over the weekend
