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Positive Crankcase Ventilation System (P.
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COMBUSTIBLE MIXTURE
• B10W-BY
mm
Certain hydrocarbons in the fuel fail to burn com-
pletely during engine combustion and are discharged
into the engine crankcase. The Positive Crankcase
Ventilation System is nearly 100% effective in burn-
ing these crankcase emissions to help control air
pollution. The P.C.V. System draws air through the
air filter into the left hand rocker arm cover. This
filtered air is routed to the crankcase where it com-
bines with the crankcase emissions. This combusti-
ble mixture then passes through the P.C.V. Valve
and into the combustion chamber where the mixture
is burned.
Air injection Reactor System (A.I.R.)
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PISTOM EXHAUST STSQKI
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Also during the combustion process, certain other
hydrocarbons in the fuel do not ignite completely
and are discharged into the exhaust system. The
A.I.R. System is highly effective in reducing these
undesirable tailpipe emissions, thereby helping com-
bat air pollution. Basically, a pump driven by the
engine injects filtered air into the exhaust manifold.
Here, the filtered air combines with the unburned
hydrocarbons at high temperatures in a chemical
reaction, completing the combustion process and
eliminating large concentrations of tailpipe emissions.
Exhaust System
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The exhaust system for 1989 allows the high per-
formance engine to operate at peak efficiency. The
burned fuel mixture from the engine flows through
the cast iron exhaust manifold into the large diam-
eter steel exhaust pipe. Tha waste gas then passes
through the muffler and resonator before it is dis-
charged to the rear of the car. (See p. F-20 for
Eldorado system.)
F-5
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