Nissan 100NX N14 silhouetteN14

Engine Maintenance (CD)

MA-50prose procedure

CD20 diesel engine valve clearance procedure.

Manifold Nut Check

  1. 1
    Remove exhaust manifold cover.
    Line drawing of the cylinder head showing the intake manifold (labeled at top) and the exhaust manifold (labeled at lower right) mounting locations on the CD20 engine.
    SMA341C
  2. 2
    Tighten manifold bolts and nuts to the specified torque.
  3. 3
    Install exhaust manifold cover.

Valve Clearance Adjustment

Warm up engine to the normal operating temperature.

Valve Clearance Check

  1. 1
    Set No. 1 cylinder to T.D.C. on its compression stroke.
    Line drawing of the camshafts/valve train viewed from above with 'No. 1 cylinder' labeled at top, used to set No. 1 cylinder to T.D.C. for the valve clearance check.
    SMA393A
  2. 2
    Check valve clearances of cylinders No. 1, 2, 4 and 6.
    Schematic top view of the camshaft/valves with a 'Front' arrow pointing left. Shows valve order at No. 1 T.D.C. (top row: cylinders 1, 2, 4, 6 with EX IN / IN EX / EX IN pairs) and at No. 4 T.D.C. (bottom row: cylinders 3, 5, 7, 8 with EX IN / IN EX). Identifies which valves to check at each T.D.C. position.
    SMA406A
  3. 3
    Set No. 4 cylinder to T.D.C. on its compression stroke.
  4. 4
    Check valve clearances of cylinders No. 3, 5, 7 and 8.

Valve clearance (Hot)

Intake
Clearance — Unit: mm (in)0.20 - 0.30 (0.008 - 0.012)
Exhaust
Clearance — Unit: mm (in)0.40 - 0.50 (0.016 - 0.020)

Valve Clearance Adjustment

  1. 1
    Set the cylinder, whose valve clearance needs to be adjusted, to T.D.C.
    Line drawing showing special tool KV11102600 being set between the cams on the camshaft for valve clearance adjustment. An arrow indicates the tool.
    SMA480A
  2. 2
    Turn crankshaft an additional 90 degrees clockwise from T.D.C.
  3. 3
    Set Tool or equivalent between cams on camshaft.
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