Proper cross hatch in a cylinder, both depth of cut and geometry have a lot to do with ring seal. Chrome faced rings are hard and take some doing to seat, this is where proper bore preparation as far as hone comes into play.
The proper way to measure a bore is with a bore gauge. 90* apart, 3 points down the axis of the bore (top, middle, bottom) for a total of 6 measurements, if you are an overachiever measure 3 points at each height for a total of 9 measurements. It is also important to mic the piston on the skirt to make sure it is not worn. Pistons are not true cylinders but are larger on the skirt.
Proper indexing of compression and oil rings on the piston are of utmost importance.
Oil vapor is almost certainly leakage by the rings.
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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