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Installation Procedure 2

    Fig 1: View Of Crankshaft Balancer Alignment Mark & Engine Front Cover Alignment Tab
    GM334551Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Rotate the number 1 cylinder to TDC of the compression stroke. 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 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 Gear Pre-drilled Indent Hole & Rotor Segment
    GM301395Courtesy of GENERAL MOTORS CORP.
  2. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3).
    3. NOTE: The ignition system distributor driven gear and rotor may be installed in multiple positions. In order to avoid mistakes, mark the distributor on the following components in order to ensure the same mounting position upon reassembly:
    • The distributor driven gear
    • The distributor shaft
    • The rotor holes

    Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.
  3. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1) or V8 engine (2).
    • The alignment will not be exact.
    • If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite of the rotor segment when the gear is installed in the distributor.
    4. Fig 3: View Of Distributor
    GM34397Courtesy of GENERAL MOTORS CORP.
  4. Using a long screw driver, align the oil pump drive shaft to the drive tab of the distributor.
  5. Guide the distributor into the engine. Ensure that the spark plug towers are perpendicular to the centerline of the engine.
    6. Fig 4: View Of Rotor Segment Aligned With Pointer Cast In Distributor Base
    GM4350Courtesy of GENERAL MOTORS CORP.
  6. Once the distributor is fully seated, the rotor segment should be aligned with the pointer cast into the distributor base.
    • There may be a 6 cast into this pointer, indicating that the distributor is to be used on a 6 cylinder engine or an 8, indicating that the distributor is to be used on a 8 cylinder engine.
    • If the rotor segment does not come within a few degrees of the pointer, the gear mesh between the distributor and the camshaft may be off a tooth or more.
    • If this is the case, repeat the procedure again in order to achieve proper alignment.
    7. Fig 5: View Of Distributor Hold Down Bolt
    GM366609Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  7. Install the distributor mounting clamp bolt.

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

    8. Fig 6: View Of Distributor Cap
    GM301393Courtesy of GENERAL MOTORS CORP.
  8. Install the distributor cap.
  9. Install 2 new distributor cap screws.

    Tighten:  Tighten the screws to 2.4 N.m (21 lb in).

  10. Install the electrical connector to the distributor.
  11. Install the spark plug wires to the distributor cap.
    12. Fig 7: View Of Ignition Coil Wire Harness
    GM387772Courtesy of GENERAL MOTORS CORP.
  12. Install the ignition coil wire.

    Note the correct orientation of the wire boot.

    13. IMPORTANT: If the MIL is turned ON after installing the distributor, and a DTC P1345 is found, the distributor has been installed incorrectly.
  13. Repeat installation procedure 2 if the malfunction indicator lamp is turned ON after installing the distributor.
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