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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Distributor Installation

Distributor Installation

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

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.
    Fig 1: Aligning Crankshaft Balancer Alignment Marks With Engine Front Cover Tabs
    G02078294Courtesy of GENERAL MOTORS CORP.
  2. Remove the distributor cap bolts and discard.
  3. Remove the distributor cap.
    Fig 2: Removing Bolts & Distributor Cap
    G02078295Courtesy of GENERAL MOTORS CORP.
  4. Install a NEW distributor gasket onto the distributor.
    Fig 3: Installing Distributor Gasket
    G02078296Courtesy 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.
    Fig 4: Aligning Driven Gear Indent Hole With Distributor Housing Paint Mark
    G02078297Courtesy 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.
    Fig 5: Aligning Distributor Housing Flat Toward Front Of Engine
    G02078298Courtesy 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.

    Fig 6: Installing Distributor & Distributor Clamp
    G02078299Courtesy 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.

    Fig 7: Aligning Distributor Rotor Segment With Number 6 Pointer
    G02078300Courtesy of GENERAL MOTORS CORP.
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  11. Install the distributor clamp bolt.

    Tighten 

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

    Fig 8: Installing Distributor Clamp Bolt
    G02078301Courtesy 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).

    Fig 9: Installing Distributor Cap & Bolts
    G02078302Courtesy of GENERAL MOTORS CORP.
  13. Install the ignition coil wire harness.
    Fig 10: Installing Ignition Coil Wire Harness
    G02078303Courtesy of GENERAL MOTORS CORP.