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Home >> Pontiac >> 2008 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions - On Vehicle >> Cylinder Head Replacement - Left Side >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Install the valves, the seals, the springs and the caps to the cylinder head. Refer to Cylinder Head Assemble .
    2. NOTE: 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.
    Fig 1: Left Cylinder Head Gasket
    GM406043Courtesy of GENERAL MOTORS CORP.
  2. Position the head gasket with the arrow pointing to the front of the engine.
    3. Fig 2: Left Cylinder Head & Bolts
    GM153597Courtesy of GENERAL MOTORS CORP.
  3. Install the cylinder head.
    4. NOTE: 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.
    NOTE: 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.
    Fig 3: Identifying Cylinder Head Bolt Tightening Sequence
    GM38826Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  4. Install the new cylinder head bolts (1-8).

    Tighten: 

    1. Tighten the cylinder head bolts (1-8) in the following sequence to 50 N.m (37 lb ft).
    2. Use the J 45059  to rotate the cylinder head bolts in the following sequence (1-8) an additional 120 degrees.

  5. Install the left push rods and rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  6. Install the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side .
  7. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (L26) .
  8. Install the left spark plugs to the left cylinder head. Refer to Spark Plug Replacement .
  9. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  10. Install the left engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Left Side .
  11. Install the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Side .
  12. Install the ignition control module bracket and the ignition control module to the left cylinder head. Refer to Ignition Control Module Replacement .
  13. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement .
  14. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  15. Fill the cooling system. Refer to Cooling System Draining and Filling (L26 GE 47716 Fill) or Cooling System Draining and Filling (L26 Static Fill) .
  16. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L26) .
  18. Inspect for leaks.
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