Check and replace the positive crankcase ventilation (PCV) valve (every 48,000 km or 3 years) [Toyota Highlander XU20]

1. The valve and hose of the positive crankcase ventilation system are located in the cylinder head cover.

2. Disconnect the hose, tighten the PCV valve from the cap, and then reconnect the hose.

3. With the engine idling at normal operating temperature, place your fingers over the valve opening. If there is no vacuum at the valve, check the hose or valve for blockage. Replace any blocked or damaged hoses.

4. Turn off the engine. Remove the PCV valve from the hose. Blow air through the valve from the cylinder head cover side. If air does not pass through the valve in this direction, replace it with a new one.

5. When purchasing a replacement PCV valve, make sure it is the correct one for your specific vehicle and engine. Compare the old valve with the new one to make sure they are identical.

This material is taken from a resource toyotaman.ru