Fitting Rings

Select proper ring set for size of cylinder bore. Position ring in cylinder bore in which it is going to be used.
Push ring down into bore to area where normal ring wear is not encountered. Use a piston to position ring so that it is square with cylinder wall.
Measure gap between ends of ring using feeler gauge. If ring gap is less than or greater than specified, a smaller or larger ring will have to be used.
Check side clearance of compression rings with feeler gauge, of specified thickness, inserted between ring and its lower land on piston. Feeler gauge should slide freely around entire circumference of piston without binding.
If feeler gauge binds because of high spots on lower land of piston, piston should be replaced.