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7.4L V8 - VIN [N]: Adjustments GMC Pickup C2500

Mechanical ~111 words

VALVE CLEARANCE ADJUSTMENT

Note. Although valve clearance adjustment is not usually required (engine uses hydraulic valve lifters), perform following procedures after servicing valve train.

  1. Rotate engine until No. 1 piston is on TDC of compression stroke. Go next step and adjust specified valves listed in «VALVE CLEARANCE ADJUSTMENT»(ref-50023-S13742783362001011600000) table.
  2. Loosen rocker arm adjusting nut until lash is present. Tighten adjusting nut until lash is removed (under this condition, push rod cannot be rotated with fingers). Tighten adjusting nut 3/4 turn.
  3. Rotate crankshaft 360 degrees to bring No. 6 piston to TDC of compression stroke. Adjust remaining valves. See «VALVE CLEARANCE ADJUSTMENT»(ref-50023-S13742783362001011600000) table.
Piston AT TDCIntakeExhaust
No. 1No. 1, 2, 5 & 7No. 1, 3, 4 & 8
No. 6No. 3, 4, 6 & 8No. 2, 5, 6 & 7

VALVE CLEARANCE ADJUSTMENT

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