In a 2013 Ford Fusion, you add coolant to the expansion (coolant) reservoir in the engine bay, not directly into the radiator. Use a 50/50 mix of coolant and distilled water, and only open the cap when the engine is cold to avoid scalding injuries or pressure release.
Locating the fill point
The coolant expansion reservoir is located in the engine bay, usually on the passenger side near the radiator. It’s a translucent plastic bottle with a screw cap and MIN/MAX level marks on the side, making it easy to see when you need to top up.
To proceed with filling, follow these steps carefully:
- Park on level ground and let the engine cool completely before opening any caps.
- Slowly remove the reservoir cap (or the cap on the expansion tank) once it’s cold to relieve any residual pressure.
- Check the level on the side of the reservoir. If it’s below the MIN mark, add a 50/50 mix of coolant and distilled water up to the MAX mark.
- Replace the cap securely, run the engine to operating temperature, and then recheck the level once the engine has cooled again. Top up if necessary.
Avoid overfilling, and never mix incompatible coolant types. If you’re unsure which coolant to use, consult the owner’s manual or a Ford service professional.
Choosing the right coolant
For the 2013 Fusion, use a coolant that meets Ford’s specification and is compatible with your engine. In most cases, a correct 50/50 mixture of coolant and distilled water is suitable, and you can use pre-mixed 50/50 coolant to simplify the process. Always confirm the exact specification in your owner's manual and avoid mixing different coolant brands or types.
Before adding coolant, confirm you’re using a product labeled as Ford-approved or Ford-compatible to protect the cooling system and prevent corrosion or deposits.
Safety and maintenance considerations
Keep these safety tips in mind to prevent injury and component damage while servicing the cooling system:
- Never open the reservoir or radiator cap when the engine is hot, as pressurized coolant can cause burns.
- Use only the correct coolant type and a proper 50/50 mix unless the manual specifies otherwise.
- Handle coolant with care; it is toxic if ingested and harmful to skin and eyes. Clean spills immediately.
- If you notice persistent low levels, leaks, or overheating, have the system inspected by a professional as soon as possible.
Regular checks of the expansion tank level, along with periodic coolant replacement per Ford’s maintenance schedule, help prevent overheating and extend the life of the cooling system.
What to do if you suspect a problem
If the coolant level drops frequently or you notice white steam, sweet-smelling vapor, or a visible leak, it’s a sign that the cooling system may have an issue such as a hose leak, gasket problem, or water pump failure. In such cases, avoid driving the vehicle long distances and seek professional service to diagnose and repair the underlying cause.
Summary
For a 2013 Ford Fusion, the coolant is added to the expansion reservoir in the engine bay, not into the radiator. Use a 50/50 mix of coolant and distilled water, and always check levels when the engine is cold. Locate the reservoir, remove the cap carefully, top up to the MAX mark if needed, replace the cap, and monitor for leaks or overheating. Use Ford-approved coolant and follow the manual’s specifications to keep the cooling system in good condition.