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Piston Rings: Replacement

  1. Using a ring expander, remove the old piston rings.
  2. Clean all ring grooves thoroughly.
    NOTE:
    • Use a squared-off broken ring or ring groove cleaner with a blade to fit the piston grooves.
    • Top ring groove is 1.0 mm (0.039 in) wide.
    • Second ring groove is 1.2 mm (0.047 in) wide.
    • Oil ring groove is 2.8 mm (0.11 in) wide.
    • File down the blade if necessary.
    CAUTION: Do not use a wire brush to clean ring lands, or cut ring lands deeper with cleaning tool.
    NOTE: If the piston is to be separated from the connecting rod, do not install new rings yet.
  3. Install new rings in the proper sequence and position (see RING-TO-GROOVE CLEARANCE  , CRANKSHAFT OIL SEAL  ).
    NOTE: Do not reuse old piston rings.
    Fig 1: Identifying Piston Ring Proper Installation Sequence
    G06289381Courtesy of AMERICAN HONDA MOTOR CO., INC.
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