As I mentioned over in my thread about the bad ignitor, H8PVMNT was kind enough to procure me a good one. As part of the trade, I built him a tool to install valve guides in a 22R head. I thought the method of building it might interest those here who have their own metalworking tools, so I took pics along the way for a post about it.
These are the starting materials: a 4" long piece of 5/8" steel rod and a 5/16" copper washer.
We put a smooth face on the ends of the rod.
Down to business. I turned the last 2" of the rod down to .309" to slip inside a valve guide (shooting for .313" but overshot). Here is the first pass of many:
Half a mile of chips later...
Beating up new valve guides with steel is not a good idea. Hence the copper washer.
The washer is soldered on:
Back to the lathe for some cleanup. The face of the washer is cut square and true to the part that goes in the valve guide:
And the outside is turned down close to 5/8":
I then turned the tool around in the chuck to work on the other end. First, I took a skim cut on the 5/8" rod for a good finish and to be flush with the washer:
We want a dimple in the end so it can be driven with an air hammer. Start with a pilot hole...
And finish up with the radius tool.
I added some chamfers to avoid cut fingers:
I can't knurl, so I cut 5 shallow grooves to afford the operator some kind of a grip.
And there it is.
Here's to seeing it in action soon!