BMW E88 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.

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Turner Baffled Oil Catch Can Kit - 6oz
Turner Motorsport
T#: 398782
Mfg#: 022798tms01-05KT
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$46.00 15% off MSRP
$38.95
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ECS Tuning N54 Baffled Oil Catch Can System - E9x, E8x
ECS
T#: 391689
Mfg#: 003779ECS
In Stock
Starting At $195.90
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Angle Connector With Heating Element
Genuine BMW
T#: 388946
Mfg#: 11618638014
Ships on Aug 30, 2018
N54 Baffled Oil Catch Can System - Passenger Side - E9x, E8x
Turner Motorsport
T#: 553501
Mfg#: 022798TMS01-16KT
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N54 Baffled Oil Catch Can System - Driver side - E9x, E8x
Turner Motorsport
T#: 553499
Mfg#: 022798tms01-15KT
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Turner Baffled Oil Catch Can Kit - 8oz
Turner Motorsport
T#: 398784
Mfg#: 022798tms01-07KT
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Turner Baffled Oil Catch Can Kit - 10oz
Turner Motorsport
T#: 398786
Mfg#: 022798tms01-09KT
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