Cooling System – Engine Coolant; The Importance Of Engine Coolant - Ford 2001 Mercury Cougar Owner's Manual

Maintenance and care
Cooling system – engine
coolant
The importance of engine
coolant
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
proper concentration and fluid level
in the coolant reservoir.
Your vehicle was factory filled with
a 50/50 engine coolant and water
concentration. If the concentration
of coolant falls below 40 % or rises
above 60 %, the engine parts could
become damaged or not work
properly. A 50/50 mixture of
coolant and water provides the
following:
• Boiling protection up to 265°F
(129°C).
• Freeze protection down to -34°F
(-36°C).
• Protection against rust and other
forms of corrosion.
• Enables calibrated gauges to
function properly.