User Manual - Page 206

For 2000 MERCURY COUGAR.

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Maintenance
and care
206
1. Before you begin, turn the
engine off and let it cool.
2. When the engine is cool, wrap a
thick cloth around the coolant
pressure relief cap on the coolant
reservoir (an opaque plastic
bottle). Slowly turn the cap
counterclockwise (left) until the
pressure begins to release.
3. Step back while the pressure
releases (you may hear a hissing
sound).
4. When you are sure that all the
pressure has been released from
the cooling system, use the cloth to
turn the cap counterclockwise and
remove it.
5. Fill the coolant reservoir slowly
with the proper coolant mixture
(see above) to the MAX line on the
reservoir.
6. Replace the cap. Turn until
tightly installed. (Cap must be
tightly installed to prevent coolant
loss.)
After any coolant has been added,
check the coolant concentration
(see Checking engine coolant
section). If the concentration is not
50/50 (protection to -34°F /-36°C),
drain some coolant and adjust the
concentration. It may take several
drains and additions to obtain a
50/50 coolant concentration.
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