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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 >> Installation Procedure

Installation 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. Install the engine mount brackets with the engine mounts.
  2. Use a floor crane in order to install the engine to the frame.
  3. Install the ECM with the ECM bracket.
  4. Install the water outlet.
  5. Install the block heater. Refer to Coolant Heater Replacement (LY7) in Engine Cooling.
  6. Install the flywheel. Refer to.
  7. Install the intake manifold.
  8. Install the crankshaft balancer.
  9. Install the right exhaust manifold.
  10. Install the oil filter adapter.
  11. Install the left exhaust manifold.
  12. Install the oil level indicator.
  13. Install the generator and the generator bracket.
  14. Install the power steering pump.
  15. Install the power steering reservoir to the engine.
  16. Install the A/C compressor.
  17. Install the idler pulley.
  18. Install the A/C compressor and power steering drive belt tensioner.
  19. Install the generator and water pump drive belt tensioner.
  20. Install the drive belts.
  21. Install the transmission-to-engine and flywheel-to-torque convertor bolts.
  22. Install the starter motor. Refer to Starter Motor Replacement (LY7) in Engine Electrical.
  23. Remove the EN 46114  from the engine. See Special Tools .
  24. Install the CRFM with the radiator hoses to the frame.
  25. Connect the power steering cooler hoses to the CRFM.
  26. Connect the radiator hoses to the water outlet housing and the coolant inlet pipe.
  27. Install the transmission oil cooler (TOC) pipes to the engine, radiator and the transmission.
  28. Install the engine wiring harness and related components.
    29. Fig 1: View Of HO2S Connector Bracket
    GM1343618Courtesy of GENERAL MOTORS CORP.
  29. Install the HO2S connector bracket to the left cylinder head.
  30. Install the thermostat housing with the heater pipes, heater hoses and surge tank outlet hose.
  31. Install the catalytic converters with the oxygen sensors.
  32. Install the fuel lines to the fuel rail and the EVAP purge solenoid.
    33. Fig 2: View Of Upper ECM Connector
    GM1343429Courtesy of GENERAL MOTORS CORP.
  33. Connect the ECM upper (chassis side) electrical connector.
    34. IMPORTANT: Ensure that all the hoses, wires, pipes and shock modules clear the vehicle during the installation process.
  34. With the aid of an assistant, raise the table and/or lift the vehicle to install the engine, transmission, front frame and front suspension assembly to the vehicle.
    35. Fig 3: Identifying Frame Mounting Bolts
    GM822362Courtesy of GENERAL MOTORS CORP.
  35. Install the front frame bolts (2).
  36. Install the transmission support to underbody bolts.
  37. Remove the powertrain lift/support table.
    38. Fig 4: View Of Shock Module & Upper Mounting Bolts
    GM742957Courtesy of GENERAL MOTORS CORP.
  38. Install the right and left shock module upper mounting bolts.
  39. Secure the shock modules to the front frame with mechanics wire to avoid stretching the front brake hoses.
  40. Install the headlamp leveling sensors.
    41. Fig 5: View Of Transmission Shift Linkage
    GM785879Courtesy of GENERAL MOTORS CORP.
  41. Connect the transmission shift linkage to the transmission.
  42. Connect the low oil level sensor electrical connector.
    43. Fig 6: Identifying Frame Mounting Nuts
    GM785352Courtesy of GENERAL MOTORS CORP.
  43. Install the lower engine mount nuts.
  44. Install the intermediate steering shaft.
  45. Install the front tire and wheel assemblies.
  46. Install the front brake pipes and retainers to the underbody.
  47. Connect the rear brake pipes (two center pipes) to the brake pressure modulator valve (BPVM).
  48. Connect the radiator side air baffles to the radiator.
  49. Install the washer bottle bracket.
  50. Install the air deflector.
  51. Install the propeller shaft.
  52. Install the muffler assembly.
    53. Fig 7: Removing & Installing Master Cylinder
    GM420706Courtesy of GENERAL MOTORS CORP.
  53. Install the master cylinder.
    54. Fig 8: View Of Longitudinal Rail Engine Harness Electrical Connector
    GM1348203Courtesy of GENERAL MOTORS CORP.
  54. Connect the engine harness electrical connector at the longitudinal rail.
    55. Fig 9: View Of Ground Bolt & Wire
    GM1348282Courtesy of GENERAL MOTORS CORP.
  55. Install the ground wire and bolt to the longitudinal rail.

    Tighten:  Tighten the engine harness ground wire to longitudinal rail bolt to 10 N.m (89 lb in).

  56. Connect the wiring harness to the transmission control module (TCM).
    57. Fig 10: View Of Engine Module Wiring Harness Connectors
    GM1348235Courtesy of GENERAL MOTORS CORP.
  57. Connect the engine module wiring harness connectors (1-3) to the underhood electrical center.
  58. Connect and lock the instrument panel (I/P) electrical connector to the engine at the rear of the left (Bank 2) cylinder head.
  59. Connect the mass air flow sensor electrical connector.
  60. Connect the brake fluid level switch electrical connector from the master cylinder.
    61. Fig 11: View Of Vacuum Check Valve & Brake Booster
    GM923830Courtesy of GENERAL MOTORS CORP.
  61. Connect the brake booster vacuum hose (1) to the brake booster (2).
  62. Install the radiator support brackets.
    63. Fig 12: Top Of Engine View
    GM1348201Courtesy of GENERAL MOTORS CORP.
  63. Connect the purge line (3) to the purge solenoid.
  64. Connect the fuel pipe (2) to the fuel rail.
  65. Connect the heater hoses to the heater core.
  66. Install the air inlet duct.
  67. Position and secure the surge tank inlet (vent) hose to the vehicle.
  68. Connect the surge tank inlet (vent) hose to the water outlet housing and the radiator.
  69. Connect the surge tank outlet hose to the surge tank.
  70. Connect the air conditioning pressure switch electrical connector and the liquid line to the evaporator.
  71. Connect the air conditioning suction hose to the evaporator and install the suction hose bracket to the shock tower.
    72. Fig 13: View Of Air Inlet Duct
    GM1305320Courtesy of GENERAL MOTORS CORP.
  72. Install the air cleaner duct.
    73. Fig 14: View Of Cooling Fan Wiring Harness & Electrical Connectors
    GM1348241Courtesy of GENERAL MOTORS CORP.
  73. Install the cooling fan wiring harnesses (1 and 4) to the fan shroud.
  74. Install the cooling fan electrical connectors (2 and 3).
  75. Install the wiper module.
  76. Install the battery. Refer to Battery Replacement (LY7) in Engine Electrical.
  77. Install the fuel injector sight shield.
    78. Fig 15: View Of Battery Positive & Negative Cables
    GM772424Courtesy of GENERAL MOTORS CORP.
  78. Connect the battery positive cable to the battery and the underhood electrical center. Refer to Battery Positive Cable Replacement (LY7) in Engine Electrical.
  79. Connect the battery negative cable from the battery and the body. Refer to Battery Negative Cable Replacement (LY7) in Engine Electrical.
    80. Fig 16: Identifying J 42640
    GM333146Courtesy of GENERAL MOTORS CORP.
  80. Install the J 42640  from the steering column. See Special Tools .
  81. Fill the cooling system.
  82. Charge the air conditioning system.
  83. Bleed the brake rear circuits.
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