Service Manual — page 51 of 715

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PERIODIC MAINTENANCE 2-29
Periodic Maintenance Procedures
Engine Top End
Valve Clearance Inspection
                            NOTE
  ○Valve clearance must be checked and adjusted when
    the engine is cold (at room temperature).

• Remove:
   Cylinder Head Cover (see Cylinder Head Cover Re-
   moval in the Engine Top End chapter)
   Crankshaft Sensor Cover (see Crankshaft Sensor Re-
   moval in the Electrical System chapter)

• Using  a wrench on the timing rotor bolt [A], turn the crank-
  shaft clockwise until the line [B] (TDC mark for #1,4 pis-
  tons) on the timing rotor is aligned with the mating surface
  [C] of the crankcase.

• Using a thickness gauge [A], measure the valve clearance
  between the cam and the valve lifter.
  Valve Clearance
    Standard:
      Exhaust 0.22 ∼ 0.31 mm (0.0087 ∼ 0.0122 in.)
      Intake     0.15 ∼ 0.24 mm (0.0059 ∼ 0.0094 in.)

                            NOTE
  ○Thickness gauge is horizontally inserted on the valve
   lifter.
   Appropriateness [A]
   Inadequacy [B]
   Thickness Gauge [C]
   Horizontally Inserts [D]
   Cam [E]
   Valve Lifter [F]
   Hits the Valve Lifter Ahead [G]