Tools Required
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
J 26568 Coolant and Battery Fluid Tester. See Special Tools .
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.
- Remove the coolant pressure cap.
- Place a drain pan under the drain cock.
- Open the radiator drain cock.
- Drain the cooling system.
- If a complete engine block drain is required LY7 engine, remove the coolant drain plugs. Refer to Engine Block Disassemble in Engine Mechanical - 3.6L.
- Inspect the coolant.
- Follow the appropriate procedure based on the condition of the coolant.
- Normal in appearance-Follow the filling procedure.
- Discolored-Follow the flush procedure. Refer to Flushing .
IMPORTANT:
Draining the cooling system with the pressure cap installed will siphon the coolant from the overflow tank.