Finding the Coolant Location in a 2017 Ford Fusion Hybrid: A Step-by-Step Guide

By Nick Marchenko, PhD

Understanding the Basics

Under Hood Overview

Before diving into the coolant system, let's understand what's under the hood of a 2017 Ford Fusion Hybrid:

• Engine Coolant Reservoir (A): This is where you'll check and add coolant.
• Inverter System Controller Coolant Reservoir (G): Specific to the hybrid system, it operates at a lower temperature.
• Other Components: These include the engine oil filler cap, air filter, brake fluid reservoir, and more.

Warnings and Notes

• High Voltage Warning: The inverter system controller houses high-voltage components. It's crucial to avoid tampering with it.
• Coolant Warnings: Never open the coolant reservoir when the engine is hot. Avoid mixing different coolants and don't substitute with other fluids.

Engine Coolant Check

Checking the coolant involves several steps and precautions:

Safety First

• Wait for the Engine to Cool: This is critical to prevent injuries.
• Use Caution: Cover the coolant cap with a cloth while opening it to avoid scalding.

Checking the Coolant

• Level and Concentration: Ensure the level is between the MIN and MAX marks. The coolant should have a concentration between 48% to 50%.
• Adding Coolant: Use only prediluted coolant approved for your vehicle. If the level is below MIN, add the coolant slowly, then reseal the cap securely.

Adding Coolant: Step-by-Step

1. Cool Down: Ensure the engine and cooling system are not hot.
2. Open the Cap: Unscrew it slowly to release any pressure.
3. Add Coolant: Pour the approved prediluted coolant up to the correct level.
4. Reseal: Tighten the cap back in place.
5. Post-Check: Monitor the coolant level over the next few drives.

Maintenance Tips

• Regular Checks: Do this as per the scheduled maintenance.
• Avoid Additives: They can damage the cooling system.
• Emergency Measures: In dire situations, water can be used temporarily, but ensure to visit a service center immediately afterward.

Understanding Fail-Safe Cooling

The 2017 Ford Fusion Hybrid comes with a fail-safe cooling feature. It allows limited driving to prevent engine damage under certain conditions.

When Fail-Safe Mode Activates

• Limited Power: The vehicle operates with reduced engine power.
• Immediate Actions: If in fail-safe mode, stop as soon as possible and check the coolant level.

Severe Climate Considerations

• Cold Climates: Increase the coolant concentration above 50%.
• Hot Climates: A lower concentration, around 40%, might be necessary.

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Coolant Change and Disposal

• Scheduled Changes: Follow the vehicle's maintenance guide.
• Proper Disposal: Dispose of the used coolant responsibly, adhering to local regulations.

Conclusion

Maintaining the coolant in a 2017 Ford Fusion Hybrid is essential for the vehicle's health. Regular checks and using the right coolant are key. And always remember, when in doubt, consult a professional!

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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