Nissan 100NX N14 silhouetteN14

CYLINDER HEAD

EM-41prose procedure
Continued from EM-40

Inspection (Cont'd)

CAMSHAFT JOURNAL CLEARANCE (continued)

  1. 3
    Measure outer diameter of camshaft journal. Standard outer diameter: No. 1 journal 27.935 - 27.955 mm (1.0998 - 1.1006 in); No. 2 to No. 5 journals 23.935 - 23.955 mm (0.9423 - 0.9431 in).
    Illustration of measuring the outer diameter of a camshaft journal using a micrometer.
    SEM156D
  2. 4
    If clearance exceeds the limit, replace camshaft and/or cylinder head. Camshaft journal clearance: Standard 0.045 - 0.086 mm (0.0018 - 0.0034 in); Limit 0.15 mm (0.0059 in).
Camshaft journal outer diameter - No. 1 journal1.0998 - 1.1006 in
27.935 - 27.955mm
Camshaft journal outer diameter - No. 2 to No. 5 journals0.9423 - 0.9431 in
23.935 - 23.955mm
Camshaft journal clearance - Standard0.0018 - 0.0034 in
0.045 - 0.086mm
Camshaft journal clearance - Limit0.0059 in
0.15mm

CAMSHAFT END PLAY

  1. 1
    Install camshaft in cylinder head.
  2. 2
    Measure camshaft end play. Camshaft end play: Standard 0.070 - 0.143 mm (0.0028 - 0.0056 in); Limit 0.20 mm (0.0079 in).
    Illustration of measuring camshaft end play with a dial gauge against the end of the camshaft installed in the cylinder head; arrows indicate the axial movement direction.
    SEM157D
Camshaft end play - Standard0.0028 - 0.0056 in
0.070 - 0.143mm
Camshaft end play - Limit0.0079 in
0.20mm

CAMSHAFT SPROCKET RUNOUT

  1. 1
    Install sprocket on camshaft.
  2. 2
    Measure camshaft sprocket runout. Runout (Total indicator reading): Limit 0.15 mm (0.0059 in).
    Illustration of measuring camshaft sprocket runout with a dial gauge against the sprocket installed on the camshaft; arrows indicate rotation.
    SEM158D
  3. 3
    If it exceeds the limit, replace camshaft sprocket.
Camshaft sprocket runout (Total indicator reading) - Limit0.0059 in
0.15mm

VALVE GUIDE CLEARANCE

  1. 1
    Measure valve deflection in a parallel direction with rocker arm. (Valve and valve guide mostly wear in this direction.) Valve deflection limit (Dial gauge reading): Intake & Exhaust 0.2 mm (0.008 in).
    Illustration of measuring valve deflection in a parallel direction with a dial gauge against the valve; a dimension of approximately 25 mm (0.98 in) is indicated for the measuring point.
    SEM345D
Valve deflection limit (Dial gauge reading) - Intake & Exhaust0.008 in
0.2mm
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