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Cylinder Head: Removal

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain engine coolant.

    Be careful not to spill coolant on drive belts.

    Fig 1: Removing Drain Plug
    G02007605Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Release the fuel pressure.

    Refer to FUEL PRESSURE RELEASE [QG18DE (EXCEPT CALIF. CA MODEL)] or FUEL PRESSURE RELEASE [QG18DE (CALIF. CA MODEL)] .

  3. Remove the air duct to intake manifold collector.
  4. Remove the engine drive belts.
  5. Remove the front splash undercovers.
  6. Remove the front exhaust tube.
  7. Before removing the intake manifold collector from the engine, the following parts should be disconnected to remove the intake manifold collector:
    • EGR tube
    • Fuel injector connectors
    • Ground harness
    • Breather pipe

    Harness connectors for:

    • IACV-AAC valve
    • Throttle position sensor
    • Throttle position switch
    • EGR temperature sensor
    • Water hoses from collector
    • Heater hoses
    • PCV hose

    Vacuum hoses for:

    • EVAP canister
    • Power brake booster
    • Fuel pressure regulator

  8. Remove the intake manifold rear supports.
  9. Remove the exhaust manifold.
  10. Remove the ignition coils.
    Fig 2: Removing Ignition Coils
    G02007606Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove the spark plugs.
  12. Remove the rocker cover bolts in numerical order as shown in Fig 3.
    Fig 3: Removing Rocker Cover Bolts In Numerical Order
    G02007607Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Set No. 1 piston at TDC on its compression stroke.
    Fig 4: Identifying Timing Mark
    G02007608Courtesy of NISSAN MOTOR CO., U.S.A.
    • Rotate crankshaft until mating mark on camshaft sprocket is set at position indicated in Fig 5.
      Fig 5: Aligning Mating Marks
      G02007609Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove Camshaft Position sensor (PHASE).
    Fig 6: Removing Camshaft Position Sensor
    G02007610Courtesy of NISSAN MOTOR CO., U.S.A.
    • Do not allow any magnetic materials to contact the Camshaft Position sensor (PHASE). 
    • Be careful not to damage sensor. 
  15. Remove intake valve timing control solenoid.
  16. Remove cylinder head front cover.
  17. Remove timing chain guide from camshaft bracket.
    Fig 7: Removing Chain Tensioner, Guide & Stopper Pin
    G02007611Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Attach a suitable stopper pin to chain tensioner.
  19. Remove chain tensioner.
  20. Remove camshaft sprocket bolts.
    • Apply paint to timing chain and cam sprockets for alignment during installation. 
  21. Remove camshaft sprockets.
    Fig 8: Removing Camshaft Sprocket Bolts
    G02007612Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove camshaft brackets and camshafts.
    • Apply I.D. marks to brackets to ensure correct reassembly. 
    • Bolts should be loosened in two or three steps. 
      Fig 9: Loosening Bearing Cap Bolts
      G02007613Courtesy of NISSAN MOTOR CO., U.S.A.
  23. Remove cylinder head bolts.
    Fig 10: Removing Cylinder Head Bolts
    G02007614Courtesy of NISSAN MOTOR CO., U.S.A.
  24. Remove cylinder head with intake manifold.
    • Head warping or cracking could result from removing in incorrect order. 
    • Cylinder head bolts should be loosened in two or three steps. 
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