Nissan 100NX N14 silhouetteN14

CYLINDER HEAD — Installation (Selecting cylinder head gasket — CD20)

EM-230prose procedure

CD engine. Cylinder head gasket selection procedure shown for CD20. Section tab marked 'CD'.

Continued from EM-229

Selecting cylinder head gasket — CD20

Selecting cylinder head gasket — CD20

  1. 1
    Step 1 — Measure projection of piston to cylinder head surface.
    a) Set dial gauge and needle on cylinder block and adjust dial gauge to zero.
    b) Set dial gauge needle at measuring point on piston, taking care not to disturb its zero setting.
    c) Rotate crankshaft around the top dead center position.
    d) Read and write down the maximum value.
    e) Reset dial gauge on cylinder block and confirm that zero setting has not been disturbed during measurement.
    f) Repeat steps b through d for all measuring points as illustrated and for each cylinder.
    Be sure that piston whose projection is being measured is at its TDC.
    Dial gauge assembly mounted on a stand resting on the cylinder block deck, with the needle positioned on a piston crown, for measuring piston projection to cylinder head surface.
    SEM593A
  2. 2
    Step 2 — Calculate the average value of measurements taken for each piston.
    Top view of a piston crown showing measuring points and dimensions. Two horizontal dimensions at top labeled 30 (1.18) and 30 (1.18); two vertical dimensions at right labeled 25 (0.98) and 25 (0.98), defining the measuring-point positions. Unit: mm (in).
    SEM529D
  3. 3
    Step 3 — Calculate the average value of measurements for all pistons from the values obtained from step 2.
  4. 4
    Step 4 — Round of the value obtained.
  5. 5
    Step 5 — Determine required thickness of gasket, referring to chart A.
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See also

chart A

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