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Home >> GMC >> 2004 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 4.3L >> Repair Instructions >> Off-Vehicle Repair instructions >> Distributor Installation
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Distributor Installation

    Fig 1: View Of Crankshaft Balancer Alignment Mark & Engine Front Cover Alignment Tab
    GM334551Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The engine front cover has 2 alignment tabs and the crankshaft balancer has 2 alignment marks (spaced 90 degrees apart) which are used for positioning number 1 piston at top dead center (TDC). With the piston on the compression stroke and at top dead center, the crankshaft balancer alignment mark (1) must align with the engine front cover tab (2) and the crankshaft balancer alignment mark (4) must align with the engine front cover tab (3).
  1. Rotate the crankshaft balancer clockwise until the alignment marks on the crankshaft balancer are aligned with the tabs on the engine front cover and the number 1 piston is at top dead center of the compression stroke.
    2. Fig 2: View Of Distributor Cap
    GM301393Courtesy of GENERAL MOTORS CORP.
  2. Remove the distributor cap bolts and discard.
  3. Remove the distributor cap.
    4. Fig 3: View Of Distributor Gasket
    GM523516Courtesy of GENERAL MOTORS CORP.
  4. Install a NEW distributor gasket onto the distributor.
    5. Fig 4: Aligning Indent Hole
    GM492137Courtesy of GENERAL MOTORS CORP.
  5. Align the indent hole on the driven gear with the paint mark on the distributor housing.
  6. Ensure that the distributor rotor segment points to the cap hold area.
    7. Fig 5: Aligning Slotted Tang In Oil Pump Driveshaft
    GM523746Courtesy of GENERAL MOTORS CORP.
  7. Align the slotted tang in the oil pump driveshaft with the distributor driveshaft.

    Rotate the oil pump driveshaft with a screwdriver if necessary.

  8. Align the flat (1) in the distributor housing toward the front of the engine.
    9. Fig 6: View Of Distributor & Distributor Clamp
    GM310298Courtesy of GENERAL MOTORS CORP.
  9. Install the distributor and distributor clamp.

    The flat in the distributor housing must point toward the front of the engine.

    10. Fig 7: Aligning Distributor Rotor Segment
    GM334555Courtesy of GENERAL MOTORS CORP.
  10. Once the distributor is fully seated, align the distributor rotor segment with the number 6 pointer (1) that is cast into the distributor base.

    If the distributor rotor segment does not come within a few degrees of the number 6 pointer (1), the gear mesh between the distributor and camshaft may be off a tooth or more. Repeat the procedure again in order to achieve proper alignment.

    11. Fig 8: View Of Distributor Clamp Bolt
    GM34403Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  11. Install the distributor clamp bolt.

    Tighten:  Tighten the distributor clamp bolt to 25 N.m (18 lb ft).

    12. Fig 9: View Of Distributor Cap
    GM301393Courtesy of GENERAL MOTORS CORP.
  12. Install the distributor cap and NEW distributor cap bolts.

    Tighten:  Tighten the distributor cap bolts to 2.4 N.m (21 lb in).

    13. Fig 10: View Of Ignition Coil Wire Harness
    GM387772Courtesy of GENERAL MOTORS CORP.
  13. Install the ignition coil wire harness.
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