Undercoating - Porsche 928 1979 Owner's Manual

Hints for Winter Operation
Engine oil
High quality multi-grade oils are suitable for
all year round driving. Seasonal oil changes
are therefore not necessary. Only if multi-
grade oils are not readily available should
a single-grade oil of the correct viscosity be
used for winter weather driving. Specifica-
tions of the various oils to be used are
detailed under "Filling C a p a c i t i e s " . The use
of oil additives is not recommended
Porsche.
Battery
W h e n outside temperatures fall, the battery's
capacity decreases, but at the same time the
load placed on it increases considerably.
Therefore check the condition of the battery
in time and, if necessary, have it charged.
Check also the level of the electrolyte and
add distilled water if required. Battery ter-
minals should be greased with petroleum
jelly.
Corrosion prevention
The road salts used to keep the roads and
highways free of ice and snow promote cor-
rosion. For this reason, we recommend that
any damage to the factory-applied under-
coating be repaired before the winter. Pro-
tective sprays containing oil should not be
used as they attack both the rubber c o m -
ponents and the protective undercoating.
42
In addition, the body should be coated with
wax for protection, and the chrome ornamen-
tation on the car, including hub caps and
bumpers, with a chrome preservative.
Coolant
For year round driving, the Porsche 928 is
delivered with anti-freeze coolant in the ra-
diator for temperatures down to
- 2 3 ° F / - 3 0 ° C for U.S.A.
- 4 0 ° F / - 4 0 ° C for Canada.
by
Antifreeze consistency
At the beginning of the winter season, have
the coolant checked for antifreeze consist-
ency, particularly if you have added only
clear water before. Use any quality anti-
freeze containing ethylene glycol.
The mixing ratios between water and anti-
freeze depend on outside temperatures to
be expected and are listed under "Capac-
ities". They can also be taken from the c o n -
tainer of the anti-freeze manufacturer.
Washer reservoir
To assure that the windshield washer and
the headlight washer systems also function
at freezing temperatures, antifreeze must be
added to the water beforehand. Follow the
instructions on the can for the right amount
to be used.
Winter tires, snow chains
Winter radial ply tires give good traction in
snow or slush. For a better grip on hard
snow or ice, you can use winter tires with
studs, but check with your local Motor V e -
hicle Bureau for possible restrictions.
Winter tires with studs should be
moderate speed when new to give the studs
time to settle.
Winter tires should always be mounted on
all four wheels. They should also conform to
the same load requirements
equipment tires.
For safety reasons, it is not advisable to
drive with winter tires at prolonged high
speeds. W i n t e r tires do not have the same
degree of traction on dry, w e t or snow-free
roads as regular tires. Winter tires would
wear rapidly under these conditions.
S n o w chains can only be mounted on the
rear wheels. Use only snow chains with fine
pitch links, so that enough space
between the chains and the inside of the
wheel arches.
Wheels must rotate freely in all steering
positions with chains mounted to prevent
damage to body, rear axle or brake compo-
nents. Follow instructions
supplier of the chains. Remove chains
soon as roads are free from snow.
Ski Racks and Roof Racks
Ski racks and roof racks must never be
attached to the drip molding
roof panel. Your authorized Porsche dealer
can assist you in obtaining and installing the
correct equipment.
run at
as original
remains
issued by the
as
around the