EVIL ENERGY Coolant Reservoir Tank with Cap Compatible With 2012-2018 Focus 2013-2016 Escape 2013-2018 C-Max Replacement for 603-382 8V618K218AC

Q: Which Ford models use this coolant reservoir tank?

A: The coolant reservoir tank fits the 2012–2018 Ford Focus (2.0L gasoline, 2.0L flex-fuel, 1.0L EcoBoost and Focus Electric), the 2013–2018 C-Max Hybrid, the 2013–2017 C-Max Energi, the 2013–2016 Escape with the 1.6L EcoBoost, and the 2014–2016 Transit Connect with the 1.6L EcoBoost. To confirm, compare the number on your old tank with CV6Z8A080A, 8V618K218AC, 8V618K218AD, 8V618K218AE or 603-382.

Q: Does the coolant reservoir tank fit a Focus ST, Focus RS, or an Escape with the 2.0L or 2.5L engine?

A: These versions are not on the fitment list, and some of them use a different tank. Compare the part number molded on your current tank, or send us your VIN before ordering.

Q: My C-Max Hybrid, C-Max Energi or Focus Electric has more than one coolant reservoir. Which one does this tank replace?

A: Ford hybrids and EVs run separate coolant loops, for example one for the engine and another for the inverter or power electronics, and each loop has its own reservoir. Before ordering, match the shape and part number of the tank you are replacing with the product photos and the numbers listed above.

Q: I drive a 1.6L EcoBoost Escape or Transit Connect. Why does the coolant level matter so much on this engine?

A: Ford has recalled 1.6L EcoBoost vehicles because driving with low coolant can make the cylinder head overheat and crack, which can cause an oil leak and, in some cases, an engine fire. Check your vehicle’s recall status by VIN at nhtsa.gov. Some vehicles had a coolant level sensor installed by a dealer under the recall. If yours did, compare your current tank with the product photos and contact us before ordering.

Q: How can I tell the reservoir is the source of my coolant loss?

A: With the engine cold, wipe the tank dry, then check it after a short drive. Fresh wetness or crusty residue along the lower seam, around the hose nipples or under the cap neck points to the reservoir. If the tank stays dry while the level keeps dropping, have a shop pressure-test the hoses, radiator and water pump.

Q: Why does the coolant reservoir tank come with a 21 PSI surge cap?

A: The surge cap is part of the pressure seal of the whole cooling system. An aging cap seal releases pressure early, which lowers the boiling point of the coolant and lets it escape as vapor. Installing a new 145 kPa (21 PSI) cap together with the new tank renews both sealing points at the same time.

Q: What coolant should I use with the new tank?

A: Most 2012 and newer Ford vehicles are factory-filled with Motorcraft Orange, which meets Ford specification WSS-M97B44-D (concentrate) or WSS-M97B44-D2 (prediluted) and is approved for engines and electric motors. Ford also approves Motorcraft Yellow for servicing vehicles originally filled with Orange. Check your owner’s manual to confirm, and don’t mix in other coolant types.

Q: How full should the coolant reservoir tank be?

A: With the engine cold, the coolant should sit between the MIN and MAX marks. When the engine is hot, the level can rise above MAX as the coolant expands, which is normal. Don’t top off past MAX on a cold engine: overfilling is a common mistake, and the extra coolant gets pushed out through the cap.

Q: After installing the tank, the temperature gauge climbs or the heater blows cold. What’s wrong?

A: Air is trapped in the cooling system. Refill the degas bottle, run the engine with the heater on full hot, and let the system go through several heat-up and cool-down cycles, topping the coolant back up to the MAX mark each time it has cooled. If the gauge still climbs once the level is stable, have the thermostat and water pump checked.