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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling >> Repair Instructions >> Coolant Air Bleed Pipe Assembly Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Coolant Air Bleed Hose & Pipe
    GM790766Courtesy of GENERAL MOTORS CORP.
  1. Install the coolant air bleed hose (1) onto the pipe (2).
    2. Fig 2: View Of Air Bleed Pipe Sealing Gasket
    GM64262Courtesy of GENERAL MOTORS CORP.
    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. Fig 3: Identifying Coolant Air Bleed Pipe And Bolts
    GM741555Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  3. Install the coolant air bleed pipe (2) and gaskets (3) onto the cylinder heads.
  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. Install the generator. Refer to Generator Replacement .
  6. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill)  or Cooling System Draining and Filling (Vac-N-Fill) .
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