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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 615 (Engine Mechanical) >> Removal And Installation >> Cylinder Head >> Disassembly and Assembly >> Disassembly

Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove spark plug. Refer to Exploded View .
  2. Remove valve lifter.
    • Identify installation positions and store them without mixing them up.
  3. Remove valve collet.
    GNSAWBIA1760Z-760Courtesy of NISSAN NORTH AMERICA, INC.
    • Compress valve spring using suitable tool (A) and remove valve collet with magnet hand.
    CAUTION: Do not damage valve lifter bore.
  4. Remove valve spring retainer, valve spring and valve spring seat.
  5. Push valve stem to combustion chamber side and remove valve.
    • Identify installation positions, and store them without mixing them up.
  6. Remove valve oil seals using suitable tool (A).
    G08686158Courtesy of NISSAN NORTH AMERICA, INC.
  7. Remove valve seat (if necessary). Refer to Inspection After Disassembly 
  8. Remove valve guide (if necessary). Refer to Inspection After Disassembly .
  9. Remove spark plug tube (if necessary).
    • Using pair of pliers, pull spark plug tube out of cylinder head.
    CAUTION:
    • Take care not to damage cylinder head.
    • Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless absolutely necessary.
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