I called local IH dealer today and they said they dont use special tool. I called local another IH dealer ane got the same story.
Right, a special tool isn't needed, but a little "mechanical appitude" is
. First, after you've got the old plug out, take some sandpaper or whatever and clean all the scale and crud from around the hole. Take a small screwdriver and clean ALL the scale from the lip area where the plug actually seals and makes contact. Get a can of what's called Aviation Permatex, the brown stuff. Put some on the edges of the plug and on the sealing surface of the hole. After you set the plug in the hole, you take the proper size ball peen hammer (big plug, bigger ball end on the hammer) and center the ball of the hammer at the center of the plug. Then, with another heavy hammer, smack the face of the ball peen hammer not too hard, but not too soft, and presto, you've dimpled the plug and expanded it tightly in it's bore forever more.
if you dont use it--ask him what happened to his soft plug--in spite of others peoples comments---
It's not rocket science, key thing is you have to know what you're doing, and do it right, like cdnsarguy just said, if you don't feel confident doing it, maybe you can get it to a shop somehow.
Another option is if your town is fairly large, you probably have a mobil diesel mechanic (does work on the road, etc.) and he'd probably charge an hour's labor at most if you had everything ready for him and had him come out.