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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 674 (Engine Cooling System) >> Repair Instructions >> Draining and Filling Cooling System >> Engine Block Draining

Engine Block Draining

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    Fig 1: Left & Right Engine Block Coolant Drain Plugs
    GM260138Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system, refer to the above procedure.
  2. If equipped with the 4.8L, 5.3L or 6.0L engine, remove the left and right engine block coolant drain plugs.
    3. Fig 2: View Of Engine Coolant Drain Hole Plug
    GM635657Courtesy of GENERAL MOTORS CORP.
  3. If equipped with the 8.1L engine, remove the left and right engine block coolant drain plugs.
  4. Remove the engine block coolant heater, if equipped. Refer to COOLANT HEATER REPLACEMENT (DEALER INSTALLATION - 6.0L Engine)  or Coolant Heater Replacement (4.8L, 5.3L, and 6.0L Engines)  or Coolant Heater Replacement (8.1L Engine) .
  5. Allow the engine block to drain completely.
  6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the drain plugs.
  7. Reinstall the engine block coolant drain plugs.

    Tighten: 

    • Tighten the 4.8L, 5.3L or 6.0L engine block coolant drain plug to 60 N.m (44 lb ft).
    • Tighten the 8.1L engine block coolant drain plug to 60 N.m (44 lb ft).

  8. Install the engine block coolant heater, if equipped. Refer to COOLANT HEATER REPLACEMENT (DEALER INSTALLATION - 6.0L Engine)  or Coolant Heater Replacement (4.8L, 5.3L, and 6.0L Engines)  or Coolant Heater Replacement (8.1L Engine) .
  9. Fill the cooling system, refer to the above procedure.
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