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Home >> Chevrolet >> 2005 >> Astro Van Cargo, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - (Introduction) Specifications & Repair Instructions >> Repair Instructions >> Distributor Overhaul >> Disassembly Procedure
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Disassembly Procedure

  1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
    2. Fig 1: View Of Gear Pre-drilled Indent Hole & Rotor Segment
    GM301395Courtesy of GENERAL MOTORS CORP.
    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.
  2. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (2).
  3. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1). If not, replace the distributor.
    4. Fig 2: View Of Distributor Cap Rotor
    GM301396Courtesy of GENERAL MOTORS CORP.
  4. Remove the 2 screws from the rotor.
  5. Remove the rotor.
    6. Fig 3: View Of Rotor Screw Holes & Locator Pin Holes
    GM156752Courtesy of GENERAL MOTORS CORP.
  6. Note the locating holes that the rotor was removed from:
    • The rotor screw holes (1)
    • The rotor locator pin holes (2)
    7. Fig 4: View Of Square-Cut Hole In Vane Wheel
    GM156754Courtesy of GENERAL MOTORS CORP.
  7. Line up the square-cut hole in the vane wheel with the CMP sensor.
    8. Fig 5: View Of CMP Sensor & Screws
    GM301398Courtesy of GENERAL MOTORS CORP.
  8. Remove the 2 screws that hold the camshaft position (CMP) sensor.
  9. Discard the screws.
    10. Fig 6: View Of CMP Sensor
    GM156755Courtesy of GENERAL MOTORS CORP.
  10. Remove the CMP sensor.
  11. Note the dimple located below the roll pin hole on one side of the gear. The dimple will be used to properly orient the gear onto the shaft during reassembly.
    12. Fig 7: Driving Out/In Roll Pin
    GM301198Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  12. Support the distributor drive gear in a V-block or similar fixture.
  13. Drive out the roll pin with a suitable punch.
    14. Fig 8: View Of Distributor Shaft Shim Washer
    GM301405Courtesy of GENERAL MOTORS CORP.
  14. Remove the driven gear from the distributor shaft.
  15. Remove the round washer.
  16. Remove the tang washer.
  17. Remove the shim washer (1).
    18. Fig 9: View Of Distributor Shaft Oil Seal
    GM301419Courtesy of GENERAL MOTORS CORP.
  18. Remove the old oil seal.
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