especially true on the old y blocks.. pistons had LONG heavy skirts that added excessive mass and caused the piston to try to flip at the end of strokes.. so wrist pin ring timing was a must on those engines. Probably no so much true on the newer light mass, short skirt pistons used on gas engines today. The old yblocks ALWAYS had a "bell worn in the top and bottom of the cyl that required excessive boring to clean up.. and Locations of the bell was at the critical location of max compression or vacuum. These engines needed major work at 60,000 miles back in the day.
The bell meant that you had to measure ring gap in the bottom, middle and top of the cyl.. and often it would be beyond spec for rings to handle. Only soft cast iron rings would work if at that.
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Today's Featured Article - Restoring a John Deere 2010 Diesel Tractor - by Jim Nielsen. Following seven years working in California's Silicon Valley, my wife, baby son and I moved back to Australia to retire. We bought a small 'farm' of about 50 acres near Bendigo, in the state of Victoria. I soon found that it would be very useful to have a tractor around the place for things such as grading our long drive and brush-hogging the fields. I was also embarking on planting 1000 eucalyptus trees, and hence I would need a ripper, small disk plow, sprayer etc. to get these things accompli
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