If the piston rings are worn out you are probably looking at an engine rebuild. Without the proper tools and knowledge this would more than the average person could handle. Better off considering a new, reman or good used engine replacement.
combustion pressure will leak into the crankcase, and oil from the crankcase will leak into the cylinder.
This is usually a sign of excessive piston ring wear, however, there are other causes as well. You can get a more accurate diagnoses by performing a cylinder leak down test.
You have to disassemble the entire engine, remove the piston and check the rubber ring around that piston.
The DNJ ring spec. information, printed on each compression ring (located next to the piston ring gap), is installed facing the top of the piston for both the top (#1) and middle (#2) compression piston ring slots. The oil control ring can be installed just like any other oil control ring in the bottom (#3) piston ring slot.
a piston ring is not calibrated. You just slide the new one in place
The DNJ ring spec. information, printed on each compression ring (located next to the piston ring gap), is installed facing the top of the piston for both the top (#1) and middle (#2) compression piston ring slots. The oil control ring can be installed just like any other oil control ring in the bottom (#3) piston ring slot.
one ring per piston, the pistons have a groove in it where the ring fits on.
You mean a piston ring. It seals the gap between the piston and the chamber in your engine
The purpose of a piston ring expander is to make it easier remove and install piston rings. Because of the low torque they use, they help to prevent damage to the piston rings.
The lowest ring is the oil ring
With a piston ring compressor.
The "D" on a piston ring typically indicates the cylinder bore diameter for which the ring is intended. The "N" refers to the ring's position on the piston, such as top, middle, or oil control ring. Together, "D N" specifies the ring's size and location within the engine.