>> C << Piston Ring Number 2/Piston Ring Number 1 Installation

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

To prevent wrong installation, check the identification mark of each piston ring. The identification mark is stamped near the ring gap:
Identification mark:
1. Number 1 ring: 1R
2. Number 2 ring: 2R
NOTE: Size marks on piston rings are as follows.

Fig 1: Identifying Identification Mark On Piston Ring
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Piston Rings Size Marks Reference Table
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Using the piston ring expander, fit number 2 into the number 2 groove of piston.
NOTE: Install piston rings with identification mark facing up, to the piston crown side.

Fig 3: Fitting Number 2 Piston Ring Into Number 2 Groove Of Piston
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Install the number 1 piston ring in the same manner as step 2.