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Home >> GMC >> 1990 >> Forward Control 4.3 Z, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Diesel) >> Injection Pump >> Installation ("G" Series)
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Installation ("G" Series)

  1. Install new injection pump gasket. Align locating pin on injection pump hub with slot in injection pump driven gear while aligning injection pump timing marks. See Fig 1.
  2. Attach injection pump to front cover. Alignment marks made during removal must be aligned. Tighten nuts. Attach pump to drive gear and tighten bolts. Reverse removal procedure to complete installation. Check injection pump timing. See INJECTION PUMP TIMING in ADJUSTMENTS article.
Fig 1: Locating Diesel Injection Pump Components
G90B15728Courtesy of GENERAL MOTORS CORP.