Cylinder Head Replacement - Left

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 (LY7, LZ4, LZ9 Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LE5 Static Fill) (Service and Repair) .
3. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement (Service and Repair) .
4. Lower the vehicle.
5. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement (Service and Repair) .
6. Remove the valve rocker arms and the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair) .
7. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (LZ9) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LY7) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LZ4) (Exhaust Manifold Replacement - Left Side) .
8. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement (Service and Repair) .
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 (LZ9) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LY7) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LZ4) (Exhaust Manifold Replacement - Left Side) .




12. Remove the left cylinder head bolts and discard.
13. Remove the left cylinder head.




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 (Overhaul) and Cylinder Head Cleaning and Inspection (Overhaul) .



Installation Procedure





1. Install a new left cylinder head gasket.




2. Install the left cylinder head over the locator pins and the gasket.





Notice: Refer to Fastener Notice .

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).

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 (LZ9) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LY7) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LZ4) (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 (Service and Repair) .
9. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (LZ9) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LY7) (Exhaust Manifold Replacement - Left Side)Exhaust Manifold Replacement - Left Side (LZ4) (Exhaust Manifold Replacement - Left Side) .
10. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair) .
11. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement (Service and Repair) .
12. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement (Service and Repair) .
13. Fill the cooling system. Refer to Cooling System Draining and Filling (LY7, LZ4, LZ9 Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LE5 Static Fill) (Service and Repair) .
14. Inspect for leaks.