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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Engine Mechanical - QG18DE) >> Cylinder Head >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. If removed, install valve seat, refer to , "REPLACING VALVE SEAT FOR SERVICE PARTS ".
  2. If removed, install valve guide, refer to , "VALVE GUIDE REPLACEMENT ".
  3. Install valve oil seal using Tool as shown.
  4. Install valve spring seat.
  5. Install valve.
    • Install large diameter to intake side.
  6. Install valve spring.
  7. Install valve spring retainer.
    Fig 1: Installing Valve Oil Seal
    G00774049Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Install valve collect.
    • Compress valve spring using Tool as shown. Install valve collect with magnet.
    • Tap stem edge lightly with plastic hammer after installation to check if installed securely.
    Fig 2: Installing Valve Spring
    G00774050Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Install adjusting shim, if equipped in their original positions.
  10. Apply sealant to engine coolant temperature sensor threads.
  11. Install engine coolant temperature sensor.
  12. Install spark plug tube.
    • Press-fit spark tube as follows.
    1. Remove old liquid gasket adhering to cylinder-head mounting hole.
    2. Apply liquid gasket to area within approximately 15 mm (0.59 in) from edge of spark plug tube press-fit side as shown.
      Fig 3: Applying Liquid Gasket To Area Within Approximately 15 Mm From Edge Of Spark Plug Tube
      G00774051Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Using a drift, press-fit the spark plug tube so that its height "H" is as shown.
      1. Standard press-fit height "H" : 41.0 - 42.0 mm (1.61 - 1.65 in) 
    CAUTION:
    • When press-fitting, take care not to deform spark plug tube.
    • After press-fitting, wipe off liquid gasket protruding onto cylinder head upper surface.
  13. Install spark plugs. Refer to , "OUTER COMPONENT PARTS ".
  14. Install intake manifold. Refer to , "OUTER COMPONENT PARTS ".