Too much oil past worn oil rings will "torch" cut the exhaust valves too. I had a MF 85 gas that I burned an exhaust valve while trying the tractor out on the PTO dyno. Ran fine under light load, but when under full load it started hissing at the exhaust. When engine was apart the oil rings were shot. Same thing happened to a neighbors IH 560, it had a miss on two cylinders that a tune up would not correct. Compression check, and just listening to the exhaust confirmed exhaust leaks. Pulled the head, replaced all exhaust seats and valves and touched up the intakes. I noticed more oil than normal on the two cylinders that had the burned valves, and wanted to replace all sleeves and pistons while the head was off. Owner said no, oil use is not that bad. Put the repaired head on, and in less than ten hours the SAME two exhaust valves were torched again..
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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