BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks.
Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake.
You should also look into replacing your valve cover gasket when changing the separator.
This Part Fits the Following Vehicles
|BMW||Z3||M Coupe||S52 3.2L|
|BMW||Z3||M Roadster||S52 3.2L|