BMW E39 Crankcase Vent, PCV, and Oil Separator Systems

Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could have rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

For accurate results, specify your model below:

Genuine BMW Crankcase Vent Valve - E36 E39 Z3
Genuine BMW
T#: 337967
Mfg#: 11151703484
In Stock
Sale - Save 14% $100.98
Starting At $86.85
Free Shipping on orders $99 and up
Add to Wish List
Crankcase Ventilation Dipstick Hose
URO
T#: 359570
Mfg#: 11157532629
Ships on Jul 31, 2018
Turner Baffled Oil Catch Can Kit - 8oz
Turner Motorsport
T#: 398784
Mfg#: 022798tms01-07KT
In Stock
Qty
Turner Baffled Oil Catch Can Kit - 6oz
Turner Motorsport
T#: 398782
Mfg#: 022798tms01-05KT
In Stock
Qty
Crankcase Oil Separator Repair Kit - E46 E39 X5
Packaged by Turner
T#: 337996
Mfg#: 11617534237
In Stock
Sale - Save 10% $88.4
Starting At $83.19
Free Shipping on orders $99 and up
Add to Wish List
Turner Baffled Oil Catch Can Kit - 10oz
Turner Motorsport
T#: 398786
Mfg#: 022798tms01-09KT
In Stock
Qty