GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Terraza Ext. 🢒 Engine 🢒 Engine Mechanical - 3.5L 🢒 Cylinder Head Replacement - Left Side

Special Tools

J 45059 Angle Meter

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Drain the cooling system. Refer to Cooling System Draining and Filling.
  3. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  4. Lower the vehicle.
  5. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  6. Remove the valve rocker arms and the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  7. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement.
  8. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  9. Remove the left spark plug wires from the spark plugs. Refer to Spark Plug Wire Replacement.
  10. Remove the left spark plugs. Refer to Spark Plug Replacement.
  11. Remove the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side.

    12. Object Number: 190595 Size: SH
  12. Remove the left cylinder head bolts and discard.
  13. Remove the left cylinder head.

    14. Object Number: 190594 Size: SH
  14. Remove the left cylinder head gasket.
  15. Clean and inspect the cylinder head and the gasket mating surfaces. Refer to Engine Block Cleaning and Inspection and Cylinder Head Cleaning and Inspection .

Installation Procedure

    Object Number: 190594 Size: SH
  1. Install a new left cylinder head gasket.

    2. Object Number: 190595 Size: SH
  2. Install the left cylinder head over the locator pins and the gasket.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 826677 Size: SH
  3. Install the NEW small hex cylinder head bolts (5 and 8).
  4. Install the NEW large hex cylinder head bolts (1, 2, 3, 4, 6 and 7).

    5. Tighten

    1. Tighten the cylinder head bolts a first pass in sequence to 60 N·m (44 lb ft).
    2. Tighten the cylinder head bolts a final pass in sequence to 140 degrees using the J 45059 .
  5. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side.
  6. Install the left spark plugs. Refer to Spark Plug Replacement.
  7. Install the left spark plug wires to the spark plugs. Refer to Spark Plug Wire Replacement.
  8. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  9. Install the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement.
  10. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  11. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  12. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  13. Fill the cooling system. Refer to Cooling System Draining and Filling.
  14. Inspect for leaks.