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Coolant temperature gauge
and warning light
Needle in lower field - engine is cold
As long as needle is in lower field, avoid
high speeds and high engine rpm, until en-
gine has reached normal operating tem-
perature. Do not lug the engine.
Needle in center field - normal
Under normal driving conditions, needle should
remain in center field. The needle may reach
the u p p e r field, especially at h i g h engine loads,
but should return to "normal" when engine
load is reduced.
Needle in upper field - warning
If needle enters the upper field, the engine is
overheating. The central warning light will also
come on. Reduce speed and engine rpm. If
the needle does not return to the center field,
and the central warning light remains on, pull
off the road, turn off the engine and let it cool
down.
Coolant temperature warning light
If the warning light comes on, check that the
fans are working. If the fans are not rotating,
the power supply to the fan control is defec-
tive. The cooling air flaps must be open. If
necessary, open the flaps by hand as de-
scribed in the section "Cooling System".
Allow the engine to cool down and drive to
the nearest authorized workshop, keeping a
constant check on the temperature gauge.
Avoid idling, crawling and engine speeds
over 4000 rpm.
WARNING
• Before you check anything in the engine
compartment, l e t the engine cool down.
Hot components can burn skin on con-
tact.
• The cooling fans are electrically driven.
They are switched on automatically
when the coolant reaches 80° C/176F.
Even when the engine is turned off, the
fans will continue running, until the cool-
ant temperature has dropped to 75° C/
167° F and until the engine itself has
cooled down sufficiently. Therefore,
never touch the fan blades as they will
rotate spontaneously when the thermo-
switch turns the fans on.
• Be careful if you have to remove the cap
from a hot coolant fluid reservoir (ex-
pansion tank). Protect your hands, arms
and face against scalding. Use a thick
rag and open the cap carefully one turn
to allow excess pressure to escape be-
fore removing the cap.
If the electric fans are not working, there may
be a malfunction in the temperature sensor
switch or in the electrical system. Check for a
blown fuse.
If the problem cannot be readily located, be
sure the engine has cooled down sufficiently.
Then drive to the nearest Porsche dealer, but
carefully watch the coolant temperature gauge
and the warning light. Try to avoid engine id-
ling, very low speeds and engine speeds in
excess of 4000 rpm.
For other details refer to "Cooling System".
33
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