Porsche 928 S 1984, Руководство пользователя

Страница: 71 / 109

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 filler mark on the expansion
tank. When the engine is warm, the coolant
level will be above the filler mark.
Since the closed cooling system loses almost
no coolant, topping up is normally not re-
quired. An obvious loss of coolant 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 scald-
ing. Allow the engine to cool down. Pro-
tect your hands, arms and face. Open the
filler cap to the first catch to allow pressure
to escape before removing the cap.
For more details see "Coolant temperature
gauge and coolant temperature warning light".
To avoid damage to the engine, only add cold
anti-freeze and cold water to the cooling sys-
tem when the engine is also cold.
A warm engine should only be topped up if the
coolant level has dropped appreciably below
the filler mark. Too much added coolant will
escape through the pressure cap when cool-
ant warms up.
Bleeding cooling system
If more than about 1.1 U. S. qt. or 1 liter must be
added, the cooling system should be bled.
1. Move the temperature control lever (upper
lever) in the center console all the way to
the right.
2. Start the engine and allow it to run at in-
creased idle for about one minute.
3. Turn the engine off.
4. Recheck the coolant level and add as ne-
cessary.
Winter operation
At the beginning of the winter season, have
the coolant checked for anti-freeze concen-
tration.
For anti-freeze/water mixing ratios and
cooling system capacity, see "Filling Capac-
ities".
Increasing the anti-freeze in the coolant
further than shown on the container is not
only uneconomical, it is also detrimental
to engine cooling.
68