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Disassembly and Assembly: Assembly

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. Install valve guide (if removed). Refer to Inspection After Disassembly .
  2. Install valve seat (if removed). Refer to Inspection After Disassembly .
  3. Install valve oil seals using suitable tool (A).
    G08686159Courtesy 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.
    • Install it in the original position.
      NOTE: Larger diameter valves are for intake side.
  6. Install valve spring.
    • Install vale spring so that the identification color (A) is facing upward.
    • Install smaller pitch to cylinder head side (B).
    • Intake and exhaust valve springs are the same.
    GNSAWBIA2758Z-758Courtesy of NISSAN NORTH AMERICA, INC.
  7. Install valve spring retainer.
  8. Install valve collet.
    GNSAWBIA1760Z-760Courtesy of NISSAN NORTH AMERICA, INC.
    • Compress valve spring using suitable tool (A) attachment and adapter. Install valve collet with magnet hand.
      CAUTION: Do not damage valve lifter bore.
    • Tap valve stem edge lightly with plastic hammer after installation to check its installed condition.
  9. Install valve lifter.
    • Install it in the original position.
  10. Install spark plug tube (If removed).
    • Press-fit spark plug tube as follows:
    1. Remove old liquid gasket from cylinder head mount 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 in using suitable tool.
      G04073063Courtesy of NISSAN NORTH AMERICA, INC.

      Press-fit height (H)

      : 38.2 +0.9/- 0.5 mm (1.5 +0.035 / -0.020 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 Exploded View .
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