Nissan 100NX N14 silhouetteN14

Cylinder Head - Inspection (Cont'd) / Assembly

EM-177prose procedure
Continued from EM-176

Inspection (Cont'd)

Rocker Shaft and Rocker Arm

  1. 1
    Check rocker shaft and rocker arms for scratches, seizure and wear.
    Hand using a micrometer to check the outer diameter of the rocker shaft.
    SEM365B
  2. 2
    Check outer diameter of rocker shaft.
  3. 3
    Check inner diameter of rocker arm.
    Hand using a bore gauge to check the inner diameter of a rocker arm.
    SEM103B
Rocker shaft outer diameter
19.979 - 20.000mm (0.7866 - 0.7874 in)
Rocker arm inner diameter
20.007 - 20.028mm (0.7877 - 0.7885 in)
Rocker arm to shaft clearance
0.007 - 0.049mm (0.0003 - 0.0019 in)

Assembly

  1. 1
    Install valve component parts.
    Always use new valve oil seal. (Refer to OIL SEAL REPLACEMENT.)
    Before installing valve oil seal, install valve spring seat.
    Install uneven pitch type spring with its narrow pitch side toward cylinder head side.
    After installing valve component parts, use plastic hammer to lightly tap valve stem tip to assure a proper fit.
    Valve spring showing wide pitch (top) and narrow pitch (bottom) coils, with the cylinder head side labeled at the bottom (narrow pitch toward cylinder head).
    SEM052
  2. 2
    Install camshaft and upper front cover in cylinder head with new camshaft oil seal.
    Refer to OIL SEAL REPLACEMENT.
    After installing camshaft, set knock pin upper side.
    End view of camshaft showing the mark and knock pin orientation, with the knock pin set to the upper side.
    SEM564
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See also

OIL SEAL REPLACEMENT

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