You add antifreeze to the expansion (coolant) reservoir in the engine bay, using a 50/50 mix of Dex-Cool coolant and distilled water. Do not pour antifreeze directly into the radiator.
In the 2014 Chevrolet Impala, the cooling system is designed with a sealed expansion tank that feeds the radiator as needed. The correct coolant type is Dex-Cool, Chevrolet’s orange, long-life coolant, and it should be mixed in equal parts with distilled water unless you’re using pre-mixed 50/50 Dex-Cool. Always ensure the engine is cool before opening any cap to avoid burns or pressure release.
Locating the coolant reservoir and choosing the right coolant
The coolant reservoir (expansion tank) is located in the engine bay, typically on the passenger side. It’s a translucent plastic container with “MIN” and “MAX” marks and a cap on top labeled for coolant. Use Dex-Cool, which is GM’s orange long-life coolant. You can use pre-mixed 50/50 Dex-Cool or mix Dex-Cool concentrate with distilled water to achieve a 50/50 ratio. Do not mix Dex-Cool with other coolant types unless the label explicitly allows it.
Step-by-step: how to top off the coolant
Before you begin, read this brief guide so you understand the proper process.
- Ensure the engine is completely cool before touching the expansion tank cap. Opening it while hot can cause burns from pressurized coolant.
- Locate the expansion reservoir in the engine bay and check the level against the MIN/MAX indicators on the side of the tank.
- If the level is below the MAX line, slowly add Dex-Cool coolant (or pre-mixed 50/50 Dex-Cool) mixed with distilled water until the level reaches the MAX line.
- Replace the reservoir cap securely and run the engine for a few minutes with the radiator fan cycling. Check for leaks and recheck the level when the engine is cool again.
- If you’ve been adding coolant frequently, there may be a leak or a cooling-system issue that requires professional inspection.
Conclusion: Regularly monitoring the expansion tank level helps maintain proper cooling system function. If you notice persistent drops in coolant level or signs of leaks, have the vehicle inspected by a technician.
Safety and maintenance tips
Never mix Dex-Cool with other, non-compatible coolants unless the manufacturer specifically approves it. Use distilled water for any dilution, not tap water, to prevent mineral buildup. Keep the cap clean and reseal tightly after each check, and dispose of old coolant properly at a recycling facility.
Summary
To add antifreeze to a 2014 Chevy Impala, pour into the expansion reservoir in the engine bay, not directly into the radiator. Use a 50/50 mix of Dex-Cool and distilled water (pre-mixed is fine), and only when the engine is cool. Regular checks of the reservoir level help prevent overheating, and any persistent leaks should be inspected by a professional.