Fig. 2.348. Location of emission control system components (2.4 l engine): A – crankcase ventilation valve; B – electromagnetic valve for purging the adsorber; C – adsorber; D – Pre-catalytic converter (on the exhaust manifold); E – main catalytic converter (under the floor of the car body); F – EGR valve; G – electromagnetic valve of the exhaust gas recirculation system; H – absolute pressure sensor in the intake manifold (for monitoring the exhaust gas recirculation system)
Fig. 2.349. Components of the toxicity reduction system (2.4 L engine)
Fig. 2.350. Location of emission control system components (2.7 l engine): A – crankcase ventilation valve; B – electromagnetic valve for purging the adsorber; C – Pre-catalytic converter (on the exhaust manifold); D – main catalytic converter (under the floor of the car body); E – adsorber
Fig. 2.351. Components of the toxicity reduction system (2.7 L engine)
Removal
Disconnect the ventilation hose from the positive crankcase ventilation valve. Remove the valve from the cylinder head cover and connect it to the ventilation hose.
Fig. 2.352. Checking the manifold vacuum
Start the engine and let it idle. Close the valve hole with your finger and make sure that you feel a vacuum from the intake manifold (Fig. 2.352).
Note: The plunger inside the PCV valve body should move back and forth.
If there is no vacuum, clean the positive crankcase ventilation valve and ventilation hose in a cleaning solution (solvent) or replace if necessary.
Examination
Remove the positive crankcase ventilation valve.
Fig. 2.353. Checking the plunger mobility
Insert a thin rod into the positive crankcase ventilation valve from the threaded side and check the plunger mobility (Fig. 2.353).
If the plunger is stationary, there are deposits in the positive crankcase ventilation valve. In this case, the valve must be cleaned or replaced.
Installation
Install the positive crankcase ventilation valve in place and tighten it to the specified torque.
Tightening torque of the positive crankcase ventilation valve: 8–12 N·m.