Porsche 928S 1983, Руководство пользователя

Страница: 65 / 110

Right-hand drive
Cooling system
The cooling system capacity is approx. 16
liters. The cooling fluid is a mixture of ap-
prox. 8.8 liters softened water and approx.
7.2 liters of cooling fluid additive, and gives
frost protection down to -30° C, as well as
protection against corrosion. For greater
frost protection, see the chapter "Filling
capacities".
Therefore, if the needle on the coolant tempe-
rature gauge moves into the red zone, for ex-
ample when driving fast in very hot weather, it
is advisable to reduce engine speed intermit-
tently.
Left-hand drive
Cooling fan
The cooling fan is driven by a V-belt through a
temperature-controlled, speed-governing
visco-coupling. When the engine is cold, the
fan speed is only a fraction of the engine speed;
when the cooling system is warm, fan speed
is the same as engine speed up to approx.
3500 rpm. The fan speed does not exceed this
value, even at higher engine speeds.
Topping up the coolant
There must always be some coolant in the ex-
pansion tank.
Since the expansion tank is transparent, there
is no need to remove the cap to check the
coolant level.
When cold (approx. 20°C) the coolant should
be up to the level of the joint in the expansion
tank. When the engine is warm, the coolant
level should be above this line.
As engine temperature rises, superfluous
coolant is discharged through the pressure
relief valve in the tank cap.
WARNING: Do not remove the expansion
tank cap when the engine is hot, otherwise
you may be scalded.
To remove the cap proceed in two steps: When
the engine is hot release excess pressure by
turning the cap to the first stop. Protect your
fingers! The cap can then be turned further to
remove it.
When the coolant level drops below a certain
level the central warning light on the instru-
ment panel will light up; the coolant level must
then be topped up.
63