In this video, you will see the exact process for safely draining the engine coolant from a 2011-2018 Ford Focus. Whether you are replacing a leaking thermostat housing, swapping out a water pump, or performing a routine cooling system flush, this step-by-step visual guide shows you exactly where the drain plug is located and how to empty the system without making a massive mess.
How this video helps you: The radiator drain valve (also known as the petcock) is located at the bottom corner of the radiator assembly on the driver’s side. Because it is completely hidden from above by the airbox and engine plastic ducting, and from below by the large lower plastic splash shield, you cannot see it without removing some panels. This video shows you exactly how to remove the plastic fasteners to drop the lower shield, points out the exact position of the plastic thumb-screw petcock, and demonstrates how to loosen it cleanly so the antifreeze streams directly into your catch pan instead of splashing all over the frame rails.
⚠️ CRITICAL SAFETY NOTE: NEVER attempt to open the cooling system or loosen the drain plug while the engine is hot! The cooling system operates under high pressure, and the coolant can be hot enough to cause severe, third-degree burns instantly. Always let the car sit and cool down completely for at least 2 to 3 hours. Verify that the upper radiator hose is completely cool and soft to the touch before opening the reservoir cap or petcock.
Step-by-Step Draining Procedure: To drain the coolant completely and cleanly, follow these essential steps shown in the video:
- Remove the Splash Shield: Use a Torx T30 bit and a plastic trim tool to remove the lower engine splash tray to expose the bottom of the radiator.
- Locate the Petcock: Look at the bottom driver’s side corner of the radiator facing the rear of the vehicle. You will see a small plastic plug with a cross or flat thumb wing slot.
- Position the Drain Pan: Place a clean, wide drain bucket directly beneath the drain port.
- Open the Reservoir Cap: Slowly remove the cap on the coolant expansion tank on the passenger side of the engine bay. This breaks the vacuum seal and allows the fluid to drain much faster and smoother.
- Loosen the Valve: Turn the plastic petcock counterclockwise. Do not use heavy pliers, as the plastic ears snap off easily! If it is stiff, use a wide flat-head screwdriver or coin. Do not pull the plug completely out of the radiator; back it out just enough until a steady stream of fluid begins to flow.
- Refill & Bleed Air: Once the dripping stops, tighten the petcock clockwise until snug. When refilling, always use the factory-recommended Ford Motorcraft orange or yellow extended-life coolant mixed 50/50 with distilled water (never tap water). Fill the reservoir, run the engine with the heater on high, and let the cooling system cycle to purge any trapped air pockets before driving.
Watch the video to see the exact layout under the radiator and get your coolant drained safely and effectively!