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Injection Pump Timing

  1. All 6.2L engines are timed both statically and dynamically at assembly. The dynamic timing marks are half circles. Static timing marks are straight lines. Whenever possible use dynamic timing marks to adjust injection pump timing. If a replacement pump is to be used, adjust injection timing using static marks.
  2. Check alignment of injection pump timing marks on top of engine front cover and injection pump flange. If timing marks are not aligned, loosen 3 retaining nuts, and align marks on injection pump with marks on front cover. Tighten nuts to 30 ft. lbs. (41 N.m) and adjust throttle linkage.
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