Porsche 928 GT1991, Руководство пользователя

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Undersealing
The underside of your car is durably protected
against chemical and mechanical influences.
As it is not possible to exclude the risk of
damage to this protective coating in day to
day driving, it is advisable to have the under-
side of the car inspected at certain intervals -
preferably before the start of winter and again
in spring - and the undersealing restored as
necessary.
Your authorized Porsche dealer is familiar
with the bodyseal treatment procedures and
has the necessary equipment for applying
factory approved materials. We recommend
that you entrust him with all such work and in-
spections.
Unlike conventional spray oils, undersealing
and rust-proofing compounds based on bitu-
men or wax do not attack the anti-drumming
materials applied at the factory.
Before applying fresh underseal, carefully re-
move deposits of dirt and grease. Once it has
dried, the new undersealing compound forms
a tough protective coating which provides effi-
cient rust-proofing of the floor panels and
components.
Warning
Do not apply any undersealing on or near
exhaust manifold, exhaust pipe, catalytic
converter or heat shields. With the engine
running, the material may overheat and ig-
nite.
Always apply a fresh coating of suitable pre-
servative to unprotected areas after cleaning
the underside of the body or the engine or
carrying out repairs to underbody com-
ponents.
Light lenses and plastics
Use only soap and water solution for cleaning
the plastic light lenses. Never use chemical
cleaning agents for this purpose. The same
applies to other plastic parts and plastic films.
Door, roof and window seals
Rubber seals tend to age and become brittle
or crack if they are not treated occasionally
with glycerine or talcum powder.
Light alloy wheels
Pitting may occur if metallic particles which
cause contact corrosion (e.g. brass or copper
in brake dust) are allowed to remain on the
aluminium for too long.
Regular care is necessary in order to retain
the attractive surface finish. The wheels
should be washed down with a sponge or
wash brush about every two weeks. In areas
where salt is spread on winter roads or there
is a lot of airborne industrial dust, it is best to
clean the wheels weekly.
The Porsche Light Alloy Wheel Cleaner (pH-
value 9.5) can be used for this purpose.
Warning
If the pH-value of the detergent is incor-
rect, the protective coating on the wheels
will be destroyed.
Every three months you should coat the
wheels with a non-corrosive grease (vaseline)
after cleaning. Using a clean cloth thoroughly
rub the grease into the surface.
Warning
Polishes which dissolve oxides, as
frequently used for other metals, or abra-
sive tools or agents are unsuitable be-
cause they break down the oxide film of
the protective coating and will cause dis-
coloration of the wheel.
Leather care
Leather is a natural material. The tanned hide
is a product of nature. The natural surface
markings of leather skins, such as creases,
healed scratches, insect bites, structural
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