GM Service Manual Online
For 1990-2009 cars only

Cylinder Head Replacement Right Rear

Special Tools

J 36660-A Electronic Torque Angle Meter

Removal Procedure

Notice: Modifications made to the engine or its individual components can effect the vehicle's emission controls and may cause the Malfunction Indicator Lamp (MIL), Check Engine, or Service Engine Soon lamp to illuminate. Modifications may also cause the vehicle to fail a required Emission Inspection/Maintenance test.

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  3. Remove the drive belt. Refer to Drive Belt Replacement .
  4. Drain the engine coolant from the cooling system. Refer to Cooling System Draining and Filling .
  5. Remove the generator. Refer to Generator Replacement or Generator Replacement .
  6. Disconnect the three-way catalytic converter from the right exhaust manifold. Refer to Catalytic Converter Replacement .
  7. Remove the engine mount struts. Refer to Engine Mount Strut Replacement and Engine Mount Strut Replacement .
  8. Rotate the engine forward for access.
  9. Remove the drive belt tensioner. Refer to Intake Manifold Replacement .
  10. Remove the power steering pump. Refer to Power Steering Pump Replacement .
  11. Remove the heater hoses from the engine. Refer to Heater Hoses Replacement .
  12. Remove the right spark plug wires. Refer to Spark Plug Wire Harness Replacement .
  13. Remove the right spark plugs. Refer to Spark Plug Replacement .
  14. Disconnect the oxygen sensor electrical connector.
  15. Carefully remove the throttle body air inlet duct.
  16. Disconnect the throttle and cruise control cables. Refer to Accelerator Control Cable Replacement for the 3.8L engine.
  17. Disconnect the electrical connector from the throttle vacuum line.
  18. Remove the fuel rail. Refer to in Fuel Injection Fuel Rail Assembly Replacement for the 3.8L engine.

  19. Object Number: 190554  Size: SH
  20. Remove the exhaust gas recirculation (EGR) valve shield bracket bolt and nut.
  21. Remove the EGR valve shield bracket.

  22. Object Number: 190555  Size: SH
  23. Remove the EGR valve nuts.
  24. Remove the EGR valve.

  25. Object Number: 190556  Size: SH
  26. Remove the EGR valve outlet pipe bolt and nut.
  27. Remove the EGR valve outlet pipe.

  28. Object Number: 190557  Size: SH
  29. Remove the EGR valve adapter bolt from the right exhaust manifold.

  30. Object Number: 190558  Size: SH
  31. Remove the EGR valve adapter bolts from the right cylinder head.
  32. Remove the EGR valve adapter from the right cylinder head.
  33. Remove the upper intake manifold. Refer to Intake Manifold Replacement .
  34. Remove the engine lift hook.
  35. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  36. Remove the right exhaust manifold. Refer to Exhaust Manifold Replacement .
  37. Remove the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  38. Remove the right rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement .

  39. Object Number: 153598  Size: MH
  40. Remove the cylinder head bolts. Discard the cylinder head bolts.
  41. Remove the cylinder head.

  42. Object Number: 190560  Size: SH
  43. Remove the cylinder head gasket.
  44. Remove the springs, the caps, the seals, and the valves from the cylinder head. Refer to Cylinder Head Disassemble .
  45. Clean the mating surfaces on the cylinder head, cylinder block and the intake manifold.
  46. Clean the cylinder block bolt hole threads. Repair the threads if necessary.
  47. Inspect the engine block. Refer to Engine Block Cleaning and Inspection .
  48. Inspect the cylinder head. Refer to Cylinder Head Clean and Inspect .

Installation Procedure

Notice: Modifications made to the engine or its individual components can effect the vehicle's emission controls and may cause the Malfunction Indicator Lamp (MIL), Check Engine, or Service Engine Soon lamp to illuminate. Modifications may also cause the vehicle to fail a required Emission Inspection/Maintenance test.

  1. Install the springs, the caps, the seals, and the valves to the cylinder head. Refer to Cylinder Head Assemble .

  2. Object Number: 190560  Size: SH

    Notice: Head gaskets are not interchangeable. The head gasket must be installed with the arrow pointing to the front of the engine. Installing the head gasket in any other direction will cause gasket failure and possible engine failure.

  3. Position the head gasket with the arrow pointing to the front of the engine.

  4. Object Number: 153598  Size: MH
  5. Install the cylinder head.

  6. Object Number: 38826  Size: SH

    Notice: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

    Notice: This engine uses special torque to yield head bolts. This design bolt requires a special tightening procedure. Failure to follow the given procedure will cause head gasket failure and possible engine damage.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the new cylinder head bolts.
  8. Tighten

    1. Tighten the cylinder head bolts in sequence to 50 N·m (37 lb ft).
    2. Rotate each cylinder head bolt 120 degrees in sequence. Use the J 36660-A .
  9. Install the right push rods and rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  10. Install the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  11. Install the right exhaust manifold. Refer to Exhaust Manifold Replacement .
  12. Install the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  13. Install the engine lift hook.
  14. Install the upper intake manifold. Refer to Intake Manifold Replacement .

  15. Object Number: 190558  Size: SH
  16. Install the EGR valve adapter to the right cylinder head.
  17. Install the EGR valve adapter bolts to the right cylinder head.
  18. Tighten
    Tighten the EGR valve adapter bolts to 50 N·m (37 lb ft).


    Object Number: 190557  Size: SH
  19. Install the EGR valve adapter bolt to the right exhaust manifold.
  20. Tighten
    Tighten the EGR valve adapter bolt to 29 N·m (21 lb ft).


    Object Number: 190556  Size: SH
  21. Install the EGR valve outlet pipe.
  22. Install the EGR valve outlet pipe bolt and nut.
  23. Tighten
    Tighten the EGR valve outlet pipe bolt and nut to 29 N·m (21 lb ft).


    Object Number: 190555  Size: SH
  24. Install the EGR valve.
  25. Install the EGR valve nuts.
  26. Tighten
    Tighten the EGR valve nuts to 29 N·m (21 lb ft).


    Object Number: 190554  Size: SH
  27. Install the EGR valve shield bracket.
  28. Install the EGR valve shield bracket bolt and nut.
  29. Tighten
    Tighten the EGR valve shield bracket bolt and nut to 10 N·m (89 lb in).

  30. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  31. Connect the electrical connector to the throttle vacuum line.
  32. Connect the throttle and cruise control cables. Refer to in Accelerator Control Cable Replacement for the 3.8L engine.
  33. Carefully install the throttle body air inlet duct.
  34. Connect the oxygen sensor electrical connector.
  35. Install the right spark plugs. Refer to Spark Plug Replacement .
  36. Install the right spark plug wires. Refer to Spark Plug Wire Harness Replacement .
  37. Install the heater hoses to the engine. Refer to Heater Hoses Replacement .
  38. Install the power steering pump. Refer to Power Steering Pump Replacement .
  39. Install the drive belt tensioner. Refer to Intake Manifold Replacement .
  40. Return the engine to the proper position.
  41. Install the engine mount struts. Refer to Engine Mount Strut Replacement and Engine Mount Strut Replacement .
  42. Connect the three-way catalytic converter to the right exhaust manifold. Refer to Catalytic Converter Replacement .
  43. Install the generator. Refer to Generator Replacement or Generator Replacement .
  44. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling .
  45. Install the drive belt. Refer to Drive Belt Replacement .
  46. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  47. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  48. Inspect for proper fluid levels.
  49. Inspect for leaks.

Cylinder Head Replacement Left Front

Special Tools

J 36660-A Electronic Torque Angle Meter

Removal Procedure

Notice: Modifications made to the engine or its individual components can effect the vehicle's emission controls and may cause the Malfunction Indicator Lamp (MIL), Check Engine, or Service Engine Soon lamp to illuminate. Modifications may also cause the vehicle to fail a required Emission Inspection/Maintenance test.

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Drain the cooling system of engine coolant. Refer to Cooling System Draining and Filling .
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  4. Carefully remove the throttle body air inlet duct.
  5. Remove the left engine mount strut bracket.
  6. Remove the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement .
  7. Remove the upper intake manifold. Refer to Intake Manifold Replacement .
  8. Remove the lower intake manifold. Refer to Intake Manifold Replacement .
  9. Remove the left exhaust manifold. Refer to Exhaust Manifold Replacement .
  10. Remove the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  11. Remove the left rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement .

  12. Object Number: 153597  Size: MH
  13. Remove the cylinder head bolts. Discard the cylinder head bolts.
  14. Remove the cylinder head.

  15. Object Number: 406043  Size: SH
  16. Remove the cylinder head gasket.
  17. Remove the springs, the caps, the seals, and the valves from the cylinder head. Refer to Cylinder Head Disassemble .
  18. Clean the mating surfaces on the cylinder head, cylinder block and the intake manifold.
  19. Clean the cylinder block bolt hole threads. Repair the threads if necessary.
  20. Inspect the engine block. Refer to Engine Block Cleaning and Inspection .
  21. Inspect the cylinder head. Refer to Cylinder Head Clean and Inspect .

Installation Procedure

Notice: Modifications made to the engine or its individual components can effect the vehicle's emission controls and may cause the Malfunction Indicator Lamp (MIL), Check Engine, or Service Engine Soon lamp to illuminate. Modifications may also cause the vehicle to fail a required Emission Inspection/Maintenance test.

  1. Install the springs, the caps, the seals, and the valves to the cylinder head. Refer to Cylinder Head Assemble .

  2. Object Number: 406043  Size: SH
  3. Position the head gasket with the arrow pointing to the front of the engine.

  4. Object Number: 153597  Size: MH
  5. Install the cylinder head.

  6. Object Number: 38826  Size: SH

    Notice: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

    Notice: This engine uses special torque to yield head bolts. This design bolt requires a special tightening procedure. Failure to follow the given procedure will cause head gasket failure and possible engine damage.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the new cylinder head bolts.
  8. Tighten

        • Tighten the cylinder head bolts in sequence to 50 N·m (37 lb ft).
        • Rotate each cylinder head bolt 120 degrees in sequence. Use the J 36660-A .
  9. Install the left push rods and rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  10. Install the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  11. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement .
  12. Install the lower intake manifold. Refer to Intake Manifold Replacement .
  13. Install the upper intake manifold. Refer to Intake Manifold Replacement .
  14. Install the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement .
  15. Install the left engine mount strut bracket.
  16. Carefully install the throttle body air inlet duct.
  17. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  18. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling .
  19. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  20. Inspect for proper fluid levels.
  21. Inspect for leaks.