Ford 2003 Mustang Workshop Manual page 1841

SECTION 303-03A: Engine Cooling
DESCRIPTION AND OPERATION
Engine Cooling
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.
NOTE: The addition of Motorcraft Cooling System Stop Leak Pellets, VC-6, darkens Motorcraft
Premium Gold Engine Coolant from yellow to golden tan.
The 4.6L cooling system components include the:
block heater
engine coolant temperature (ECT) sensor
fan blade, fan motor and fan shroud assembly
radiator
pressure relief cap
radiator draincock
coolant pump
coolant thermostat
oil filter adapter
radiator overflow hose
upper radiator hose
lower radiator hose
The radiator overflow hose circulates the coolant.
The coolant thermostat:
controls the engine coolant temperature.
allows for quicker engine warm-up.
The degas bottle/coolant expansion tank:
provides a location for service fill.
contains coolant expansion and system pressurization.
provides air separation during operation.
replenishes the engine coolant to the system.
The engine coolant flows:
from the lower radiator hose to the coolant pump.
from the coolant pump to the engine block and the cylinder heads.
2003 Mustang Workshop Manual