Oil Ring Installation

Assemble the spacer of the oil ring into the piston ring groove. Then, assemble the upper side rail, and after this assemble the lower side rail.
NOTE: Install the side rail and end gap of the spacer so that they are at the position as shown in the illustration.

Fig 1: Identifying Position Of Side Rail And End Gap Of Spacer
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION: The side rail may be broken if its end gap is widened by a ring expander as in other piston rings.
When assembling the side rail, push it by fingers, after fitting one end of the side rail into the piston groove, for easy assembly.
After assembling the oil ring into the piston, make sure that the side rail turns smoothly to either direction.

Fig 2: Pushing Side Rail By Fingers Into Piston Groove For Easy Assembly
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.