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

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



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



6. Remove the coolant air bleed hose (1) from the pipe (2).

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




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: Refer to Fastener Notice in the Preface section.

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

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

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