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Home >> GMC >> 1981 >> Magnavan Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engines - 5.0L & 5.7L V8 Engines >> Valves >> Hydraulic Valve Lifter Adjustment

Hydraulic Valve Lifter Adjustment

  1. Rotate engine until engine is at number 1 firing position. Back off rocker arm adjusting nuts on number 1 intake and exhaust rocker arms until play in push rod is detected. Now tighten rocker arm nuts until play in push rod is just eliminated then tighten adjusting nuts one full turn more. With engine at number 1 firing position, adjust intake valves 1, 2, 5 and 7 and exhaust valves 1, 3, 4 and 8.
  2. Rotate engine to number 6 firing position and follow same procedures for adjusting valves. With engine at number 6 firing position, adjust intake valves 3, 4, 6 and 8 and exhaust valves 2, 5, 6 and 7.
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