Volvo 940 - Manual (Page 159)

1993 Volvo 940
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Industrial pollution and the presence of salt will also accelerate the deterioration of paint finishes.
The foregoing identifies the need for every car owner to keep his or her car-particularly the underside-as
clean and dry as possible and to repair any minor damage to paintwork and protective coating as soon as
possible.
The need is more important in those areas where road salt is used for de-icing, the relative humidity is
higher, air pollution is present, and temperatures regularly stay above freezing.
Rustproofing, inspection and touching-up
Your Volvo was carefully and thoroughly rustproofed at the factory.
The underbody and wheelhousings were sprayed with a thick, durable rustproofing compound and the
beams, internal cavities and end sections were sprayed with a low viscous, penetrating rustproofing
agent.
There are two very effective methods of maintaining this protection:
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Keep your car clean.
Clean the underbody, wheelhousings and the edges of the fenders using water at high pressure.
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Inspect and touch-up the rustproofing if necessary.
The invisible (internal) rustproofing
As part of your maintenance schedule, it is important that the invisible rustproofing (used for beams,
internal cavities and end sections) be retreated first after 36 months and, thereafter, every 24 months.
Bear in mind, if good results are to be obtained, that these sections must be treated with a fine spray of
Volvo-approved rustproofing compound by your authorized Volvo dealer.
pg. 7:3 Rustproofing
The visible rustproofing
The visible (external) rustproofing must be inspected by an authorized Volvo dealer at 20,000 mile
(32,000 km) intervals. If it is necessary to touch-up the rustproofing, this should be done immediately to
prevent moisture penetration. Wash and dry thoroughly before touching up. Use spray-on or brush-on
rustproofing compounds.
There are two different types of rustproofing compounds available:
a. thin (transparent) for visible parts.
b. thick, for parts on the underbody and wheel housing which experience most wear.
Parts of the car which may need to be touched up and the recommended rustproofing compound are:
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visible welded seams and panel seams-(thin)
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underbody and wheel housings-(thick)
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door hinges-(thin)
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