Porsche 928 S4 – Owner’s Manual |
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Model Year 1987 From
the “Porsche 928 S4 Owner’s Manual”, available from 928 Specialists. |
Regular and correct care helps to maintain the value of your car and is also a precondition for the Vehicle Warranty and the Anti Corrosion Warranty. The
Porsche paint finish is of a high quality baked synthetic enamel. The color and enamel type designation
are indicated on the “paint number sticker”. When buying touchup paint, always
give the paint and the car’s identification numbers to your dealer. A
well-cared for Porsche can look like new 10 years later. It all depends on the amount of care
the owner is willing to give the car. Your
Porsche dealer has a number of car-care products and can advise you which
ones to use for cleaning the interior and exterior of your car. Whether you use Porsche recommended
products or other commercially available cleaning agents, first make sure of
their correct application. Washing and waxing
The
paint on your Porsche is very durable but must be protected from losing its
luster due to outside influences.
Therefore, wash and was your Porsche often. The longer the dirt is left on the paint, the greater the
risk of damaging the glossy finish, either by scratching if the dirt is
rubbed into the paint, or simply by the chemical effect dirt particles have
on the paint surface. Do not
wash or wax in direct sunlight.
Do not use hot water.
Lukewarm to cool water is kinder to the paint. Pamper
your Porsche! Wash it by
hand! The mechanical brushes in
an Automatic Car Wash may not reach every angle of the vehicle, and some tracks
may cause damage to the underbody. Use
plenty of water, a car-wash and wax solution and a soft sponge or hose
brush. Begin by spraying water
over the dry surface to remove all loose dirt before applying the carwash and
wax solution. Use plenty of
water to rinse the vehicle off.
Wipe everything dry with a chamois to avoid water spots. To
guard against corrosion from the inside out, clean drain holes on the bottom
of doors, tail gates hatches, etc., after each washing. Then wipe dry thoroughly. Also inspect all weatherstrips to
make sure they do not allow water to enter the body panels. Do
not aim water jet directly at door, hatch or rear lid locks. Tape the key holes to prevent water from
seeping into the lock cylinders.
Water in lock cylinders should be removed with compressed air. To prevent locks from freezing in the
winter, squirt glycerine or lock di-icer into the lock cylinders. Do not use any solution that can
damage the body paint. The
underside of the vehicle picks up dirt and road salts used to keep streets
and highways free of snow and ice.
To guard against corrosion, it is important to remove mud, debris and
road salt from the underside with a powerful jet of water. Be sure to include the wheel
housings, bumpers, muffler, tailpipe and brackets. This should be done twice a year and is best accomplished
after the vehicle has been driven through a heavy rain. Let engine and exhaust system cool
down before washing. Waxing
is not really needed when you have used a car-wash and wax solution. If you do not use a car-wash liquid
with wax, apply wax to preserve the natural shine of the body paint. To obtain a long lasting finish,
apply hard wax. Wax again if
water remains on the surface in large patches instead of forming beads and
rolling off. Exterior
Care of the finish Oils
contained in the paint are the most important ingredients contributing to the
elasticity of the finish.
Because these oils gradually diminish, due to weather and similar
causes, they must be replenished through regular and proper care of the
finish. Given proper care, the
original finish will retain its luster for many years. Ask your dealer for approved cleaning
agents and preservatives. The use
of polishes is recommended only after it becomes evident that the normal
preservatives no longer accomplish the job. Dull finishes and plastics Plastic
parts, such as light bulb lenses, decorative stripes, panels, etc., will come
clean during car washing. Should
additional cleaning or spot removal be necessary, use a soft brush or cloth
soaked with a mild detergent solution.
Then rinse thoroughly and immediately with clear water. Do not use anything which
could mar the plastic or full finished surface, such as wax or polish,
abrasive detergents or chemical solvents. Metal trim Bright
or black anodized trim will come clean when you wash the vehicle. To protect the trim, use car wax. Touch-up paint Your
dealer has touch-up paint for minor scratches and stone chips. Scratches should be touched up soon
after they occur, to prevent corrosion.
If corrosion formation becomes visible, however, a simple touch-up job
will not suffice. The affected
surface must be smoothed with sand paper and covered with an anti-rust
primer, before restoring the painted finish. Tar or oil Do
not allow tar or oil to remain on the paint. Remove as soon as possible with a cloth soaked with a
special paint cleaner. If you do
not have a tar or oil remover, you may substitute with turpentine. After applying a cleaning fluid,
always wash with a lukewarm soap water solution and apply a new wax coat. Insects Remove
as soon as possible with a lukewarm soap/water solution or apply insect
remover. Tree sap Remove
with a lukewarm soap/water solution.
Do not allow tree sap or bird droppings to harden on the paint. Windows
Keep silicone sprays off the windshield to avoid wiper smear in rain. Generally,
highway dust that settles on the outside of the windshield contains material
worn from tires and oil residues.
On the inside surfaces of the windshields, particularly in strong
sunlight, there are build-ups of dust from the interior décor. These build-ups are reinforced by
pollution in the air brought in with the fresh air supply. Use a luke-warm soap/water solution
or an alcohol base commercial window cleaning agent for the inside and
outside. If a chamois is used
for polishing the glass, it should exclusively be used for that purpose. To
assure that windshield washers also function at freezing temperatures,
anti-freeze must be added to the washer fluid reservoirs beforehand. It is advisable to use window washer
solvent with anti-freeze all year round. Follow directions on the can for the right amounts to be used. Do not use engine coolant
antifreeze or any other solution that can damage the paint. In
vehicles with Sekuriflex windshields, the plastic coating on the inside of
the windshield must not have gummed labels put on it or be cleaned using abrasive
agents or dry methods. If very
dirty, it can be cleaned with benzine.
The use of benzine in a confined environment may be dangerous to your
health. Make certain that the
plastic coating is not damaged in cleaning by hard objects such as jewelry or
wristwatches. Do not remove ice on the inside of the windshield by any means except warm air from the defroster nozzles. Do not use any de-icer sprays, scratching tools, or scrapers! A
foil base must be applied to the windshield prior to application of any
labels or stickers such as those used for state registration or
inspections. Failure to utilize
foil base between sticker or label and the Sekuriflex coating will result in
damage to the Sekuriflex coating.
Three foil bases were included with the vehicle and additional foil
bases may be ordered from any Porsche dealer. [instructions
for applying foil bases] Wiper blades
Always
loosen frozen wiper blades from glass as they may tear otherwise. Remove
all wiper blades periodically and clean them thoroughly with an alcohol base
cleaning solution. Use a sponge
or soft cloth and wipe lengthwise. Weatherstrips
To
seal properly, weatherstrips around hood, windows, doors, etc. must be
pliable. To retain flexibility
of the rubber, spray with silicone, coat with talcum powder or glycerine to
retain flexibility of the rubber and to protect against freezing in the
winter. Light alloy wheels
To
preserve the decorative appearance of the light aluminum castings, some
special care is necessary. Aside
from road dirt and salt sprays, brake metal dust will exert corrosive
effects. If
left on too long, brake metal dust can cause pitting. Wash the wheels with a sponge or hose
brush every other week. Road
salts should be removed weekly with an acid free cleaning solution. The
acid free cleaning solution must not have a pH value greater than 10
(see explanation), in case of doubt, it is recommended to check with the
manufacturer of that particular cleaner. Every
three months (after regular cleaning) the wheels should be coated with
petroleum jelly. Rub it in
firmly with a soft cloth. Never
use abrasive or metal polishing cleaning agents. Explanation of pH value The
pH value is a measurement for the hydrogen-ion concentration in a
liquid. This value tells if the
liquid reaction is sour (acid) or alkaline (lye solution). At
a pH value of 7, the reaction of the liquid is neutral (that is, chemically
clean water), it is not an acid or alkaline. Acids have a pH value under 7, the strength of the acid
increases with a lower pH value.
Alkaline lies between a pH value of 7 and 14, the strength of the
alkaline increases with higher pH values. For
example: a mineral water mixed with carbon dioxide has a pH value of 6-6.5,
reaction is also light sour. Battery
acid in comparison has a pH value of 1. or the
pH value for normal soap solution is 8-9, but the soap solution for a
dishwasher is approximately 12.5, this would not be suitable for wheel
cleaning. Your
Porsche dealer can advise you which product to use. Remember that moisture and road salt on brakes may affect braking efficiency. Test the brakes after each car or wheel wash. Interior
Glass Use
the same cleaning agents as for the exterior and polish dry with a soft cloth
or paper towel. Fabric Use
a vacuum cleaner or a soft bristle brush to remove dust and loose dirt from
carpeting, upholstery, headliner and other trim. Dirt stains can usually be removed with a lukewarm soap
water or an all purpose cleaner solution. For greasy, oily and other stubborn stains, use a spot
remover. Do not pour the liquid
on the fabric. Dampen a clean
cloth and rub carefully, starting at the edge and working inward. Seat belts Keep
belts clean. Very dirty belts
may not retract properly. Do not
remove belts from the vehicle to be cleaned. Do not use chemical cleaning agents, bleach or
dyes. They contain corrosive
properties which will weaken the webbing. Do not allow inertia reel safety belts to retract before
they are completely dry. For
cleaning, use a mild soap water solution. Let belts dry out thoroughly and away from direct sun
light. Plastic, vinyl and leatherette Use
a clean, damp cloth or sponge to keep this trim free from dust. For other soilage, use a lukewarm all
purpose cleaning solution or a mild saddle soap for vinyl and leather
trim. Remove water spots and
soap traces with a clean, damp cloth or sponge. Use a clean, soft cloth to rub dry. Grease,
tar or oil stains can be removed with a clean cloth or sponge soaked with all
purpose cleaner or with a solvent type vinyl or leather cleaning agent. Occasionally
apply a colorless vinyl or leather preservative to retain the material’s
luster and pliability. Leather and leather trim To
keep leather seats and trim beautiful and soft, they should be cleaned and
cared for regularly. Clean
leather with a soft, white woolen cloth and a mild soap water solution. Do not use chemical or abrasive
cleaning agents. Do not let
moisture seep through perforated surfaces to safeguard against corrosion and
cracking from underneath. After
cleaning, apply a leather preservative recommended by Porsche to all dry
surfaces with a clean and soft woolen cloth. Let your Porsche dealer advise you an the use of the
leather preservation product. The
engine compartment, as well as all engine, transmission, front and rear axle
assembly surfaces have been treated with wax based coating at the factory for
protection against corrosion. WARNING Do not apply additional undercoating or rustproofing on or near the exhaust manifold, exhaust pipes, catalytic converter or heat shields. During driving, the substance used for undercoating could overheat and cause a fire. Engine Compartment If
it becomes necessary to steam clean or otherwise wash the engine compartment,
the wax based protective coating is usually lost. It is, therefore, important to reapply this protective
coating to all engine compartment panels, flanges, cavities, seams and engine
assembly surfaces. When washing the engine compartment, only use commercially available grease cutting solvents made especially for this purpose. Carefully follow directions printed on the container by the manufacturer. Chassis The
lower body shell of your Porsche is thoroughly protected against
corrosion. However, it is
recommended to have the underbody inspected twice a year. Any detected damage to the undercoating,
due to road hazards, should be repaired promptly. Oil based protective sprays must not be applied. Only tar or wax based anti-corrosion
protectors are compatible with the factory applied undercoating. Before application, road dirt and
oily substances must be removed. Whenever the lower body shell, axle, transmission or engine assemblies are repaired, the lost anti-corrosion coating of the affected surface should be renewed. Let
your Porsche dealer advise and assist you. |
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