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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical (H4DO)) >> Cylinder Block >> Assembly >> Piston And Connecting Rod

Piston And Connecting Rod

WARNING: This page is about a different variant/trim than selected.
Fig 1: Exploded View Of Piston And Connecting Rod
G11264070Courtesy of SUBARU OF AMERICA, INC.
  1. Install the connecting rod bearing to the connecting rod and connecting rod cap.
  2. 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: Precaution For Installing Circlip On One End Of Piston Using Flat Tip Screwdriver
    G10262880Courtesy of SUBARU OF AMERICA, INC.
  3. 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: Aligning Front Mark Of Piston And Connecting Rod
    G11264072Courtesy of SUBARU OF AMERICA, INC.
  4. Apply engine oil to the piston pin, and attach the piston pin.
  5. 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: Precaution For Installing Circlip On Piston Using Flat Tip Screwdriver
    G10262882Courtesy of SUBARU OF AMERICA, INC.
  6. 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: Installing Piston Rings Onto Piston
      G11264074Courtesy 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.