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Home >> GMC >> 1983 >> Forward Control 5.7 M, Automatic, 400/M40 >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine Oil Pump Removal - V8 >> Removal & Installation >> 7.4L Oil Pump >> Oil Pump Removal & Disassembly

Oil Pump Removal & Disassembly

  1. Drain oil and remove oil pan. Remove pump-to-rear main cap bolt and remove pump and extension shaft. Remove pump cover attaching screws and pump cover.
  2. Remove pressure regulator from pump cover. Mark gears so they may be reassembled with same teeth indexing. Remove idler gear, drive gear, and shaft from pump body.
  3. Remove pressure regulator valve retaining pin, pressure regulator valve, washer, and spring. Examine pickup screen and pipe. If screen or pipe are damaged, pump must be replaced as assembly. Screen and pipe assembly are welded to pump body.
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