Pic. 2.348. Location of elements of the toxicity reduction system (2.4L engine): A - valve for forced ventilation of the crankcase; B – canister purge solenoid valve; C - adsorber; D - pre-catalytic converter (on the exhaust manifold); E - main catalytic converter (under the car floor); F - EGR valve; G - solenoid valve of the exhaust gas recirculation system; H - absolute pressure sensor in the intake manifold (for monitoring the exhaust gas recirculation system)
Pic. 2.349. Emission Control System Components (2.4L engine)
Pic. 2.350. Location of elements of the toxicity reduction system (2.7L engine): A - valve for forced ventilation of the crankcase; B – canister purge solenoid valve; C - pre-catalytic converter (on the exhaust manifold); D - main catalytic converter (under the car floor); E - adsorber
Pic. 2.351. Emission Control System Components (2.7L engine)
Withdrawal
Disconnect the vent hose from the positive crankcase ventilation valve. Remove the valve from the cylinder head cover and connect it to the ventilation hose.
Pic. 2.352. Manifold Vacuum Check
Start the engine and let it run at idle. Close the valve opening with your finger and check that you can feel the presence of vacuum from the intake manifold (pic. 2.352).
Note. The plunger inside the PCV valve body must move back and forth.
If vacuum is not felt, then clean the positive crankcase ventilation valve and the ventilation hose in a cleaning solution (solvent) or replace if necessary.
Examination
Remove the crankcase ventilation valve.
Pic. 2.353. Checking plunger mobility
Insert a thin rod into the positive crankcase ventilation valve from the side of the threaded part and check the pliability of the plunger (pic. 2.353).
If the plunger is stationary, there are deposits in the PCV valve. In this case, it is necessary to clean or replace the valve.
Installation
Reinstall the positive crankcase ventilation valve and tighten to specification.
The moment of an inhaling of the valve of compulsory ventilation of a crankcase: 8–12 Н·м.