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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 596 (Engine Mechanical - 3.5L (Unit Repair)) >> Repair Instructions >> Exhaust Manifold Removal - Right (w/o RPO NC1 or NF7)

Exhaust Manifold Removal - Right (w/o RPO NC1 or NF7)

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Important:  It is difficult to mount the engine on an engine stand with the exhaust manifold/crossover pipe in place. When the engine is out of the vehicle, properly support the engine on the floor or bench and remove the exhaust manifold before mounting the engine on an engine stand.

Important:  The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  1. Disconnect the EGR valve inlet pipe from the exhaust crossover pipe (3).
  2. Remove the EGR valve inlet pipe to water crossover bolt (2).
  3. Remove the EGR valve inlet pipe (1).
    Fig 1: Removing EGR Valve Inlet Pipe
    G01815016Courtesy of GENERAL MOTORS CORP.
  4. Remove the oxygen sensor (1) from the manifold.
  5. Inspect the oxygen sensor for excessive deposits or damage. Replace the oxygen sensor if necessary.
    Fig 2: Removing Oxygen Sensor
    G01815017Courtesy of GENERAL MOTORS CORP.
  6. Remove the right exhaust manifold bolts.

    Important:  DO NOT reuse the exhaust manifold gasket.

  7. Remove the right exhaust manifold and exhaust manifold gasket.
    Fig 3: Removing Right Exhaust Manifold & Gasket
    G01815018Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the engine wiring harness from the knock sensor.
  9. Remove the engine wiring harness from the wiring harness bracket (1).
    Fig 4: Disconnecting Engine Wiring Harness From Knock Sensor
    G01815019Courtesy of GENERAL MOTORS CORP.
  10. Remove the engine wiring harness from the lower crankcase.
    Fig 5: Removing Engine Wiring Harness From Lower Crankcase
    G01815020Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the engine wiring harness from the ECT sensor.
  12. Remove the engine wiring harness.
    Fig 6: Removing Engine Wiring Harness
    G01815021Courtesy of GENERAL MOTORS CORP.
  13. Remove the ECT sensor.
    Fig 7: Removing ECT Sensor
    G01815022Courtesy of GENERAL MOTORS CORP.
  14. Remove the oil pressure switch.
    Fig 8: Removing Oil Pressure Switch
    G01815023Courtesy of GENERAL MOTORS CORP.
  15. Remove the wiring harness bracket bolt.
  16. Remove the wiring harness bracket.
    Fig 9: Removing Wiring Harness Bracket
    G01815024Courtesy of GENERAL MOTORS CORP.
  17. Remove the knock sensor.
    Fig 10: Removing Knock Sensor
    G01815025Courtesy of GENERAL MOTORS CORP.
  18. Remove the right engine coolant heater bolt.
  19. Remove the right engine coolant heater.
    Fig 11: Removing Right Engine Coolant Heater
    G01815026Courtesy of GENERAL MOTORS CORP.