GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2009 🢒 H2 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Engine Coolant Air Bleed Pipe Replacement

Removal Procedure
  1. Drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Remove the generator. Refer to Generator Replacement.

    3. Object Number: 741555 Size: SH
  3. Remove the coolant air bleed pipe bolts (1).
  4. Remove the coolant air bleed pipe (2) with gaskets (3).

    5. Object Number: 64262 Size: SH
  5. Remove the gaskets from the coolant air bleed pipe and covers.
  6. Discard the gaskets.

    7. Object Number: 790766 Size: SH
  7. Remove the coolant air bleed hose (1) from the pipe (2).

Installation Procedure

    Object Number: 790766 Size: SH
  1. Install the coolant air bleed hose (1) onto the pipe (2).

    2. Object Number: 64262 Size: SH

    Note: 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. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 741555 Size: SH
  3. Install the coolant air bleed pipe (2) and gaskets (3) onto the cylinder heads.
  4. Install the coolant air bleed pipe bolts (1).

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

  5. Install the generator. Refer to Generator Replacement.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling.