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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1243 (Engine Mechanical - 3.1L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Battery.
  2. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
  3. Drain the engine oil. Refer to ENGINE OIL AND OIL FILTER REPLACEMENT  .
  4. Remove the air cleaner assembly.
  5. Remove the hood. Refer to HOOD REPLACEMENT in Body Front End.
  6. Remove the engine mount struts. Refer to ENGINE MOUNT STRUT REPLACEMENT  .
    Fig 1: Removing Engine
    G02081506Courtesy of GENERAL MOTORS CORP.
  7. Remove the drive belt. Refer to DRIVE BELT REPLACEMENT  .
  8. Disconnect the following electrical connectors:
    • Knock sensor
    • Camshaft position (CMP) sensor
    • Crankshaft position (CKP) sensor
    • Heated oxygen sensor (HO2S)
    • Manifold absolute pressure (MAP) sensor
    • Exhaust gas recirculation (EGR) valve
    • Evaporative emissions (EVAP) canister purge solenoid
    • Throttle position (T/P) sensor
    • Idle air control (IAC) valve
    • Ignition coil
    • Body wiring harness-to-engine harness
  9. Raise and support the vehicle. Refer to JACKING AND LIFTING in General Information.
  10. Remove the 3-way catalytic converter pipe from the right exhaust manifold. Refer to CATALYTIC CONVERTER REPLACEMENT (3.1L) in Engine Exhaust.
  11. Remove the engine wiring harness grounds from the transaxle.
  12. Remove the engine mount lower nuts.
  13. Remove the torque converter covers.
  14. Remove the starter motor. Refer to STARTER MOTOR in Starter.
  15. Remove the A/C compressor. DO NOT discharge the A/C system. Support the compressor. Refer to COMPRESSOR REPLACEMENT (3.1L)  in Heating, Ventilation, and Air Conditioning.
  16. Remove the torque converter bolts.
  17. Remove the transaxle brace. Refer to TRANSAXLE BRACE .
  18. Remove the lower transaxle-to-engine bolt (6) and the stud (1).
  19. Remove the radiator outlet hose from the engine. Refer to RADIATOR HOSE REPLACEMENT - OUTLET (3.1 L) in Engine Cooling.
  20. Lower the vehicle and support the transaxle.
  21. Remove the accelerator control and the cruise control cable with the bracket from the throttle body.
  22. Remove the heater outlet and inlet hoses from the engine.
    Fig 2: Removing Transaxle-To-Engine
    G02081507Courtesy of GENERAL MOTORS CORP.
  23. Remove the vacuum hoses from the upper intake manifold.
  24. Remove the brake booster vacuum hose from the upper intake manifold.
  25. Remove the fuel lines from the fuel rail. Refer to FUEL LINE DISCONNECT FITTINGS in Engine Performance - Removal and Installation.
  26. Remove the radiator inlet hose from the engine. Refer to RADIATOR HOSE REPLACEMENT - INLET (3.1 L) in Engine Cooling.
  27. Remove the power steering pump and reposition. or POWER STEERING PUMP REPLACEMENT (3.1L) in Power Steering System.
  28. Install the engine lifting device to the engine.
  29. Remove the upper transaxle-to-engine bolts (3,4,5) and the stud (2).
  30. Remove the engine from the vehicle.
  31. Remove the flywheel. Refer to ENGINE FLYWHEEL REMOVAL  .
  32. Install the engine to the engine stand.
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