We flush the crankcase ventilation system to remove tarry deposits that make it difficult to remove crankcase gases for combustion in the engine cylinders
It is recommended to clean the crankcase ventilation system before each oil change
Preparing the car and removing the decorative engine cover
Loosen the clamp securing the outlet hose of the small branch of the ventilation system to the branch pipe of the cylinder head cover
We squeeze the bent ears of the clamp with pliers, slide the clamp along the hose and disconnect the hose from the pipe
We also disconnect the second end of the hose from the air supply sleeve and remove the hose
Squeezing the bent ears of the clamp with your fingers, disconnect the hose of the large branch of the crankcase ventilation system from the check valve
Disconnect the second end of the hose from the inlet pipe, squeezing the clamp ears with pliers and remove the hose
We unscrew from the cylinder head cover and remove the check valve of the crankcase ventilation system
We wash the hoses and the check valve with gasoline or kerosene, blow it with compressed air
Remove the cylinder head cover as described in the article "How to replace the cover and cylinder head gasket 2AZ-FE Toyota Camry"
We wash the inner surface of the cylinder head cover and its pipe with gasoline or kerosene
Install the cylinder head cover and crankcase ventilation hoses in reverse order