Mitsubishi 1989 Galant, Service Manual

Page: 634 / 1273

EMISSION CONTROL SYSTEMS
Positive Crankcase Ventilation System
<DOHC>
Name
Symbol
Positive crankcase ventilation valve
A
<SOHC-Up to 1992 models, DOHC>
<SOHC-Up to 1992 models,
CRANKCASE VENTILATION SYSTEM
INSPECTION
(1) Disconnect the ventilation hose from the positive crank-
case ventilation (PCV) valve. Then, remove PCV valve from
the rocker cover and reconnect it to the ventilation hose.
(2) Idle the engine and put a finger to the open end of PCV
valve to make sure that intake manifold vacuum is felt on
the finger.
NOTE
At this time, the plunger inside the PCV valve moves back
and forth.
(3) If vacuum is not felt on finger, clean the PCV valve and ven-
tilation hose in cleaning solvent or replace if necessary.
POSITIVE CRANKCASE VENTILATION
VALVE INSPECTION
(1) Remove the PCV valve.
(2) Insert a thin rod from the side of the PCV valve that is
mounted to the rocker cover. Move the rod back and forth
and confirm that the plunger moves.
(3) If the plunger does not move, the PCV valve is clogged, so
clean or replace it.
INSTALLATION <SOHC-Up to 1992 models, DOHC>
Install PCV valve and tighten to specified torque.
Specified tightening torque: 8-12 (6-8.5
TSB Revision