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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 503 (Engine Mechanical (4.0L)) >> Removal And Installation >> Cylinder Head >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. When valve guide is removed, install it. Refer to Inspection After Disassembly .
  2. When valve seat is removed, install it. Refer to Inspection After Disassembly .
  3. Install valve oil seals using suitable tool.
    G04132288Courtesy of NISSAN NORTH AMERICA, INC.

    Height (H) (Without valve spring seat installed)

    Intake and exhaust

    : 14.3 - 14.9 mm (0.563 - 0.587 in)
  4. Install valve spring seat.
  5. Install valves in their original positions.
    NOTE: Larger diameter valves are for intake side.
  6. Install valve spring (uneven pitch type).
    G04073061Courtesy of NISSAN NORTH AMERICA, INC.
    • Install narrow pitch end (paint mark) to cylinder head side (valve spring seat side).
  7. Install valve spring retainer.
  8. Install valve collet.
    G04146417Courtesy of NISSAN NORTH AMERICA, INC.
    • Compress valve spring using suitable tool, attachment and adapter using Tool. Install valve collet with magnet hand.
      CAUTION: When working, take care not to damage valve lifter holes or valve stems.
    • Tap valve stem edge lightly with plastic hammer after installation to check its installed condition.
  9. Install valve lifter.
    • Install valve lifters in their original positions.
  10. Install spark plug tube.
    • Press-fit spark plug tube as follows:
    1. Remove old liquid gasket from the cylinder head mounting hole.
    2. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.

      Use Genuine High Strength Locking Sealant or equivalent. Refer to Recommended Chemical Products and Sealants .

    3. Press-fit spark plug tube so that its height (H) is as specified using suitable drift.
      G04073063Courtesy of NISSAN NORTH AMERICA, INC.

      Standard press-fit height "H"

      : 38.1 - 39.1 mm (1.500 - 1.539 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 face.
  11. Install spark plug. Refer to Removal and Installation .
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