Crankcase Emission Control System - Mitsubishi 3000GT 1994 Workshop Manual

17-8
EMISSION CONTROL
-
Service
Adjustment
Procedures
CRANKCASE EMISSION CONTROL SYSTEM
Ventilation hose
Positive
crankcase
ventilation
valve
Breather
hose
zEMO258
POSMVE
CRANKCASE
VENNLANON
SYSTEM
Sydcm
Inrpcction
(1)
Remove
the ventilation hose from the positive
crankcase
ventilation
valve.
(2)
Remove
the
positive crankcase ventilation valve from the
rocker
cover.
(3)
Reinstall
the
positive crankcase ventilation valve
at
the
ventilation
hose.
(4).Start
the
engine and run
at
idle.
(5)
Place
a finger at the opening of the
positive
crankcase
ventilation valve and confirm that negative pressure of the
intake manifold
is
felt.
Iilfir
moment,
the ptunger in the positive crankcase
O
ventilation valve moves forward and
backward.
(6) lf
negative pressure is not felt,
clean
the positive
crank-
case ventilation valve
or
replace
it.
(7) Tighten
the
positive crankcase ventilation valve with the
specified
torque.
//
Tlghtenlng torque: 10 Nm (1.0 kgm, 7.2 ft.lbs.l
Poritlve
Grankcarc
Vertllation
IPCVI
Valve
Inspection
(1)
Slide in a narrow stick at the threaded side of the positive
crankcase ventilation valve and make sure that the plunger
moves.
(2)
lf the
plunger does
not
move, there is a clogging in the
positive crankcase ventilation valve. In this case, clean or
replace
the
valve.
@
lvlit|l|bbhi Motor!
Corporation
May
1992 FWUEgl19