Ford 2003 Mustang Workshop Manual page 1854

SECTION 303-03A: Engine Cooling
GENERAL PROCEDURES
Cooling System Draining, Filling and Bleeding
Material
Item
Motorcraft Premium Gold
Engine Coolant
VC-7-A (in Oregon VC-7-B)
(yellow color)
Draining
WARNING: Never remove the pressure relief cap while the engine is operating or when the
cooling system is hot. Failure to follow these instructions can result in damage to the cooling
system or engine or personal injury. To avoid having scalding hot coolant or steam blow out of
the degas bottle when removing the pressure relief cap, wait until the engine is cooled, then
wrap a thick cloth around the pressure relief cap and turn it slowly. Step back while the
pressure is released from the cooling system. When you are sure all the pressure has been
released, turn and remove the pressure relief cap (still with a cloth).
CAUTION: The coolant must be recovered in a suitable, clean container for reuse. If the
coolant is contaminated, it must be recycled or disposed of correctly.
NOTE: Less than 80% of coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty
or contaminated coolant should be drained and filled with new coolant.
1. Release the pressure in the cooling system by slowly turning the pressure relief cap one half
turn counterclockwise or the radiator cap counterclockwise to the first stop. When the pressure
is released, remove the pressure relief cap/radiator cap.
2. Place a suitable container below the radiator draincock. If equipped, disconnect the coolant
return hose at the fluid cooler. Open the draincock and drain the engine coolant.
Close the radiator draincock.
Filling — 3.8L
CAUTION: Vehicle cooling systems are filled with Motorcraft Premium Gold Engine
Coolant VC-7-A (in Oregon VC-7-B) or equivalent meeting Ford specification WSS-M97B51-A1
(yellow color). Always fill the cooling system with the same coolant that is present in the
system. Do not mix coolant types.
CAUTION: Engine coolant provides freeze protection, boil protection, cooling efficiency,
and corrosion protection to the engine and cooling components. In order to obtain these
protections, the engine coolant must be maintained at the correct concentration and fluid level
in the degas bottle.
When adding engine coolant, use a 50/50 mixture of engine coolant and deionized water.
Specification
WSS-M97B51-
A1
2003 Mustang Workshop Manual