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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 7.4L V8 - VIN [N] >> Removal & Installation >> Cam Lobe Lift

Cam Lobe Lift

  1. Remove valve cover and rocker arm assembly. Using Lobe Lift Indicator (J-8520), mount dial indicator on cylinder head. Position dial indicator and ball socket adapter on push rod.
  2. Slowly rotate engine in direction of rotation until lifter is on base circle of camshaft. This is lowest reading. Adjust dial indicator to zero. Rotate engine until push rod is fully raised and note reading.
  3. Compare reading with specification. See CAMSHAFT SPECIFICATIONS table. Replace camshaft and lifters if not within specification.
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