Porsche 928 GTS 1994 Owner's Manual page 82

When washing by hand, use abundant water, a
soft sponge or wash brush, and the Porsche car
shampoo. Begin by spraying
thoroughly with water to rinse away loose dirt.
Do not wash your car in bright sunlight or while
the bodywork is still hot. After washing, rinse the
car with plenty of water and then dry with a
chamois leather.
Do not use the same chamois leather for drying
as you use for cleaning the windshield and win-
dows.
The moisture which gets on to the brakes during
a car wash can reduce braking efficiency or
make the brakes pull unevenly. Always apply the
brakes a few times after washing the car to test
braking efficiency and dry the brake discs.
Dust should never be wiped off the car with a
dry cloth since dust particles are abrasive and
could dull and damage the surface finish.
Preservation
The paintwork contains certain oils which main-
tain its high luster and prevent it from becoming
brittle. Climatic influences can remove these oils
from the paintwork. This should be counteracted
by applying a paint preservative early enough to
restore the oils preserving the high luster and
preventing dirt from settling on the surface and
industrial dust penetrating the paint.
Provided it is washed and treated with preserv-
ative regularly, the brand new finish of your car
the body
will be retained for years to come.
Apply the Porsche paint preservative after the
car wash and polish it dry to obtain a bright fin-
ish or simply add the Porsche liquid preservative
regularly to the final rinse water and rub down
with a leather chamois.
Cleaning and preserving engine
compartment
The engine compartment and the surface of the
engine are treated with a corrosion-inhibitor at
the factory.
If degreasing solvents are used to clean the en-
gine compartment or the engine is washed
down, the process almost invariably removes
the corrosion-inhibiting coating. It is then abso-
lutely necessary to have a durable preservative
applied to all surfaces, body seams, joints and
assemblies in the engine compartment. This also
applies when corrosion-inhibited parts are re-
placed.
Effective rust-proofing is particularly important
during the cold weather season. If your car is
driven frequently in areas where salt has been
spread on the roads, the whole engine compart-
ment should be cleaned thoroughly after the
winter to prevent salt causing any lasting dam-
age. A full underbody wash should also be per-
formed at the same time.
Windows
The road dust which settles on the windshield
and windows contains particles of tire rubber
and oil residue. The interior trim and upholstery
release particles, particularly in strong sunlight,
which collect on the insides of the windows.
These deposits are augmented by impurities in
the air which enters the car through the fresh air
vents.
The Porsche spray-on window cleaner can be
used to clean the windows, both inside and out-
side. Remember to clean the wiper blades as
well and replace them once or twice every year,
depending on condition. If you use a chamois
leather for the windows, do not use it for the
paintwork as it will otherwise pick up a certain
amount of preservative or polish and could
smear the windows and thus impair vision.
Remove dead insects with the Porsche insect re-
mover.
Polishing
Do not resort to using Porsche polish until it be-
comes evident that the normal preservatives no
longer produce the desired finish.
83