Note: Recommended frequency: every 50,000 km or 24 months.
Figure 2.46. Location of the crankcase ventilation valve and hose in the sealing ring on the cylinder head cover on vehicles manufactured before 2001
The crankcase ventilation valve and hose are located in the cylinder head cover. On vehicles produced before 2001, they are installed in the sealing ring on the cylinder head cover (figure 2.46). On cars produced since 2001, they are screwed into the left side of the cylinder head cover (figure 2.47).
Figure 2.47. Location of the crankcase ventilation valve and hose screwed into the cylinder head cover on vehicles produced since 2001
Remove the crankcase ventilation valve. On vehicles manufactured before 2001, pull it out of the sealing ring. On vehicles produced since 2001, remove the hose from the valve, unscrew the valve and put the hose back on it.
Start the engine. At idle speed, use your finger to check for vacuum at the valve. If there is no vacuum, check the valve for proper operation and the condition of the hose. To check the valve, disconnect the hose from it. When blowing through the valve from the side where the valve is attached to the head cover, the valve should pass air freely. When blowing through the valve from the other side, the valve should pass a small amount of air with difficulty. Otherwise, replace the valve.