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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View of Transaxle To Engine Mounting
    GM160965Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine from the engine stand.
  2. Install the flywheel. Refer to Engine Flywheel Installation .
  3. With the aid of an assistant, install the engine to the vehicle.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the upper transaxle to the engine bolts (2,3,4,5).

    Tighten:  Tighten the bolts to 75 N.m (55 lb ft).

  5. Remove the engine lifting device.
  6. Install the A/C compressor to the engine. Refer to Compressor Replacement (L26, L32) or Compressor Replacement (LS4) in Heating, Ventilation and Air Conditioning.
  7. Install the heater hoses to the drive belt tensioner. Refer to Heater Inlet Hose Replacement (L26, L32) or Heater Inlet Hose Replacement (RPO LS4) and Heater Hose Replacement - Outlet (L26, L32) or Heater Hose Replacement - Outlet (RPO LS4) in Heating, Ventilation and Air Conditioning.
  8. Install the radiator outlet hose to the engine. Refer to Radiator Outlet Hose Replacement (RPO LS4) or Radiator Outlet Hose Replacement (RPOs L26, L32) in Engine Cooling.
  9. Install the radiator inlet hose to the engine. Refer to Radiator Inlet Hose Replacement (RPO LS4) or Radiator Inlet Hose Replacement (RPOs L26, L32) in Engine Cooling.
  10. Reposition and install the engine wiring harness to the engine as noted during removal.
  11. Connect the upper engine electrical connectors to the following components:
    • BARO sensor, if equipped
    • Manifold absolute pressure (MAP) sensor
    • Exhaust gas recirculation (EGR) valve
    • EVAP purge solenoid
    • Fuel injectors
    • Electronic Throttle Control (ETC)
  12. Install the upper engine wiring harness to the retaining clips.
    13. Fig 2: View Of Power Steering Pump And Mounting Bolts
    GM282122Courtesy of GENERAL MOTORS CORP.
  13. Install the power steering pump to the engine.
  14. Install the power steering pump bolts.

    Tighten:  Tighten the bolts to 34 N.m (25 lb ft).

  15. Connect the A/C vacuum hose to the engine.
  16. Install the vacuum booster hose to the engine. Refer to Vacuum Brake Booster Check Valve and/or Hose Replacement in Hydraulic Brakes.
  17. Install the engine cooling fans. Refer to Fan Shroud Replacement (RPO LS4) or Fan Shroud Replacement (RPOs L26, L32) in Engine Cooling.
  18. Connect the positive battery cable.

    Tighten:  Tighten the cable terminal bolt to 15 N.m (11 lb ft).

  19. Install the engine mount brackets to the upper radiator support. Refer to Engine Mount Strut Bracket Replacement - Upper Radiator Support .
  20. Install the engine mount struts to the engine mount strut brackets. Refer to Engine Mount Strut Replacement - Right Side  and to Engine Mount Strut Replacement - Left Side .
    21. Fig 3: View Of Water Pump Pulley And Bolts
    GM46174Courtesy of GENERAL MOTORS CORP.
  21. Install the water pump pulley.
  22. Install the water pump pulley bolts.

    Tighten:  Tighten the pulley bolts to 13 N.m (116 lb in).

  23. Install the drive belt. Refer to Drive Belt Replacement (L26)  or Drive Belt Replacement (L32) .
  24. Connect the fuel vapor line. Refer to Plastic Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
  25. Connect the fuel line to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
  26. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
  27. Raise the vehicle and remove the transaxle support.
    28. Fig 4: View of Transaxle To Engine Mounting
    GM160965Courtesy of GENERAL MOTORS CORP.
  28. Install the lower transaxle to the engine bolt (6) and the stud (1).

    Tighten:  Tighten the bolt and the stud to 75 N.m (55 lb ft).

  29. Install the oil filter adapter housing. Refer to Oil Filter Adapter and Bypass Valve Assembly Replacement .
    30. Fig 5: Right Exhaust Manifold & Catalytic Converter Pipe
    GM911163Courtesy of GENERAL MOTORS CORP.
  30. Install a new gasket (1) and the catalytic converter (3) to the right exhaust manifold.
  31. Install the exhaust manifold pipe stud nuts (2).

    Tighten:  Tighten the nuts to 35 N.m (26 lb ft).

  32. Install the engine mount lower nuts.

    Tighten:  Tighten the nuts to 47 N.m (35 lb ft).

  33. Install the transaxle brace. Refer to Automatic Transmission Brace Replacement in Automatic Transaxle - 4T65 - E.
  34. Install the engine flywheel-to-torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement in Automatic Transaxle - 4T65 - E.
  35. Install the starter motor. Refer to Starter Motor Replacement (RPO LS4) or Starter Motor Replacement (RPOs L26/L32) in Engine Electrical.
    36. Fig 6: View Of Engine Electrical Connectors (Left Side)
    GM911140Courtesy of GENERAL MOTORS CORP.
  36. Reposition and connect the electrical connectors to the following components:
    • Heated oxygen sensor (H02S)
    • Knock sensors
    • Oil level sensor (10)
    • Oil pressure sensor
    • Vehicle speed sensor (VSS)
  37. Install the oil level sensor harness retainer to the engine.
  38. Install the oil level sensor harness retainer bolt.

    Tighten:  Tighten the bolt to 10 N.m (89 lb in).

  39. Install the engine ground wire (6) and the engine ground wire nut (5) to the transaxle stud.

    Tighten:  Tighten the nut to 35 N.m (26 lb ft).

  40. Install the torque converter covers. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65 - E.
  41. Lower the vehicle.
  42. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L26)  or Fuel Injector Sight Shield Replacement (L32) .
  43. Install the hood. Refer to Hood Replacement in Body Front End.
  44. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (RPO LS4) or Battery Negative Cable Disconnection and Connection (RPOs L26/L32) in Engine Electrical.
  45. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  46. Fill the cooling system. Refer to Draining and Filling Cooling System (L26, L32 GE 47716 Fill) or Draining and Filling Cooling System (L26, L32 Static Fill) or Draining and Filling Cooling System (LS4 GE 47716 Fill) or Draining and Filling Cooling System (LS4 Static Fill) in Engine Cooling.
  47. Inspect for leaks.
  48. Perform the CKP system variation learn procedure. Refer to Crankshaft Position System Variation Learn in Engine Controls - 3.8L.
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