Piston And Connecting Rod

Fig 1: Exploded View Of Piston And Connecting Rod

Courtesy of SUBARU OF AMERICA, INC.

Install the connecting rod bearing to the connecting rod and connecting rod cap.
Install the circlip on one end of the piston using a flat tip screwdriver.
NOTE:
- Be careful not damage the piston, by wrapping the tip of flat tip screwdriver with tape.
- Make sure the circlip is firmly inserted into the circlip groove.
- After installing the circlip, rotate the circlip so that its end part (a) and the cutout portion of circlip groove (b) do not match.
  
  Fig 2: Caution For Installing Piston End Circlip
  Courtesy of SUBARU OF AMERICA, INC.
Set the piston to the connecting rod.
NOTE: Align the front mark of piston and the connecting rod direction correctly as shown in the figure.

Fig 3: Identifying Piston Front Mark
Courtesy of SUBARU OF AMERICA, INC.
Apply engine oil to the piston pin, and attach the piston pin.
Install the circlip on the piston using a flat tip screwdriver.
NOTE:
- Be careful not damage the piston and piston pin, by wrapping the tip of flat tip screwdriver with tape.
- Make sure the circlip is firmly inserted into the circlip groove.
- After installing the circlip, rotate the circlip so that its end part (a) and the cutout portion of circlip groove (b) do not match.
  
  Fig 4: Caution For Installing Piston End Circlip
  Courtesy of SUBARU OF AMERICA, INC.
Install the piston rings onto the piston.
1. Install the oil rings in the order of expander, lower rail and upper rail by hand.
  NOTE: Oil ring consists of the upper rail, expander and lower rail.
  
  Fig 5: Identifying Expander, Upper And Lower Rails
  Courtesy of SUBARU OF AMERICA, INC.
2. Install the compression rings in the order of second ring and top ring, using piston ring expander.
  NOTE: Install so that the compression ring mark faces the top side of the piston.