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Home >> Chevrolet >> 2008 >> Impala LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 127 (Engine Mechanical - 3.6L (Ly7) (Repair Instructions - 2 Of 5)) >> On-Vehicle Repair Instructions (Part 2) >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Center the steering wheel.
  2. Turn the ignition OFF.
    3. Fig 1: Identifying J 42640
    GM333146Courtesy of GENERAL MOTORS CORP.
  3. Install the J 42640  to the steering column. See Special Tools .
    4. Fig 2: View Of Battery Positive & Negative Cables
    GM772424Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do NOT disconnect the battery cable from the engine.
  4. Disconnect the battery negative cable from the battery and the body. Refer to Battery Negative Cable Replacement (LY7) in Engine Electrical.
    5. IMPORTANT: Do NOT disconnect the battery cable from the engine.
  5. Disconnect the battery positive cable from the battery and the underhood electrical center. Refer to Battery Positive Cable Replacement (LY7) in Engine Electrical.
  6. Position and secure the battery cables to the engine.
  7. Remove the battery. Refer to Battery Replacement (LY7) in Engine Electrical.
  8. Remove the fuel injector sight shield.
    9. Fig 3: View Of Air Inlet Duct
    GM1305320Courtesy of GENERAL MOTORS CORP.
  9. Remove the air cleaner duct.
    10. Fig 4: View Of Cooling Fan Wiring Harness & Electrical Connectors
    GM1348241Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the cooling fan electrical connectors (2 and 3).
  11. Remove the cooling fan wiring harnesses (1 and 4) from the fan shroud.
  12. Secure the wiring harnesses to the vehicle.
  13. Drain the cooling system.
    14. IMPORTANT: Do NOT disconnect the surge hoses from the engine or the radiator.
  14. Disconnect the surge tank outlet hose from the surge tank.
  15. Position and secure the surge hose to the engine.
  16. Disconnect the surge tank inlet (vent) hose from the water outlet housing and the radiator.
  17. Position and secure the surge tank inlet (vent) hose to the vehicle.
  18. Disconnect the heater hoses from the heater core.
    19. Fig 5: Top Of Engine View
    GM1348201Courtesy of GENERAL MOTORS CORP.
  19. Disconnect the purge line (3) from the purge solenoid.
  20. Disconnect the fuel pipe (2) from the fuel rail.
  21. Plug the fuel pipe and cap the fuel rail to prevent fuel loss and/or contamination.
  22. Evacuate the air conditioning system.
  23. Remove the wiper module.
    24. IMPORTANT: Do NOT disconnect the suction hose from the A/C compressor.
  24. Disconnect the air conditioning suction hose from the evaporator and remove the suction hose bracket from the shock tower.
  25. Position and secure suction hose to the engine.
    26. IMPORTANT: Do NOT disconnect the liquid line from the condenser.
  26. Disconnect the air conditioning pressure switch electrical connector and remove the liquid line.
  27. Remove the radiator support brackets.
    28. Fig 6: View Of Vacuum Check Valve & Brake Booster
    GM923830Courtesy of GENERAL MOTORS CORP.
  28. Disconnect the brake booster check valve and vacuum hose (1) from the brake booster (2).
  29. Position and secure the brake booster hose to the engine.
  30. Disconnect the brake fluid level switch electrical connector from the master cylinder.
  31. Disconnect the mass air flow sensor electrical connector.
  32. Unlock and disconnect the instrument panel (I/P) electrical connector from the engine located at the rear of the left (Bank 2) cylinder head.
  33. Position and secure the I/P harness to the vehicle.
    34. Fig 7: View Of Engine Module Wiring Harness Connectors
    GM1348235Courtesy of GENERAL MOTORS CORP.
  34. Disconnect the engine module wiring harness connectors (1-3) from the underhood electrical center.
  35. Disconnect the wiring harness from the transmission control module (TCM).
    36. Fig 8: View Of Ground Bolt & Wire
    GM1348282Courtesy of GENERAL MOTORS CORP.
  36. Remove the ground bolt and wire from the longitudinal rail.
    37. Fig 9: View Of Longitudinal Rail Engine Harness Electrical Connector
    GM1348203Courtesy of GENERAL MOTORS CORP.
  37. Disconnect the engine harness electrical connector at the longitudinal rail.
  38. Position and secure the ground wire, engine harness and TCM harness to the engine.
    39. Fig 10: Removing & Installing Master Cylinder
    GM420706Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do NOT disconnect the brake pipes from the master cylinder.
  39. Remove the master cylinder nuts.
  40. Reposition and secure the master cylinder to the engine.
  41. Relieve the fuel system pressure.
  42. Raise and support the vehicle.
  43. Remove the muffler assembly.
  44. Remove the propeller shaft.
  45. Remove the air deflector.
    46. IMPORTANT: DO NOT remove the water bottle.
  46. Remove the washer bottle bracket.
  47. Disconnect the radiator side air baffles from the radiator.
  48. Disconnect the left front brake pipe retainer with the brake pipe from the longitudinal rail.
  49. Remove the right front brake pipe from the brake pipe bundle retainer.
  50. Disconnect the rear brake pipes (two center pipes) from the brake modulator valve (BPVM).
  51. Cap and/or plug the brake pipes and the BPMV in order to minimize brake fluid loss.
  52. Remove the front tire and wheel assemblies.
  53. Remove the intermediate steering shaft.
    54. Fig 11: Identifying Frame Mounting Nuts
    GM785352Courtesy of GENERAL MOTORS CORP.
  54. Remove the lower engine mount nuts.
    55. Fig 12: View Of Transmission Shift Linkage
    GM785879Courtesy of GENERAL MOTORS CORP.
  55. Disconnect the transmission shift linkage from the transmission.
  56. Disconnect the low oil level sensor electrical connector.
  57. Secure the low oil level sensor electrical connector and harness to the engine mount bracket.
  58. Remove the headlamp leveling sensors.
  59. Secure the shock modules to the lower control arms with a suitable strap in order to prevent damage to the front brake hoses.
    60. Fig 13: View Of Shock Module & Upper Mounting Bolts
    GM742957Courtesy of GENERAL MOTORS CORP.
  60. Remove the right and left shock module upper mounting bolts.
  61. Raise the vehicle enough to place a suitable lift table under the engine, transmission, front frame and front suspension assembly.
  62. Position a suitable powertrain and/or engine lift table below the frame, engine and transmission.
  63. Raise the lift table and/or lower the vehicle to support the frame, engine and transmission.
  64. Remove the transmission brace to underbody bolts.
    65. Fig 14: Identifying Frame Mounting Bolts
    GM822362Courtesy of GENERAL MOTORS CORP.
  65. Remove the front frame bolts (2).
    66. IMPORTANT: Ensure that all the hoses, wires, pipes and shock modules clear the vehicle during the removal process.
  66. With the aid of an assistant, lower the table and/or raise the vehicle to remove the engine, transmission, front frame and front suspension assembly from the vehicle.
    67. Fig 15: View Of Upper ECM Connector
    GM1343429Courtesy of GENERAL MOTORS CORP.
  67. Disconnect the ECM upper (chassis side) electrical connector.
    68. IMPORTANT: Do NOT remove the oxygen sensors.
  68. Remove the catalytic converters with the oxygen sensors.
  69. Remove the thermostat housing with the heater pipes, heater hoses and surge tank outlet hose.
  70. Remove the starter motor. Refer to Starter Motor Replacement (LY7) in Engine Electrical.
  71. Remove the flywheel bolts.
    72. Fig 16: View Of HO2S Connector Bracket
    GM1343618Courtesy of GENERAL MOTORS CORP.
  72. Remove the HO2S connector bracket from the left cylinder head.
  73. Remove the engine wiring harness and related components.
  74. Disconnect the transmission oil cooler (TOC) pipes from the engine, radiator and the transmission.
  75. Disconnect the radiator hoses from the water outlet housing and the coolant inlet pipe.
  76. Disconnect the power steering cooler hoses from the condenser radiator and fan module (CRFM).
  77. Cap and plug the power steering hoses and pipes in order to prevent fluid loss and contamination.
  78. Remove the CRFM with the radiator hoses from the frame.
  79. Install the EN 46114  to the engine. See Special Tools .
  80. Connect a floor crane to the engine lift brackets and raise the floor crane to partially support the engine.
  81. Position a second powertrain lift table below the transmission.
  82. Remove the transmission to engine bolts.
  83. Remove the transmission from the engine.
  84. Remove the drive belts.
  85. Remove the generator and water pump drive belt tensioner.
  86. Remove the A/C compressor and power steering drive belt tensioner.
  87. Remove the idler pulley.
  88. Remove the generator and the generator bracket.
  89. Remove the air conditioning (A/C) compressor.
  90. Remove the power steering pump.
  91. Remove the power steering reservoir from the engine.
  92. Remove the oil level indicator.
  93. Remove the left exhaust manifold.
  94. Remove the oil filter adapter.
  95. Remove the right exhaust manifold.
  96. Remove the crankshaft balancer.
  97. Remove the flywheel.
  98. Remove the intake manifold.
  99. Remove the water outlet.
  100. Remove the block heater. Refer to Coolant Heater Replacement (LY7) in Engine Cooling.
  101. Remove the ECM with the ECM bracket.
  102. Use a floor crane in order to remove the engine from the frame.
  103. Remove the engine mount brackets with the engine mounts.
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