Cylinder Head Replacement - Right

Cylinder Head Replacement - Right Side

Special Tools

J 45059 Angle Meter

Removal Procedure




1. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement (Service and Repair).
2. Lower the vehicle.
3. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement (Service and Repair).
4. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair).
5. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side (LY7) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ4) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ9 w/RPO MT2) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ9 w/RPO M15) (Service and Repair).
6. Remove the right spark plugs. Refer to Spark Plug Replacement (Service and Repair).
7. Remove the fuel line bracket bolt and stud.
8. Remove the fuel line bracket.
9. Remove the generator. Refer to Generator Replacement (LE5) (Service and Repair)Generator Replacement (LY7) (Service and Repair)Generator Replacement (LZ4) (Service and Repair)Generator Replacement (LZ9) (Service and Repair).




10. Remove and discard the cylinder head bolts.
11. Remove the cylinder head.




12. Remove and discard the cylinder head gasket.
13. Remove the cylinder head locator dowel pins, if necessary.
14. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection (Overhaul).

Installation Procedure





Caution: Head gaskets are specific for right hand and left hand applications, and also must be installed with the correct side facing up. Note the markings (1) on the head gaskets for proper installation. Failure to do so may lead to engine damage.

1. Install the cylinder head locator dowel pins, if necessary.
2. Inspect the cylinder head locator dowel pins for proper installation.




3. Install a NEW cylinder head gasket.




4. Install the cylinder head onto the locator pins and the engine.
Caution: This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

5. Install NEW cylinder head bolts finger tight.

Left - Right:

Caution: Refer to Fastener Caution (Fastener Caution).

6. Install the NEW small hex cylinder head bolts (5 and 8).
7. 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 Nm (44 lb ft).
2. Tighten the cylinder head bolts a final pass in sequence to 140 degrees using the J 45059 .

8. Install the generator. Refer to Generator Replacement (LE5) (Service and Repair)Generator Replacement (LY7) (Service and Repair)Generator Replacement (LZ4) (Service and Repair)Generator Replacement (LZ9) (Service and Repair).




9. Position the fuel line bracket to the cylinder head.
10. Install the fuel line bracket bolt and stud.

Tighten the bolt and the stud to 50 Nm (37 lb ft).

11. Install the right spark plugs. Refer to Spark Plug Replacement (Service and Repair).
12. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side (LY7) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ4) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ9 w/RPO MT2) (Service and Repair)Exhaust Manifold Replacement - Right Side (LZ9 w/RPO M15) (Service and Repair).
13. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair).
14. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement (Service and Repair).
15. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement (Service and Repair).
16. Inspect for leaks.