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leaks, holes or other damage,
replace
if
necessary.
If condition is
satisfactory,
rotate
element
180
0
from
originally installed position.
Replace
at
24,000
miles.
Oil Welted
Paper Element with
Polyurethane
Wrap: This dual
element air cleaner has extremely
long life
and will
not
require replacement for
50,000 to 100,000 miles under normal
operating
conditions.
Cleaning
and oiling
of the polyurethane
wrap
should
be done
at
24,000 miles
under
normal high-
way or city-type
operation. Service under
ofl'-the-
road
or extremely
dusty
operations should
be per-
formed at
12,000 miles
or
less
depending
upon
severity of operating conditions.
To clean: Remove polyurethane
wrap from
paper
element, wash
in
suitable solvent
to
remove
oil
and
dirt.
Squeeze dry,
dip in engine oil and
squeeze
to
remove excess oil
(never
shake or
wring-always squeeze). Wrap element in clean
dry cloth
and squeeze out any remaining oil.
CLOSED POSITIVE CRANKCASE
VENTILATION (PCV) SYSTEM
Every 12
months or
12,000
miles, whichever
occurs first
,
the P.C.V.
valve should be replaced.
Also,
all
hoses
and fittings
should be
inspected,
cleaned and
replaced,
if necessary. At replace-
ment time,
specify an AC-PCV valve.
•
45
•
AIR INJECTION REACTOR SYSTEM
The Air
Injector
Reactor
system
should have
the A.I.R. pump drive belt inspected for
wear
and tension every 12 months or 12,000 miles,
whichever occurs
first.
MANIFOLD HEAT CONTROL VALVE
Check manifold heat control
valve
for freedom
of operation.
If shaft is sticking,
free
it
up
with
GM Manifold
Heat
Control Solvent.
ENGINE TUNE·UP, EMISSION CONTROL
AND
ELECTRICAL SYSTEM CHECKS
Fuel and
electrical
systems are
subject
to wear
and
contamination and require periodic cleaning
and
adjustments to maintain maximum economy
and
performance. Proper
adjustment of
engine
idle
speed,
idle fuel mixture, ignition
timing and
operation
of the Positive Crankcase Ventilation
valve (PCV) are important
to
control hydro-carbon
and
CO
emissions
within
government legislated
levels. These
adjustments and
an
operational
check
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,OOO-mile intervals.
ELECTRICAL SYSTEM
CAUTION:
It is the owner's responsibility
to
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