GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Water Crossover Cleaning and Inspection

Cleaning Procedure

    Object Number: 1351825 Size: SH
  1. Clean the engine coolant crossover (308) and water outlet (311) in solvent.

    2. Caution: Refer to Safety Glasses Caution in the Preface section.

  2. Dry the components with compressed air.

Inspection Procedure

    Object Number: 1351825 Size: SH
  1. Inspect the engine coolant crossover (308) for the following conditions:
    2. • Corrosion or damage to the gasket sealing surfaces
    • Corrosion or damage to the thermostat bypass hose fitting
    • Corrosion or damage to the threads of the water outlet
  2. Inspect the water outlet (311) for corrosion or damage.
  3. Repair or replace the engine coolant crossover and/or water outlet, as necessary.