Nissan 100NX N14 silhouetteN14

Cylinder Head - Inspection (Valve Lifter, Combustion Chamber, Camshaft)

EM-223prose procedure

Valve lifter guide bore, clearance and camshaft end play differ between CD17 and CD20.

Continued from EM-222

CYLINDER HEAD — Inspection

Valve Lifter (continued)

  1. 2
    Check diameter of valve lifters. Outer diameter: 34.959 - 34.975 mm (1.3763 - 1.3770 in)
    Micrometer measuring the outer diameter of a valve lifter.
    SEM724B
  2. 3
    Check valve lifter guide bore. CD17 — Bore diameter 34.988 - 35.013 mm (1.3775 - 1.3785 in), Standard clearance 0.013 - 0.054 mm (0.0005 - 0.0021 in); CD20 — Bore diameter 34.998 - 35.018 mm (1.3779 - 1.3787 in), Standard clearance 0.023 - 0.059 mm (0.0009 - 0.0023 in)
    Bore gauge measuring the valve lifter guide bore in the cylinder head; leader labels 'Bore gauge'.
    SEM725B
Valve lifter outer diameter1.3763 - 1.3770 in
34.959 - 34.975mm
CD17 valve lifter guide bore diameter1.3775 - 1.3785 in
34.988 - 35.013mm
CD17 standard clearance0.0005 - 0.0021 in
0.013 - 0.054mm
CD20 valve lifter guide bore diameter1.3779 - 1.3787 in
34.998 - 35.018mm
CD20 standard clearance0.0009 - 0.0023 in
0.023 - 0.059mm

COMBUSTION CHAMBER REPLACEMENT

Combustion Chamber Replacement

  1. 1
    Remove glow plug connecting plate, glow plugs and injection nozzle.
  2. 2
    Heat cylinder head in oil to between 150 and 160°C (302 and 320°F).
  3. 3
    Remove combustion chamber so that cylinder head will not be damaged.
    Be careful not to scratch inside of nozzle hole.
    Tool removing a combustion chamber (swirl chamber) from the cylinder head; star marks indicate area to avoid scratching.
    SEM720B
  4. 4
    Install combustion chamber.
    a. Heat cylinder head 150 to 160°C (302 to 320°F) in oil.
    b. Align combustion chamber knock pin with cylinder head notch, and install it into cylinder head using a plastic-tip hammer.
    Combustion chamber installation detail showing the knock pin and the notch in the cylinder head for alignment.
    SEM721B

CAMSHAFT VISUAL CHECK

Check camshaft for scratches, seizure and wear.

Camshaft End Play

  1. 1
    Install camshaft in cylinder head.
  2. 2
    Tighten bracket bolts to the specified torque.
  3. 3
    Measure camshaft end play. Camshaft end play: Standard CD17 0.06 - 0.17 mm (0.0024 - 0.0067 in); CD20 0.115 - 0.188 mm (0.0045 - 0.0074 in)
    Dial gauge set against the camshaft to measure camshaft end play; double-headed arrow shows axial movement direction.
    SEM726B
Camshaft end play, Standard CD170.0024 - 0.0067 in
0.06 - 0.17mm
Camshaft end play, Standard CD200.0045 - 0.0074 in
0.115 - 0.188mm
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