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Home >> Isuzu >> 1983 >> Impulse Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL - VIN [B],1.9L [A], 1.95L 4-CYL - VIN [A] >> Engine Identification >> Rocker Arm Shaft Assembly >> Inspection

Rocker Arm Shaft Assembly: Inspection

  1. Place rocker arm shafts on "V" blocks and check runout at center of shaft. A slight amount of runout can be corrected with a press. DO NOT  apply heat.
  2. Maximum runout should not exceed .008" (.20 mm). Replace rocker arm shaft if runout is greater than .016" (.40 mm).
  3. Measure rocker arm shaft at 4 rocker arm locations. Standard diameter is .807" (20.50 mm). Replace rocker arm shaft if less than .801" (20.35 mm).
  4. Measure inside diameter of rocker arms. If clearance is greater than .008" (.20 mm) replace either rocker arms or shaft. Replace rocker arms if valve stem contact area is scored or worn.
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