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Cylinder Head Replacement - Left Side




Cylinder Head Replacement - Left Side

Special Tools

* J 42385-100 - Head/Main Bolt Thread Repair Kit

* J 45059 - Angle Meter

Removal Procedure

1. Drain the coolant. Refer to Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (LFX, Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (LSA, LS3, L99 Static Fill) Cooling System Draining and Filling (Static Fill).

2. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement Service and Repair.

3. Remove the engine coolant air bleed hose.

4. Remove the power steering pump bracket. Refer to Power Steering Pump Replacement (L99, LS3) Power Steering Pump Replacement (LFX) .

5. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (V8) Exhaust Manifold Replacement - Left Side (V8).

6. Remove the intake manifold. Refer to Intake Manifold Replacement Intake Manifold Replacement.

7. Remove the Engine Coolant Air Bleed Pipe and Hole Cover. Refer to Engine Coolant Air Bleed Pipe and Hole Cover Removal (LS3 or L99) 15. Engine Block Valley Cover RemovalEngine Coolant Air Bleed Pipe and Hole Cover Removal (LSA) 14. Engine Coolant Air Bleed Pipe and Hole Cover Removal.

8. Remove the engine wiring harness ground bolt from the rear of the left cylinder head.

9. Reposition the engine wire harness ground strap away from the cylinder head.

10. Disconnect and unclip electrical as necessary.





Note: The cylinder head bolts are NOT reusable.

11. Remove the cylinder head bolts.

Caution:
After removal, place the cylinder head on 2 wood blocks in order to prevent damage to the sealing surfaces.

12. Remove the cylinder head.




13. Remove the cylinder head gasket (217).

14. Discard the gasket.

15. Discard all M8 and M11 cylinder head bolts.

16. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection 56. Cylinder Head Cleaning and Inspection.

Installation Procedure





Warning: Refer to Safety Glasses Warning Safety Glasses Warning.


Caution:
Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.

Note: If installing a new cylinder head it is necessary to install a new engine coolant air bleed plug into the rear coolant passage of the cylinder head. Refer to Cylinder Head Assemble 58. Cylinder Head Assemble.

Note:

* Do not use the cylinder head bolts again. Install NEW cylinder head bolts during assembly.

* Do not use any type of sealant on the cylinder head gasket, unless specified.

* The cylinder head gaskets must be installed in the proper direction and position.

1. Clean the engine block cylinder head bolt holes, if required.
Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.

2. Spray cleaner into the hole. Refer to Adhesives, Fluids, Lubricants, and Sealers [1][2]Fluid Type Specifications for the correct part number.

3. Clean the cylinder head bolt holes with compressed air.

4. Install the cylinder head locating pins (230).




5. Inspect the locating pins for proper installation.




6. Install the NEW cylinder head gasket (217) onto the locating pins.




7. Install the cylinder head (218) onto the locating pins and the gasket.

8. Install the NEW cylinder head bolts (200, 221).





Caution: Refer to Fastener Caution Fastener Caution.

9. Tighten the cylinder head bolts.

1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 Nm (22 lb ft).

2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 - angle meter.

3. Tighten the M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 - angle meter.

4. Tighten the M8 cylinder head bolts (11-15) to 30 Nm (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.

10. Install the intake manifold. Refer to Intake Manifold Replacement Intake Manifold Replacement.

11. Position the engine wire harness ground strap against the cylinder head.

12. Install the engine wiring harness ground bolt to the rear of the left cylinder head. Tighten the bolt to 32 Nm (24 lb ft).

13. Install Engine Coolant Air Bleed Pipe and Hole Cover. Refer to Engine Coolant Air Bleed Pipe and Hole Cover Installation (LS3 or L99) 105. Engine Coolant Air Bleed Pipe and Hole Cover InstallationEngine Coolant Air Bleed Pipe and Hole Cover Installation (LSA) 105. Engine Coolant Air Bleed Pipe and Hole Cover Installation

14. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (V8) Exhaust Manifold Replacement - Left Side (V8).

15. Install the power steering pump bracket. Refer to Power Steering Pump Replacement (L99, LS3) Power Steering Pump Replacement (LFX) .

16. Install the engine coolant air bleed hose.

17. Install the valve rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement Service and Repair.

18. Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (LFX, Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (LSA, LS3, L99 Static Fill) Cooling System Draining and Filling (Static Fill).

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