As mentioned above Cavitation is a by-product of normal operation on a diesel engine, and if the DCA is not checked and maintained at each oil change, both the block & liners will look as though you have termites in your cooling system.
I was employed as a diesel mechanic for many years and have witnessed this damage first hand.
Since your damage seems minimal in that one small area of the sealing surface it should be relatively easy to repair with many products on the market. Be sure to use one that is relatively easy to re-create the sealing surface, and definitely get some dca test strips. Does you 706 have a water filter on the engine? If not, they are easy to rig up, and you could then install a new water filter with the DCA already added to the water filter.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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