Don,
If it is cast iron and not cast steel ,it will need to be
done in an oven for preheat ,welding,post heat and cooling. I
would volunteer to do it but ticker is not up to doing it .
There are several shops in the US that can do it, one is
Diesel cast welding in Minn ,they also have a shop on the west
coast. Also check with gary reed ,he is the patent and manufactor
of lock n stitch lacing plugs. He also has a division that does
large casting welding ,he used to run the welding division of
northwest motor welding in Anaheim ,califoria .
first and second photos are before and after welding , third is
the oven and heating torches. Cylinder was preheated to 1200 deg,
welded and postheated to 1500 and cooling took over 12 hours.
<p align="center">
found bore cracked all the way around</p>
<p align="center">
bore as welded with torch</p>
<p align="center">
oven with 2 propane burners to heat
casting to 1200 deg F to weld</p>
george