1. The crankcase ventilation system directs gases that have broken through from the combustion chambers into the engine crankcase through a valve into the intake manifold so that they can again enter the cylinders and burn there in the normal way. The system consists of a hose connecting the valve body to the intake manifold and a hose connecting the air cleaner to the valve cover.
2. The ventilation valve is located in the valve cover (figure 21.2).
3. With the engine warm and idling, pull the valve and hose off the valve cover.
4. Close the valve or hose opening with your finger (figure 21.4). If your finger does not feel a vacuum, check to see if the hose, manifold inlet, or valve is clogged. Replace the clogged hose.
(Based on website data: MAZBOOK.ru)
5. Turn off the engine and shake the valve - it should make a knocking sound. If there is no knocking, then the valve is faulty and needs to be replaced.
6. To replace the valve, simply pull it out of the hose (remember which side the ohm was inserted).
7. When purchasing a new valve, make sure it is suitable for your engine. Compare the new valve to the old one to make sure they are the same.
8. Insert the valve into the hose,
9. Check rubber hoses and bushings for damage and hardening. Replace them if necessary,
10. Replace the valve with the hose. More details about the crankcase ventilation system see chapter 6.