Cleaning the crankcase ventilation system

Over time, tar deposits from crankcase gases accumulate in the crankcase ventilation system of the engine, making it difficult to remove these gases into the engine cylinders for combustion. Because of this, the pressure of the gases inside the engine rises and oil leaks through the seals. To avoid this, periodically clean and flush the system.

You will need a flat blade screwdriver.

TIP: Clean the crankcase ventilation system before every oil change.

1. Remove the air filter cover..



2.... and remove the filter element (cm. «Checking and replacing the air filter element»).



3. Remove the crankcase ventilation filter from the groove in the air filter housing.

NOTE: Replace a heavily soiled filter with a new one.

4. Remove the crankcase ventilation pipe from the holder on the inlet pipe.



5. Disconnect the tube of the crankcase ventilation system from the connecting hose..



6.... and remove the hose.




7. Raise the air filter housing by pulling it up, overcoming the force of the rubber bushings..



8.... and disconnect the crankcase ventilation tube from it by squeezing the locking ring.



9. Remove the crankcase ventilation tube.

10. Remove the cylinder head cover (see «Engine cylinder head cover gasket replacement»).

GOOD ADVICE: Replace the gasket with a new one every time you remove the cylinder head cover.

11. Wash the oil deflectors, the inner surface of the cylinder head cover and its branch pipe with gasoline or kerosene.

12. Establish a cover of a head of the block of cylinders and hoses of system of ventilation of a crankcase in an order, the return to removal.