Air Injection Reactor System; Engine Oil Filter; Manifold Heat Control Valve; Drive Belts - Chevrolet Impala 1969 Owner's Manual

of the PCV · valve should be made at
the first oil change (4 months or 6,000
miles, whichever occurs first). The
above fuel and electrical system checks
also are included in engine tune-ups
which are recommended at one year
or 12,000-mile intervals.
Air Injection Reactor System
The Air Injection Reactor system
should have the A.I.R. pump drive
belt inspected for wear and tension
every 12 months or 12,000 miles which-
ever occurs first.
Positive Crankcase
Ventilation Valve
Replacement
Crankcase vapors and other impuri-
ties can cause malfunction of the
crankcase ventilation valve. Regular
replacement of the PCV Valve is rec-
ommended at 12-month or 12,000-mile
intervals.
Engine Oil Filter
The engine oil filter should be re-
placed at the first engine oil change
and every second oil change there-
after. This recommendation is based
on the use of an engine oil which meets
the requirements indicated in the sec-
tion on "Engine Oil Recommenda-
tions," and the use of the applicable
AC oil filter. When replacement is
necessary always specify an AC oil
filter.
Manifold Heat Control Valve
Every 6000 miles or 4 months, check
heat control valve for freedom of op-
eration. If shaft is sticking, free it up
with G.M. Manifold Heat Control
Solvent or its equivalent.
Drive Belts
Every 6000 miles-Inspect drive belts
for wear, fraying, cracking, and ten-
sion. Belts which are in poor condition
should be replaced immediately.
Check tension by applying moderate
thumb pressure midway between pul-
leys. If the center to center distance
between pulleys is 13 to 16 inches the
belt should deflect
V2
inch. If the cen-
ter distance is 7 to 10 inches, the belt
should deflect
lf4
inch. Loose belts
should be retensioned to give correct
deflection.
Air Cleaner
Paper Element Type - First 12,000
miles, inspect element for dust leaks,
61
holes or other . damage, replace if
CAUTION: In addition
to
its function of
filtering air drawn into the engine through
the carburetor, the air cleaner also acts
as a flame arrester in . t he event the engine
backfires. Because backfiring . may cause
fire in the engine compartment, the air
cleaner should be installed
at
all times
unless temporary removal
;s
necessary
during repair or maintenance of the
vehicle,
necessary. If satisfactory, rotate ele-
ment 180· from original installed po-
sition. Replace element at 24,000
miles. Element must not be washed,
oiled, tapped or cleaned with an air
hose. If so equipped, replace "Bowtie"
filter every 24,000 miles. .
Flame Arrestor-Every 12,000 miles-
. Clean the arrestor (located in the base
of the air. cleaner) with kerosene or a
suitable solvent. Dry with compressed
air.
For maximum protection specify an
AC Acron air filter element. .
Fuel Filters
. Replace carburetor inlet filter ele-
ment located in carburetor inlet every
12 months or 12,000 miles whichever
occurs first or, if an in-line filter is