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. Therefore, periodically clean and flush the system.

You will need pliers.

Helpful Hint: Clean the crankcase ventilation system before every oil change.

1. Squeeze the bent antennae of the clamp that secures the outlet hose of the system to the fitting of the air inlet hose, slide the clamp along the hose...



2.... and disconnect the hose from the sleeve.



3. Squeeze the bent antennae of the clamp that secures the outlet hose of the system to the branch pipe of the cylinder head cover, slide the clamp along the hose...




4.... disconnect the hose from the nozzle...



5.... and remove the outlet hose of the large branch of the crankcase ventilation system.



6. Similarly remove a hose of a small branch of system of ventilation of a crankcase of the engine.



7. Remove the cylinder head cover (see «Replacing the cylinder head cover gasket»).

Helpful Hint: Every time you remove the cylinder head cover, replace the gasket with a new one.

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

9. Install the cylinder head cover and crankcase ventilation hoses in the reverse order of removal.