Crankcase-Ventilation/oil separator

Crank Case Ventilation fully explained. (Naturally aspirated edition.)

Mercedes Crankcase Ventilation Oil Separator - Genuine Mercedes 2760107111

BMW Crankcase Vent Valve - OE Supplier 11617501566

Oil Separator, crankcase ventilation - CB0014 ET ENGINETEAM - 059103464B

PCV Valve Engine Crankcase Vent Oil Separator Breather Hose Exhaust Pipe Kit for Audi A3 A4 A5 Q5 TT Beetle CC Jetta GTI - AliExpress

BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.

BMW Crankcase Vent Valve - Febi Bilstein 11617501566

Audi Oil Separator Crankcase Vent Valve 06E103547H

BMW 11 15 7 840 446, Engine Crankcase Vent Valve

Oil Separator, crankcase ventilation FEBI BILSTEIN 176317. Buy online at Cars245

Hose: Crankcase Vent Oil Separator To Intake Manifold For Range Rover

97249745 OE Positive Crankcase Ventilation Oil Separator Drain Hose, 2

Integral part of the crankcase vent system.

Crankcase Vent Valve / Oil Separator - Genuine BMW - E9X M3