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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 >> Camshaft >> CAMSHAFT : Removal & Installation >> PR25DD engine >> Removal

PR25DD engine: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Remove the timing chain. Refer to Removal and Installation .
  2. Disconnect the harness connectors from the intake camshaft position sensor, exhaust camshaft position sensor, engine coolant temperature sensor, EVAP canister purge volume control solenoid valve, high pressure fuel pump and air fuel ratio (A/F) sensor 1.
  3. Remove camshaft position sensors.
    CAUTION: Do not reuse O-rings.
  4. Release harness retainers and reposition harness.
  5. Remove the high pressure fuel pump insulator. Refer to Exploded View .
  6. Disconnect the quick connector (A) using the following procedure:
    GNSALBIA0518Z-518Courtesy of NISSAN NORTH AMERICA, INC.
    1. Disconnect the hose clamp bracket (1) from the fuel feed hose (2).
    2. Disengage (A) and pull up (B) the pawl of the fuel feed hose and fuel hose connector retainer (C) to disconnect the fuel feed hose and fuel hose from the fuel feed tube.
      GNSJPBIA4377Z-377Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE: If the fuel feed hose, fuel hose or fuel feed tube is stuck, hold the fuel pipe by hand and disconnect it by pushing and pulling.
      CAUTION:
      • Keep parts away from heat source. Especially, be careful when welding is performed around them.
      • Do not expose parts to battery electrolyte or other acids.
      • Do not bend or twist connection between quick connector and fuel feed hose or fuel hose during installation/removal.
      • Pull quick connector while holding at location (D).
      • Do not remove the retainer.
      • Prepare a tray and waste beforehand as fuel leaks out.
      • Do not pull with lateral force applied. O-ring inside quick connector may be dama deg.
      • To prevent damage to each joint and protect it from the entry of foreign matter, cover the joint with plastic bag (A) or an equivalent.
        GNSJPBIA4378Z-378Courtesy of NISSAN NORTH AMERICA, INC.
  7. Remove the high pressure fuel tube. Refer to Exploded View .
    CAUTION: Do not reuse high pressure fuel tube.
  8. Disconnect the harness connector from the high pressure fuel pump.
  9. Remove high pressure fuel pump bolts (A) and remove high pressure fuel pump (1).
    GNSALBIA0519Z-519Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • For preventing damage to the high pressure fuel pump and camshaft bracket, loosen the bolts (A) by alternating sides one turn at a time until the tension applied to the bolts (A) by the high pressure fuel pump disappears.
    • Do not reuse O-ring.
  10. Remove high pressure fuel pump lifter.
  11. Remove electric intake valve timing control actuator target from camshaft sprocket (INT).
    CAUTION: Do not reuse electric intake valve timing control actuator target.
  12. Remove the camshaft sprocket [INT (1)] and camshaft [EXH (2)] using the following procedure:
    CAUTION: Do not rotate the crankshaft or camshafts while the timing chain is removed. It can cause damage to the valves and pistons.
    GNSALBIA0234Z-234Courtesy of NISSAN NORTH AMERICA, INC.
    1. Secure hexagonal part (A) of the camshaft with a suitable tool and loosen the camshaft sprocket bolt.
    2. Remove the camshaft sprocket bolt and camshaft sprockets for both camshafts.
  13. Loosen camshaft bracket bolts in reverse of the sequence shown.
    Fig 1: Camshaft Bracket Bolts Tightening Sequence
    GNSALBIA0526Z-526Courtesy of NISSAN NORTH AMERICA, INC.
    NOTE: Camshaft bracket (No. 1) and camshaft position sensor bracket use liquid gasket and can be difficult to remove. Do not damage mating surface when removing.

    (A)

    : Exhaust side

    (B)

    : Intake side

    SYMBOL

    : Engine front
  14. Remove camshaft signal plate (INT) and camshaft signal plate (EXH) (if necessary).
  15. Remove the valve lifters.
    NOTE: Check installation positions, and set them aside in the order removed.
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