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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1018 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the engine.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the engine mount to engine mount bracket bolts.

    Tighten:  Tighten the bolts to 65 N.m (48 lb ft).

    3. Fig 1: Installing Engine Mount To Engine Mount Bracket Nuts
    GM310259Courtesy of GENERAL MOTORS CORP.
  3. Remove the lifting devise and the J 41427.
    4. Fig 2: Engine Lift Brackets J 41427
    GM33636Courtesy of GENERAL MOTORS CORP.
  4. Apply threadlock GM P/N 12345382, (Canadian P/N 10953489), or equivalent to the threads of the intake manifold lower bolts.
  5. Install the intake manifold bolts.

    Tighten: 

    1. Tighten the bolts a first pass to 3 N.m (27 lb in).
    2. Tighten the bolts a second pass to 12 N.m (106 lb in).
    3. Tighten the bolts a final pass to 15 N.m (11 lb ft).

  6. Install one transmission bolt until snug.
  7. Remove the support jack from under the transmission.
  8. Install the thermostat and water outlet. Refer to Thermostat Replacement (4.3L Engine) in Engine Cooling.
  9. Slide the P/S pump bracket onto the stud.
  10. Install the bolts and the nut for the P/S pump bracket.
  11. Install the P/S pump rear bracket front nut.
  12. Tighten the P/S pump rear bracket nut.

    Tighten:  Tighten the bolts and nuts to 41 N.m (30 lb ft).

    13. Fig 3: View Of Power Steering Pump Bracket
    GM340090Courtesy of GENERAL MOTORS CORP.
  13. Connect the power brake booster vacuum hose to the vacuum fitting.
    14. Fig 4: Connecting Power Brake Booster Vacuum Hose
    GM869713Courtesy of GENERAL MOTORS CORP.
  14. Connect the EVAP canister harness to the purge solenoid valve.
    15. Fig 5: Connecting EVAP Canister Harness
    GM869711Courtesy of GENERAL MOTORS CORP.
  15. Install the distributor cap. Refer to Distributor Replacement in Engine Controls - 4.3L.
  16. Install the heater hoses. Refer to Heater Hose Replacement - Inlet (LU3) and Heater Hose Replacement - Outlet (LU3) in Heating, Ventilation, and Air Conditioning.
  17. Position the engine wiring harness.
  18. Install the stud holding the engine wiring harness bracket.
  19. Install the engine wiring harness rear bracket nut at the EVAP canister purge solenoid valve.

    Tighten:  Tighten the nut to 9 N.m (80 lb in).

    20. Fig 6: Installing Engine Wiring Harness bracket Stud & Engine wiring Harness Rear Bracket Nut
    GM782176Courtesy of GENERAL MOTORS CORP.
  20. Position the bracket and wiring harness.
  21. Install the junction block bracket bolt.

    Tighten:  Tighten the bolt to 25 N.m (18 lb ft).

    22. Fig 7: Installing Junction Block Bracket Bolt
    GM782670Courtesy of GENERAL MOTORS CORP.
  22. Install the engine wiring harness bracket to the studs.
  23. Install the engine wiring harness bracket nuts.

    Tighten:  Tighten the nuts to 12 N.m (106 lb in).

    24. Fig 8: Installing Engine Wiring Harness Bracket Nuts
    GM310241Courtesy of GENERAL MOTORS CORP.
  24. Position the harness ground (4) and ground strap (5).
  25. Install the harness ground bolt.

    Tighten:  Tighten the bolt to 16 N.m (12 lb ft).

  26. Connect the following electrical connectors:
    • Knock sensor (1)
    • CMP sensor (2)
    • Fuel pump/oil pressure sensor (3)
    • Distributor (2)
    27. Fig 9: View Of Ground Strap And CMP & Fuel Pump/Oil Pressure Sensor Connectors
    GM782680Courtesy of GENERAL MOTORS CORP.
  27. Install the engine wiring harness ground nut and ground wire (4) to the rear of the right cylinder head.

    Tighten:  Tighten the nut to 16 N.m (12 lb ft).

  28. Connect the following electrical connectors:
    • Ignition coil (1)
    • Ignition coil driver (2)
    • Generator (3)
    29. Fig 10: Ignition Coil, Ignition Coil Driver, Ground Nut/Cable & Generator Electrical Connectors
    GM782177Courtesy of GENERAL MOTORS CORP.
  29. Connect the following electrical connectors:
    • EVAP canister purge solenoid valve (1)
    • MAP sensor (2)
    30. Fig 11: EVAP Canister Purge Solenoid Valve & MAP Sensor
    GM782178Courtesy of GENERAL MOTORS CORP.
  30. Install the engine wiring harness clip bolt (4).

    Tighten:  Tighten the bolt to 9 N.m (80 lb in).

  31. Connect the following electrical connectors:
    • TP sensor (1)
    • IAC motor (2)
    • Control port injector module (3)
    • ECT sensor (5)
    32. Fig 12: View Of TP Sensor, IAC Motor, ECT Sensor, Control Port Injector Module & Engine Harness Clip Bolt
    GM782174Courtesy of GENERAL MOTORS CORP.
  32. Install the positive cable and nut to the generator.

    Tighten:  Tighten the nut to 18 N.m (13 lb ft).

  33. Connect the following electrical connectors:
    • A/C pressure switch (4), if equipped
    • A/C compressor clutch (1), if equipped
    34. Fig 13: A/C Pressure Switch & Compressor Clutch
    GM782175Courtesy of GENERAL MOTORS CORP.
  34. If equipped, install the A/C hoses. Refer to Discharge Hose Replacement (LB7) or Discharge Hose Replacement (LR4,LM7,LQ4,L18) and Suction Hose Replacement (LB7 w/Denso) or Suction Hose Replacement (LR4, LM7, LQ4, L18 w/Denso) in Heating, Ventilation, and Air Conditioning.
  35. Position the bracket and cables.
  36. Install the accelerator control cable bracket with the cables attached, to the throttle body.
  37. Install the accelerator control cable bracket nuts.

    Tighten:  Tighten the nuts to 9 N.m (80 lb in).

    38. Fig 14: View Of Accelerator Control Cable Bracket
    GM398030Courtesy of GENERAL MOTORS CORP.
  38. Install the accelerator cable to the throttle body lever.
    39. Fig 15: Identifying Accelerator Cable/Throttle Body Lever
    GM325556Courtesy of GENERAL MOTORS CORP.
    CAUTION: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.
    In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.
  39. Install the accelerator cable to the accelerator control cable bracket.
    40. Fig 16: View Of Accelerator Cable To Accelerator Control Cable Bracket
    GM781990Courtesy of GENERAL MOTORS CORP.
  40. Install the accelerator cable to the throttle body lever.
    41. Fig 17: Connecting Accelerator Cable To Throttle Body Lever
    GM781992Courtesy of GENERAL MOTORS CORP.
  41. If equipped, install the cruise control cable to the accelerator control cable bracket.
    42. Fig 18: Installing Cruise Control Cable
    GM781993Courtesy of GENERAL MOTORS CORP.
  42. If equipped, connect the cruise control cable to the throttle body lever.
  43. Install the radiator outlet hose to the water pump.
  44. Install the radiator outlet hose to the surge tank.
    45. Fig 19: Installing Radiator Outlet Hose
    GM367001Courtesy of GENERAL MOTORS CORP.
  45. Position the radiator outlet hose clamps.
  46. Install the radiator inlet hose to the thermostat housing.
    47. Fig 20: Installing Radiator Inlet Hose
    GM367002Courtesy of GENERAL MOTORS CORP.
  47. Position the radiator inlet hose clamp.
  48. Install the drive belt. Refer to Drive Belt Replacement .
  49. Install the lower fan shroud. Refer to Fan Shroud Replacement - Lower in Engine Cooling.
  50. Install the fuel pipes/hoses. Refer to Fuel Hose/Pipes Replacement - Engine Compartment in Engine Controls - 4.3L.
  51. Remove the hood hinge bolt from the service position (2).
    52. Fig 21: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  52. Lower the hood to the normal position.
  53. Install the hood hinge bolts.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  54. Raise the vehicle.
  55. Install the transmission bolts

    Tighten:  Tighten the bolts to 50 N.m (37 lb ft).

  56. If equipped, Install the torque converter bolts.

    Tighten:  Tighten the bolts to 63 N.m (47 lb ft).

    57. Fig 22: Flywheel-To-Torque Converter Bolts
    GM9096Courtesy of GENERAL MOTORS CORP.
  57. Install the ground bolt (3) holding the negative battery cable (6) and ground cable (4) to the engine.
  58. Connect the CKP sensor electrical connector (5) and install the harness to the retainer clip.
    59. Fig 23: View Of Oil Level Sensor Electrical Connector, CKP Electrical Connector & Battery Ground Bolt
    GM782731Courtesy of GENERAL MOTORS CORP.
  59. Install the battery cable bracket bolts.

    Tighten:  Tighten the bolts to 12 N.m (106 lb in).

    60. Fig 24: Installing Battery Cable Bracket Bolts
    GM310250Courtesy of GENERAL MOTORS CORP.
  60. Install the catalytic converter. Refer to Catalytic Converter Replacement (4.3L, 4.8L, and 5.3L Engines) in Engine Exhaust.
  61. Install the positive battery cable clip bolt (2).
    62. Fig 25: Installing Positive Battery Cable Clip Bolt
    GM869722Courtesy of GENERAL MOTORS CORP.
  62. Install the transmission cover.

    Tighten:  Tighten the bolts to 12 N.m (106 lb in).

    63. Fig 26: Installing Transmission Cover
    GM869720Courtesy of GENERAL MOTORS CORP.
  63. Install the starter. Refer to Starter Motor Replacement (4.3L Engine) in Engine Electrical.
  64. If equipped, install the engine shield. Refer to Engine Protection Shield Replacement in Frame and Underbody.
  65. If equipped, install the oil pan skid plate and bolts.

    Tighten:  Tighten the bolts to 20 N.m (15 lb ft).

    66. Fig 27: Identifying Oil Pan Skid Plate
    GM309158Courtesy of GENERAL MOTORS CORP.
  66. Lower the vehicle.
  67. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  68. Perform the engine prelube procedure. Refer to Engine Prelubing 
  69. Add engine oil supplement GM P/N 1052367 (Canadian P/N 992869), or equivalent to the engine oil.
  70. Fill the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  71. If equipped, bleed the hydraulic clutch. Refer to Hydraulic Clutch Bleeding in Clutch.
  72. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging in Heating, Ventilation, and Air Conditioning.
    IMPORTANT: After an overhaul, the engine should be tested. Use the following procedure after the engine is installed in the vehicle.
  73. Disable the ignition system.
  74. Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.
  75. Start the engine and listen for unusual noises.
  76. Check the oil pressure gauge or light and confirm that the engine has acceptable oil pressure.
  77. If necessary, install an oil pressure gauge and measure the oil pressure.
  78. Run the engine speed at about 1,000 RPM until the engine has reached normal operating temperature.
  79. Listen for sticking valve lifters, or other unusual noises.
  80. Inspect for fuel, oil, and/or coolant leaks while the engine is running.
  81. Verify that the distributor is properly positioned.
  82. Perform a final inspection for the proper oil and coolant levels.
  83. Close the hood.
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