Nissan 100NX N14 silhouetteN14

Valve Clearance Adjustment (Cont'd)

EM-127prose procedure

SR (SR20DE/SR20DET) engine cylinder head.

Continued from EM-126

Shim installation

  1. 14
    Place new shims of the proper thickness (indicated below) in place of the shim and rocker arm guide that were removed in step 6 above. Make sure the valve head and shims are clean and free from foreign matter.
    Shim thickness: Intake 2.75 mm (0.1083 in)
    Shim thickness: Exhaust 2.65 mm (0.1043 in)
    Two valves with their shims shown. Intake valve shim labeled '2.75 (0.1083)' and exhaust valve shim labeled '2.65 (0.1043)'. Labeled 'Shim', 'Intake valve', 'Exhaust valve', 'Unit: mm (in)'.
    SEM857D
  2. 15
    Install rocker arms, oil tubes and camshafts.
  3. 16
    Install camshaft sprockets.
  4. 17
    Install distributor.
  5. 18
    Install chain tensioner.
  6. 19
    Rotate the crankshaft until the surface is set for the cylinder to be adjusted, as shown in figure.
    Cross-section showing the camshaft positioned above the rocker arm with the surface set for the cylinder to be adjusted. Labeled 'Up', 'Camshaft', 'Rocker arm'.
    SEM854D
  7. 20
    Using two feeler gauges (one placed on the other), insert horizontally between the shim-to-rocker arm guide to measure the valve clearance.
    Illustration of two feeler gauges (one placed on the other) inserted horizontally between the shim-to-rocker arm guide to measure valve clearance. Labeled 'Up', 'Camshaft', 'Rocker arm', 'Feeler gauges', 'Valve'.
    SEM858D

Valve clearance

Intake & Exhaust
Hot0.30 - 0.35 mm (0.012 - 0.014 in)
Cold* (reference data)0.21 - 0.26 mm (0.008 - 0.010 in)
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