2. On 1.6 liter models, the system also includes an oil separator, which is a large plastic casing bolted to the rear wall of the cylinder block...
... and hermetically connected to the crankcase cavity. Sealing of joints is carried out by installing sealing rings. If the oil separator is blocked, try to clean it with a suitable solvent. If flushing does not help, the oil separator must be replaced. The assembly is not subject to disassembly.
3. The system does not need special attention, except for regular checks of the condition and patency of the hoses.