We just went through this with our 706 with a D282. Had an IH mechanic that is normally known for doing good work replace the gasket the first time at his home shop - the head gasket blew when we were driving it off the trailer when we brought it home. We put a second head gasket in after having the head milled - it lasted about a month then blew on a cold startup (no either). It turned out we had fuel injectors that were leaking horribly (partial hydrolock(?)). My son suspected two of them and it turned out 5 of the 6 were bad with very low (or no) pressure to get them to pop. Had them lapped at a fuel injector shop in Salina KS and we reinstalled them after head was milled again. The tractor was running just fine with the leaky injectors with no stumbling or excessive smoke. It does appear to be running better now. It had about 400 hours put on it this summer without an issue.
Probably the best move we made (besides having the injectors checked) was using NEW head bolts - they are expensive but you can get CAT head bolts a lot cheaper than the IH head bolts (it appears the IH are made in China anyway).
I would drop the oil pan first to see were the coolant is coming from. The first time ours blew it was leaking coolant externally, the second time it was blowing compressed air out the side of the engine, the third time it was leaking a small amount of coolant internally.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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