Here's a general procedure. Consult your owner's manual for the most accurate and specific instructions for your vehicle. These instructions are guidelines and may vary slightly depending on specific engine options.
Tools You'll Need:
* Drain pan: A large capacity drain pan to catch the coolant.
* Wrench: A wrench of the appropriate size to loosen the drain petcock or drain plug (usually a 1/2-inch or 9/16-inch wrench, but check your manual).
* Funnel: To refill the coolant system.
* New coolant: The correct type and amount (refer to your owner's manual). Usually a 50/50 mix of coolant and distilled water.
* Gloves: Protect your hands from the coolant.
* Safety glasses: Protect your eyes from splashes.
Steps:
1. Locate the Drain Petcock/Plug: On the 2001 Impala, the engine block drain plug is typically located at the lowest point of the engine block. The exact location will vary slightly depending on the engine type (3.4L or 3.8L). Consult your owner's manual for the precise location. There may also be a drain on the radiator.
2. Position the Drain Pan: Place the drain pan under the drain petcock/plug.
3. Open the Drain Petcock/Plug: Carefully loosen and remove the drain petcock or plug using the appropriate wrench. The coolant will start to drain immediately. Be prepared for hot coolant if the engine hasn't completely cooled.
4. Drain the Radiator: Once the engine block has drained, locate the radiator drain petcock or plug (usually located at the bottom of the radiator). Place the drain pan under it and open it to drain the remaining coolant from the radiator.
5. Close the Drains: Once the coolant has finished draining, replace and tighten the drain petcock/plug(s).
6. Open the Radiator Cap: Carefully open the radiator cap (after the engine has cooled completely!) to allow air to escape during refilling.
7. Refill the Cooling System: Using a funnel, carefully add the correct type and amount of coolant mixture (50/50 mix of coolant and distilled water is usually recommended). Refer to your owner's manual for the exact capacity.
8. Burp the Cooling System: This is crucial to remove air pockets. Run the engine for a few minutes, then turn it off and check the coolant level. Add more coolant as needed and repeat this process until the system is completely full and free of air bubbles. Check your owner's manual for specific instructions on "burping" the cooling system. Often this involves opening the radiator cap and squeezing hoses to release trapped air.
9. Check for Leaks: After refilling, carefully inspect all connections and hoses for any leaks.
10. Dispose of Old Coolant Properly: Engine coolant is toxic and should be disposed of responsibly at a local auto parts store or recycling center.
Important Considerations:
* Engine Type: The location of drain plugs might slightly differ between the 3.4L and 3.8L engines in the 2001 Impala. Consult your owner's manual for precise locations.
* Coolant Type: Use the correct type of coolant recommended in your owner's manual. Using the wrong coolant can damage your engine.
* Safety: Always prioritize safety. Wear gloves and safety glasses, and work in a well-ventilated area. Let the engine cool completely before starting the draining process.
If you are uncomfortable performing this task yourself, it is always best to take your vehicle to a qualified mechanic. They have the experience and tools to do the job safely and efficiently.
