OK,
Well, the case was in terrible shape with the holes drilled oversize and allot of tool nicks. I carefully reamed the holes to cleanup with a tapered reamer then turned tapered pins to fit. These were then sweated into the case with Alumaloy and the case was shaped and preped for finishing. There is a pic of the 3 main castings masked up ready to go into the blaster. I did that job at work where we keep a blast cabinet ready with very fine glass bead, the finished engine pic gives evidence of the quality of the finish. Afterward, the case was machined and the transformation was complete. The muff fins were carefully straightened and the ragged edges turned off. It was then polished and sent to a friend in Oz for anodizing. The spinner nut is for an ED Racer, but came on this engine.

The crank was cleaned up and I had to take a light truing cut off the pin and fit a new rod. The original was shot. It also required a new rotor drive pin be made and fitted.

This is a ball bearing engine so the bearings were replaced. The rod was made new as was the NVA and prop washer. The rotor was wallowed and loose so the rear cover and mating face of the rotor were resurfaced and a new center pin made and the whole thing refitted, The drive hole in the rotor was was also bored and bushed because it was so sloppy. The 8 cheesehead screws were buggered, so I carefully hammered the heads back into shape by drilling a hole just the size of the thread major diameter in a block of steel and inserting the screws for support. After they were reshaped a light facing cut was taken to freshen them up and they were treated with cold gun bluing. The tommy bar was straightened and cleaned up and treated the same as the screws.

I have not run it yet, but I made a new contra-piston and oil hardened the piston and the compression is like new, so I have no doubts it'll run just fine.

I forgot, another great gun product I use allot in restorations is blue and rust remover. Its very mild but will clean up the discoloration of rust in most cases.

Builder Of all my own Models: BOM