Cooling System - Porsche 928 1979 Owner's Manual

Windshield/headlight washer
reservoir
The transparent fluid reservoir is located in
the right rear of the engine compartment, in
front of the expansion tank (see illustration).
Clear water is normally not adequate to keep
your windshield and headlights clean. A d d a
solution, such as windshield washer solvent
and antifreeze offered by your dealer.

Cooling system

For year round driving, antifreeze is added
at the factory for temperatures down to:
- 2 3 ° F / - 3 0 ° C for U.S.A.
_ 4 0 ° F / - 4 0 ° C for Canada
Because of its anti-corrosion properties, anti-
freeze should also remain in the cooling sys-
tem for summer operation.. Cooling system
capacity and specified antifreeze and water
ratios are listed under "Filling capacities".
Only use additives recommended for alumi-
num engines and radiators. Your Porsche
dealer will be able to advise you.
The anti-corrosion properties and the anti-
freeze consistency will diminish
We recommend renewing the coolant mix-
ture at lease every 2 years.
Warning: The radiator fan
driven. It is switched on automatically by a
thermostat when the coolant reaches 92° C/
198° F. Even when the engine is turned off,
the fan will continue running, until the cool-
ant temperature has dropped
189° F and until the engine itself has cooled
down sufficiently.
See also "Cautions" on page 46.
Checking coolant level in expansion tank
A correctly functioning cooling system re-
quires only minor care. The coolant level
should be checked from time to time, and
always before going on a longer trip.
The expansion tank with filler cap opening is
located in the right rear of the engine c o m -
partment (see illustration). Since the expan-
sion tank is transparent, it is not necessary
to unscrew the filler cap.
When the engine is c o l d , the coolant level
should reach
pansion tank. When the engine is warm, the
coolant level will be above the filler mark.
Since the closed cooling system loses a l -
gradually.
most no coolant, topping up is normally not
required. An obvious loss of coolant indi-
cates leakage.
dealer.
is electrically
Warning: Do not open the filler cap when
the engine is hot because of the danger of
to 8 7 ° C/
scalding. Allow the engine to cool down.
Protect your hands, arms and face. Open
the filler cap to the first catch to allow ex-
cess pressure to escape before removing
the cap.
the filler mark on the ex-
In this case contact your
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