Manual Saab 9-3 - 2009 (page 271 of 304) (English)

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271Car care

Anti-corrosion

treatment

The entire car undergoes a series of

anti-corrosion processes during production.

These include electrophoretic priming,

PVC-based coating to protect against stone

chip damage and corrosion, and treatment

of body cavities and members with thin,

penetrating rust-proofing oil.

In addition, most body panels, such as the

hood, doors and floor pan are galvanized.

The anti-corrosion treatment on some parts

of the car is constantly exposed to wear and

prone to damage. This applies particularly

to the underside of the car and inside the

wheel arches, where grit, road salt and the

like that are thrown up can give rise to cor-

rosion where the underseal has worn away.

The extent of this obviously depends on the

conditions in which the car is used.

Accordingly, make it a habit to hose the

underside of the car often and to inspect the

condition of the underseal. The anti-corro-

sion warranty does not relieve the car owner

of the need to carry out normal maintenance

to the rust-proofing and to make good any

damage.

Use a hose to clean the underside of the car

thoroughly. After it has dried, use a brush or

spray to apply a viscous anti-corrosion

agent to any worn or damaged areas, to

prevent the onset of corrosion.

Even after the anti-corrosion warranty has

expired, it makes good sense to continue to

maintain the rust-proofing.

Seams in the body, especially those in the

doors and trunk lid, are particularly vulnera-

ble to corrosion from the outside, caused by

grit and salt thrown up from the road, and to

corrosion from the inside, largely as a result

of condensation. Keep the seams clean and

at the first sign of any rust, apply a thin, pen-

etrating, anti-corrosion oil. Your Saab

dealer will be pleased to give you further

advice.

What causes rust?

Steel body panels of automobiles are sub-

ject to rusting whenever air and moisture

manage to penetrate the protective finish.

Body panels may rust through if the process

is unchecked. Rusting can occur wherever

water is trapped or where the car’s panels

are continuously damp.

Damage to paint and undercoating by

stones, gravel and minor crashes immedi-

ately exposes metal to air and moisture.

Road salts used for de-icing will collect on

the bottom of the car and promote rusting.

Areas of the country with high humidity have

a greater potential for rust problems, espe-

cially where salt is used on roads or there is

moist sea air. Industrial pollution (fallout)

may also damage paint and promote rust-

ing.

Preventive maintenance

The following procedures are necessary to

help protect against rusting. Refer also to

the terms and conditions of the Performa-

tion Limited Warranty described in the war-

ranty booklet.

1 Wash the car frequently, and wax at

least twice a year. Under adverse

conditions, where there is a rapid

buildup of dirt, sand or road salt, wash

your car at least once a week. After

extreme exposure to salted snow or

slush, evidenced by a white film on the

car, wash the car immediately. Frequent

93_US_7carcare_MY09.fm Page 271 Tuesday, April 15, 2008 11:26 AM

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Saab 9-3 - 2009 Manual

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