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John, Buick Master Technician
Category: Buick
Satisfied Customers: 9176
Experience:  ASE A1-A8 w/L1 GM master technician.Factory certified with 40 years experience.
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Engine block coolant drain valve on a 2005 Buick lesabre custom.

Customer Question

Where is the engine block coolant drain valve on a 2005 Buick LeSaber Custom.
Submitted: 6 years ago.
Category: Buick
Expert:  John replied 6 years ago.



There is no engine block drain on a 2005 Buick LeSabre


Here is the radiator drain.


Cooling System Draining and Filling

Tools Required


Draining Procedure

Caution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

    Object Number: 13759  Size: SH

    Important: Draining the cooling system with the pressure cap installed will syphon the coolant from the overflow tank.

  1. Raise and support the vehicle. Place a drain pan under the drain cock.
  2. Open the radiator drain cock.
  3. Drain the cooling system.
  4. Remove the coolant recovery reservoir.
    5.1. Clean the outside of the coolant recovery reservoir.
    5.2. Pour out any fluid.
    5.3. Thoroughly clean the inside of the surge tank using soap and water.
    5.4. Thoroughly flush the coolant recovery reservoir with clean water and drain.
  5. Install the coolant recovery reservoir. Inspect the coolant.
  6. Follow the appropriate procedure based on the condition of the coolant.
    Normal in appearance--Follow the filling procedure.
    Discolored--Follow the flush procedure. .

    Notice: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.

  1. Close the radiator drain cock.
  2. Lower the vehicle.

    Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.

  3. Slowly fill the cooling system with a 50/50 coolant mixture. Install the coolant pressure cap.
  4. Start the engine.
  5. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature.
  6. Allow the engine to idle for 3 minutes.
  7. Shut the engine off.
  8. Allow the engine to cool.
  9. Top off the coolant as necessary.
  10. Inspect the concentration of the engine coolant
  11. Rinse away any excess coolant from the engine and the engine compartment.