If you can feel any ridge where the top ring stops in its upward travel the next step is to measure the taper. (difference between the least worn area at the bottom of the sleeve, and the deepest part of that groove at the top.) Measuring it requires telescopic bore gauges, or dial/digital cylinder bore tools. If the ridge is able to be felt, it will need to be reamed out of the top of the bore to get the pistons out. The rings will collapse as far as they can into the ring grooves, but they are often limited by carbon buildup under the ring in the groove that prevents them from compressing far enough. Things will break. New rings will hit the top under side of the ridge (if not removed) and make broken rings a reality. So, if a detectable ridge, and intent to do it once, buy a sleeve and piston kit and do it correctly At about 1000 for all and fluids, If no ridge, and it was not using excessive oil, just do the top end. By the way unless you mic the rod journals you will not know what size bearings to put in it. Jim
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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