Piston Pin Installation

When replacing a piston, check the cylinder bore size mark stamped on the illustrated position of the cylinder block and select a corresponding piston from the table below.

Cylinder bore size mark	Piston size mark
A	A
B	B or None
C	C

Fig 1: Identifying Cylinder Bore Size Mark

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: The piston size mark is indicated on the piston top face.

Insert the push rod into the piston pin and attach guide A.
Align the front mark of the piston with that of the connecting rod to assemble.
Apply engine oil to the circumference of the piston pin.
Insert the guide A side of the piston pin assembled in section 1 into the pin hole from the front mark side of the piston.

Fig 2: Identifying Piston Size Mark
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Screw guide B into guide A and open clearance between guide A and guide B by 3 mm (0.12 inch) (make the base in line with flushed surface) to assemble.
Set the piston on special tool piston setting base so that its front mark faces upward.
Use a press to press fit the piston pin. If the press fit load is below the standard value, replace the piston pin (piston assembly) or connecting rod, or both.
Standard value: 7, 500 - 17, 500 N (1, 686 - 3, 934 lbf)

Fig 3: Identifying Piston Guides Clearance
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.