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Home >> Chevrolet >> 1981 >> Pickup C10, 5.7L Eng VIN Z >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Diesel Fuel Injection >> Adjustment >> Injection Timing

Injection Timing

Engine is properly timed when mark on injection pump is aligned with mark on adapter. See Figure. If marks are not aligned, adjustment is necessary. Engine must be off for adjustment.

  1. Loosen 3 pump retaining nuts with wrench (J-26987). Align mark on pump with mark on adapter and tighten nuts to 19 ft. lbs.
    NOTE: Use 3/4" wrench on boss at front of pump to turn pump while aligning marks.
  2. Adjust throttle rod and linkage.