LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Engine Mechanical - QG18DE) >> Cylinder Head >> Disassembly and Assembly >> Disassembly

Disassembly and Assembly: Disassembly

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. Remove intake manifold assembly. Refer to REMOVAL AND INSTALLATION  - INTAKE MANIFOLD.
  2. Remove adjusting shims (if equipped) and valve lifters.
    • Note locations for installation.
  3. Remove valve collect.
    Fig 1: Removing Valve Spring Retainer And Valve Spring
    G00774047Courtesy of NISSAN MOTOR CO., U.S.A.
    • Compress valve spring using Tool as shown. Remove valve collect with magnet.
  4. Remove valve spring retainer and valve spring.
  5. Push valve stem through the combustion chamber side, and remove valve.
    • Inspect valve guide clearance before removal. Refer to , "VALVE GUIDE CLEARANCE ".
    • Label components for installation in the same location.
  6. Remove valve oil seal using Tool as shown.
    Fig 2: Removing Valve Oil Seal
    G00774048Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove valve spring seat.
  8. When valve seat must replaced, refer to , "REPLACING VALVE SEAT FOR SERVICE PARTS ".
  9. When valve guide must be replaced, refer to , "VALVE GUIDE REPLACEMENT ".
  10. Remove spark plugs.
  11. Remove engine coolant temperature sensor.
    CAUTION: Do not shock it.
  12. Remove spark plug tubes, as necessary.
    • Using a pair of pliers, pull spark plug tube out of cylinder head.
    CAUTION:
    • Take care not to damage cylinder head.
    • Spark plug tubes are deformed during removal and cannot be reused once removed. Do not remove unless necessary.
scientia non olet · About LEMON Manuals