Porsche 92854, Руководство пользователя, Страница: 74 / 145

Cooling system
For year round driving, anti-freeze is added
at the factory for temperatures down to:
-23°F/-30°C for U.S.
-40° F/-40° C for Canada
Because of its anti-corrosion properties, anti-
freeze should also remain in the cooling system
for summer operation. Cooling system capac-
ity and specified anti-freeze and water ratios
are listed under "Filling Capacities".
Use any quality phosphate-free anti-freeze
containing ethylene glycol, available at your
Porsche dealer. Anti-freeze other than spe-
cified by Porsche for aluminium engines
and radiators may cause corrosion of the
cooling system, leading to engine over-
heating and damage.
Only for topping up coolant, a small amount
of anti-freeze containing ethylene glycol and
phosphates may be used if recommended.
The anti-corrosion properties and the anti-
freeze consistency will diminish gradually. We
recommend renewing the coolant mixture at
least every 2 years.
WARNING
The cooling fans are electrically driven.
They are switched on automatically when
the coolant reaches 80° C/176° F. Even
when the engine is turned off, the fan will
continue running, until the coolant tem-
perature has dropped to 75° C/167° F and
until the engine itself has cooled down
sufficiently.
Checking coolant level in expansion tank
A correctly functioning cooling system requires
only minor care. The coolant level should be
checked from time to time, and a l w a y s before
going on a l o n g e r trip.
The expansion tank with filler cap opening
is located in the right rear of the engine com-
partment (see illustration). Since the expan-
sion tank is transparent, it is not necessary
to unscrew the filler cap.
When the engine is cold, the coolant level
should reach the manufacturing seam on the
expansion tank. When the engine is warm, the
coolant level will be above the manufacturing
seam.
Since the closed cooling system loses al-
most no coolant, topping up is normally not
required. An obvious l o s s of c o o l a n t indicates
leakage. In this case contact your dealer.
WARNING
• Do not open the filler cap when the en-
gine is hot because of the danger of
scalding. Allow the engine to cool down.
Protect your hands, arms and face.
• Using a thick rag, open the cap carefully
and only enough to allow excess pres-
sure to escape before removing the cap.
To avoid damage to the engine, only add
cold antifreeze and cold water to the cool-
ing system when the engine is also cold.
A w a r m engine should only b e t o p p e d u p i f the
coolant level has dropped appreciable below
the manufacturing seam. Too much added
coolant will escape through the pressure cap
when coolant warms up.
For more details see "Coolant temperature
gauge and coolant temperature warning light".
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