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LUBRICATION AND MAINTENANCE
0 - 1 7
HOLD DOWN NUT
AIR CLEANER
ASSEMBLY
PIVOT AREAS
RROOD26
Fig. 3 Engine
Air Cleaner
Assembly
(Typical)
PAPER ELEMENT
IF THE PAPER AIR CLEANER
ELEMENT IS SATURATED WITH \
OIL, IT MUST BE REPLACED
AND PCV SYSTEM TESTED
RR00D24
Fig. 4 Cleaning
Filter Element
(Typical)
MANIFOLD HEAT CONTROL VALVE
O n t h e L E F T H A N D manifold, test the manifold
heat control v a l v e for free operation. W i t h the engine
i d l i n g , accelerate m o m e n t a r i l y . T h e counterweight
should move C L O C K W I S E . I f no movement is ob-
served, shaft i s b i n d i n g or t h e thermostat spring is
weak or broken. Be sure manifold is COOL before
a p p l y i n g M O P A R M a n i f o l d Heat Control Valve Sol-
vent, or equivalent, to each end of t h e shaft a t t h e
bearings (Fig. 6). A l l o w t h e solvent to soak a few
minutes to dissolve deposits. Then, w o r k t h e valve
back and f o r t h u n t i l i t t u r n s freely. I f the spring is
weak or broken, replace t h e spring.
FRONT
RN965
Fig. 5 Accelerator
Linkage
Pivot
Areas
Fig. 6 Manifold
Heat Control
Valve
AIR INJECTION SYSTEM
A l l valves and switches i n t h e A i r Injection System
and the a i r p u m p should be checked for proper oper-
ation a n d replaced, i f necessary. Inspect t h e check
valve t u b i n g for corrosion a n d replace, i f excessive
corrosion is evident.
CRANKCASE VENTILATION SYSTEM
A l l
models w i t h gasoline operated engines are
equipped w i t h a closed crankcase v e n t i l a t i o n system
designed t o e l i m i n a t e emission o f residual fumes and
vapors f r o m t h e crankcase b y directing these fumes
back t h r o u g h t h e engine combustion chambers.
VENTILATION
SYSTEM
OPERATION
The v e n t i l a t i o n system operates by m a n i f o l d vac-
u u m . A i r is d r a w n from t h e a i r cleaner, t h r o u g h t h e
crankcase i n l e t a i r cleaner. T h e n the a i r is circulated
t h r o u g h t h e engine and d r a w n out t h r o u g h t h e P C V
valve, a n d i n t o a passage i n the t h r o t t l e body, becom-
i n g p a r t o f t h e calibrated air/fuel m i x t u r e ( F i g . 7).
This m i x t u r e is d r a w n i n t o t h e combustion chamber
and burned.
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