Nissan 100NX N14 silhouetteN14

Valve Clearance Adjustment (Cont'd)

EM-125prose procedure

SR (SR20DE/SR20DET) engine cylinder head.

Continued from EM-124

Valve Clearance Adjustment (Cont'd)

  1. 3
    Set No. 1 piston at T.D.C. on the compression stroke by rotating crankshaft.
    Front view of the engine showing the crankshaft pulley with arrows indicating the mating mark used to set No. 1 piston at T.D.C. on the compression stroke.
    SEM983C

Valve Clearance Adjustment (Cont'd)

  1. 4
    Check only those camshaft clearances shown in the figure.
    Top view of the cylinder head with the camshafts installed, an arrow pointing 'Engine front', and bold arrows indicating which camshaft lobes/clearances are to be checked.
    SEM681D

Feeler gauge measurement

  1. 1
    Using *two feeler gauges (with one placed on the other), measure the camshaft-to-rocker arm clearance at two places (one on the shim side and one on the rocker arm guide side). Be sure to insert the gauges horizontally.
    *: To minimize the measuring error.
    One feeler gauge increases the measurement error because the gauge is too stiff to bend.
    More than two gauges increases the gauge error twice as much, resulting in a considerable measurement error.
    Illustration of two feeler gauges (one placed on the other) being inserted horizontally between the camshaft and rocker arm on the rocker arm guide side. Labeled 'Up', 'Camshaft', 'Rocker arm', 'Feeler gauges'.
    SEM855D
  2. 2
    Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement adjusting shim.
    Detail view showing the camshaft above the rocker arm with measuring areas at the shim side and rocker arm guide side, each marked '3 (0.12)'. Labeled 'Camshaft', 'Rocker arm', 'Measuring area (Rocker arm guide side)', 'Measuring area (Shim side)', 'Unit: mm (in)'.
    SEM856D
Camshaft clearance (Hot): Intake & ExhaustHot
0.20 - 0.23mm0.0079 - 0.0091in
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