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EC-4
EM
ISSION
CONTROL SYSTEMS
-
Positi
ve Crankcase
Ventilation
(PCVI
Syrtem
POSITIVE CRANKCASE VENTILATION
(PCVI
SYSTEM
--·
....
..
Biow--by
GIS
. . . .
Frfth
A
lr
To
reduc-e HC emission,
cr1nkcase btow·by
gas
(HC•
i.s routed
through
1wo
metering
oriftc•s
to
the
intake manifold
for
combustion
in
the
cylinders
-+--
+-
INSPECTION
OF PCV HOSES AND
CONNECTIONS
1.
VISUALLY INSPECT
HOSES.
CONNECTIONS AND
GASKETS
Check
for
cracks.
leeks
or
damage.
2.
CLEAN
TWO
ORIFICES
Clean
off
any gum
deposits in the
orifices with solvent
and
blow
out
wit
h compressed
air.
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