1.3L engine
Remove the oil filler cap from the valve cover.
Check gasket for damage.
Check the tightness of the engine ventilation hoses on the cover, to do this, slightly pull the hoses. Replace damaged hoses.
If contamination is found in the lid (gumming), then the cap must be washed in gasoline.
Precautions: do not use fire and do not smoke! Prepare a fire extinguisher! Ensure good ventilation and wear protective goggles.
Attention: Do not pour dirty gasoline into the sewer.
Put on the oil filler cap.
Take a test drive and check the tightness of the cover.