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 - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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