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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical (Pr25DD) (2 Of 2)) >> Removal And Installation >> Valve Oil Seal >> VALVE OIL SEAL : Removal & Installation >> PR25DD engine >> Removal

PR25DD engine: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Remove camshafts. Refer to Removal and Installation .
  2. Remove valve lifters. Refer to Exploded View .
  3. Rotate crankshaft, and set piston whose valve oil seal is to be removed to TDC. This will prevent valve from dropping into cylinder.
    CAUTION: When rotating crankshaft, be careful to avoid scarring front cover with timing chain.
  4. Compress the valve spring with suitable tool (A), (B) and (C) and remove the valve collet with a suitable magnetic tool.
    GNSJPBIA0180Z-180Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Be careful not to damage valve lifter holes.
    • The center of the suitable tool (A) and valve spring retainer (1) must be aligned.
      GNSJPBIA6339Z-339Courtesy of NISSAN NORTH AMERICA, INC.
  5. Remove valve spring retainer and valve spring (with valve spring seat).
    CAUTION: Do not remove valve spring seat from valve spring.
  6. Remove valve oil seal using suitable tool (A).
    G08686158Courtesy of NISSAN NORTH AMERICA, INC.
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