Engine Coolant Air Bleed Pipe Replacement 4.8 L, 5.3 L, and 6.0 L Engines

4 Point Pipe

1. Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical - 4.8 L, 5.3 L, and 6.0 L.
2. Remove the coolant air bleed pipe bolts and pipe.



3. Remove the gaskets from the coolant air bleed pipe.
4. Discard the gaskets.



5. Remove the coolant air bleed hose (2) from the pipe (1).
6. Clean and inspect the coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Cleaning and Inspection in the Engine Unit Repair Manual.

1. Install the coolant air bleed hose (2) onto the pipe (1).




Important: Install the gaskets properly onto the pipe and covers. Position the O-ring seal onto the nipple portion of the pipe.

2. Install the gaskets onto the coolant air bleed pipe.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the coolant air bleed pipe and bolts.

Tighten
Tighten the coolant air bleed pipe bolts to 12 N·m (106 lb in).

4. Install the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical - 4.8 L, 5.3 L, and 6.0 L.

2 Point Pipe

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the coolant air bleed pipe studs (1).
3. Remove the coolant air bleed pipe (2) with gaskets (3).



4. Remove the coolant air bleed pipe cover bolts (1) and covers (2).



5. Remove the gaskets from the coolant air bleed pipe and covers.
6. Discard the gaskets.



7. Remove the coolant air bleed hose (2) from the pipe (1).
8. Clean and inspect the coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Cleaning and Inspection in the Engine Unit Repair Manual.

1. Install the coolant air bleed hose (2) onto the pipe (1).




Important: Install the gaskets properly onto the pipe and covers. Position the O-ring seal onto the nipple portion of the pipe.

2. Install the gaskets onto the coolant air bleed pipe and covers.



3. Install the coolant air bleed pipe (2) and gaskets (3) onto the cylinder heads.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the coolant air bleed pipe studs (1).

Tighten
Tighten the coolant air bleed pipe studs to 12 N·m (106 lb in).




5. Install the coolant air bleed pipe covers (2) and bolts (1).

Tighten
Tighten the coolant air bleed pipe cover bolts to 12 N·m (106 lb in).

6. Fill the cooling system. Refer to Cooling System Draining and Filling .