Nothing was beefed up. The last 6.2 made shared the same block as the 6.5, so it was considered one of the best 6.2s. Used a new one-piece rear main seal and new crankshaft. The block did not get beefed up at all. Later bigger bore 6.5s had thinner cylinder walls, not thicker.
What did happen is finally with some of the last 6.5s made, the outside main bearing bolts were made smaller. Taken down from 12 mm to 10 mm to leave more metal in the clamping area of the main cap. That was a problem area that caused many blocks to crack and crankshafts to break.
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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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