FORD 2013 C-MAX Hybrid v.2 - Manual (Page 283)

Note: During normal vehicle operation, the coolant may change color
from orange to pink or light red. As long as the coolant is clear and
uncontaminated, this color change does not indicate the coolant has
degraded nor does it require the coolant to be drained, the system to be
flushed, or the coolant to be replaced.
• DO NOT MIX different colors or types of coolant in your vehicle. Make
sure the correct coolant is used. Mixing of coolants may harm your
cooling system. The use of an improper coolant may harm engine,
inverter system controller, and cooling system components and may
void the warranty.
• In case of emergency, a large amount of water without engine coolant
may be added to the engine cooling system only in order to reach a
vehicle service location. In this instance, the engine cooling system
must be drained, chemically cleaned with Motorcraft® Premium
Cooling System Flush, and refilled with prediluted engine coolant as
soon as possible. Water alone (without engine coolant) can cause
engine damage from corrosion, overheating, or freezing. DO NOT use
this method for the inverter system controller cooling system. The
inverter system controller cooling system operates close to ambient
temperature, and is susceptible to freezing in any subfreezing
environment in the absence of coolant.
• Do not use alcohol, methanol, brine or any engine coolants mixed with
alcohol or methanol antifreeze (coolant). Alcohol and other liquids can
cause engine damage from overheating or freezing.
• Do not add extra inhibitors or additives to the coolant. These can be
harmful and compromise the corrosion protection of the coolant.
Adding Engine Coolant
1. Remove the Easy Fuel funnel from the storage compartment. Refer to
Running Out of Fuel for the location of the Easy Fuel funnel.
2. Unscrew the engine coolant reservoir cap slowly. Any pressure will
escape as you unscrew the cap.
3. Position the Easy Fuel funnel in the engine coolant reservoir opening.
Push the Easy Fuel funnel neck fully into the engine coolant reservoir,
past the vent tube, in order to avoid pouring the coolant into the vent
tube and spilling the coolant on the ground.
4. Add prediluted engine coolant to the engine coolant reservoir. Make
sure that the level is between the MIN and MAX marks on the engine
coolant reservoir. Use prediluted engine coolant meeting the Ford
specification. See the technical specifications chart in the Capacities
and Specifications chapter.
282 Maintenance
2013 C-Max Full Hybrid (34h)
Owners Guide gf, 2nd Printing
USA (fus)