Chevrolet Impala 1969 Owner's Manual page 80

ystems on your vehicle, and the service they require
OPERATION: The Air Injection Reactor system is designed
to reduce air pollution caused by exhaust emissions. It is
entirely separate from the Positive Crankcase Ventilating
system. The Air I njection Reactor system operates by
oxidizing (or burning) the hydrocarbons and carbon man·
oxide as they are expelled from the combustion chamber
into the exhaust. A positive displacement air pump, driven
by the engine, compresses clean filtered air which is
distributed and injected at the exhaust port of each cylin·
der. This fresh air mixes with the hot exhaust gases and
promotes further oxidation (or burning) of both hydro·
carbons and carbon monoxidet by converting some of
them to carbon dioxide and water. The AI R system also
includes a special calibrated carburetor, distributor and
re lated components.
MAINTENANCE: Complete effectiveness of this system is
dependent on proper adjustment of idle speed, ignition
timin g and idle fuel mixture being set according to speci-
fications as indicated on a decal under the hood. These
adjustments should be checked at the first oil change (4
months or 6,000 miles, whichever comes first) . Subse·
quent checks should be made at 12 month or 12,000 mile
intervals, whichever comes first. These adjustments are
also included as part of the quality tune·up recommended
at the same intervals. In addition, all hoses and fittings
should be inspected to make sure they are properly can·
nected, and the drive belt inspected for wear and tension
on the 12·month or 12,000-mile schedule.
t NOTE: See carbon monoxide warning elsewhere in this manual.
*air
injection
reactor (air)
KEY TO A.l.R. SYSTEM
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