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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Engine Controls - Adjustments - 5.9L Diesel) >> Adjustments >> Fuel Injection Pump Timing >> Adjusting Fuel Injection Pump Timing

Adjusting Fuel Injection Pump Timing

WARNING: This page is about a different car, the 1995 Dodge Pickup and 1995 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove oil fill tube and adapter elbow from front timing gear cover by rotating assembly counterclockwise (viewed from front of engine). While holding engine from rotating with engine barring tool, loosen fuel injection pump drive gear nut.
  2. Install pencil-type magnet in end of shaft on fuel injection pump. Perform STEP 1. See Fig 1 . Magnet is used to prevent fuel injection pump drive gear nut and washer from falling into front timing gear cover during removal.
    NOTE: If pencil-type magnet is not available, place shop towel below fuel injection pump drive gear nut and front timing gear cover to prevent nut from falling into engine.
  3. Remove fuel injection pump drive gear nut and washer from the shaft. DO NOT  allow nut or washer to fall in front timing gear cover.
  4. Install one thrust washer, one bearing and then one thrust washer from Thrust Washer & Bearing Kit (6862) on the shaft. Ensure thrust washers and bearing are installed in correct order. Thrust washer and bearing are used to prevent fuel injection pump drive gear from rotating on the shaft when tightening fuel injection pump drive gear nut.
  5. Install fuel injection pump drive gear nut on shaft, allowing clearance between thrust washers and bearing. DO NOT  tighten nut at this time. Ensure timing pin is disengaged. Rotate engine clockwise (viewed from front of engine) until correct plunger lift is obtained on dial indicator.
  6. Once correct plunger lift is obtained, use Puller (L-4407A) to pull fuel injection pump drive gear from tapered area on shaft of fuel injection pump. Perform STEP 2. See Fig 1 . Ensure plunge r lift reading on dial indicator is still correct after pulling fuel injection pump drive gear from the shaft.
    Fig 1: Removing & Installing Fuel Injection Pump Drive Gear Nut & Removing Fuel Pump Drive Gear
    G94J65408Courtesy of CHRYSLER CORP.
  7. Rotate engine 20-30 degrees counterclockwise (viewed from front of engine) and then rotate back clockwise to TDC. This removes backlash from the gear train.
  8. Loosen, but DO NOT  remove, bolts used for installing gear puller. Using puller, rotate fuel injection pump drive gear counterclockwise while pushing fuel injection pump drive gear on the shaft of fuel injection pump. This removes backlash between fuel injection pump drive gear and camshaft gear.
  9. Hand tighten fuel injection pump drive gear nut. Remove puller from fuel injection pump drive gear. Tighten fuel injection pump drive gear nut to 11 ft. lbs. (15 N.m) to seat fuel injection pump drive gear on the shaft.
  10. Install pencil-type magnet in end of shaft on fuel injection pump. Remove fuel injection pump drive gear nut, thrust washers and bearing. Install washer and fuel injection pump drive gear nut. Remove magnet.
  11. While holding engine from rotating with engine barring tool, tighten fuel injection pump drive gear nut to specification. See TORQUE SPECIFICATIONS  . Repeat steps 11) through 15) under CHECKING FUEL INJECTION PUMP TIMING to verify proper plunger lift is obtained. Readjust if necessary. If plunger lift is correct, proceed to FINAL REASSEMBLY.
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