BMW 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.

Turner Baffled Oil Catch Can Kit - 10oz
Turner Motorsport - Corporate Logo
T#:398786
Part#: 022798TMS01-09KT
In Stock
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$170.95
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Turner Baffled Oil Catch Can Kit - 8oz
Turner Motorsport - Corporate Logo
T#:398784
Part#: 022798TMS01-07KT
In Stock
Sale - Save 10% $189.95
$170.95
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Sale - Save 10% $189.95
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Crankcase Oil Separator Repair Kit - E46 E39 X5
Packaged by Turner - Corporate Logo
T#:337996
Part#: 11617534237
In Stock
Sale - Save 9% $90.38
Starting at $85.30
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Sale - Save 9% $90.38
Starting at $85.30
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Crankcase Vent Hose - E9X 335i /xi, E82 135i, E60 535i/Xi
Genuine BMW - Corporate Logo
T#:11946
Part#: 11157553949
In Stock
17% off MSRP $47.14
$38.95
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17% off MSRP $47.14
$38.95
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ECS Tuning N54 Baffled Oil Catch Can System - E9x, E8x
ECS - Corporate Logo
T#:391689
Part#: 003779ECS
In Stock
Sale - Save 8% $195.90
Starting at $161.46
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Sale - Save 8% $195.90
Starting at $161.46
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N54 Baffled Oil Catch Can System - Passenger Side - E9x, E8x
Turner Motorsport - Corporate Logo
T#:553501
Part#: 022798TMS01-16KT
In Stock
Sale - Save 15% $289.95
$246.46
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Turner F3x N55 Baffled Oil Catch Can System - F30 335i, 335xi
Turner Motorsport - Corporate Logo
T#:557255
Part#: 022515TMS04
In Stock
Sale - Save 15% $289.95
$246.46
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N54 Baffled Oil Catch Can System - Driver side - E9x, E8x
Turner Motorsport - Corporate Logo
T#:553499
Part#: 022798TMS01-15KT
In Stock
Sale - Save 15% $289.95
$246.46
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Crankcase Vent Hose - From Valve Cover to Oil Separator - E36 E39 Z3
Genuine BMW - Corporate Logo
T#:6690
Part#: 11151703775
In Stock
16% off MSRP $41.50
$34.89
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16% off MSRP $41.50
$34.89
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Angle Connector With Heating Element - N52
Genuine BMW - Corporate Logo
T#:388946
Part#: 11618638014
In Stock
13% off MSRP $98.38
$85.99
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13% off MSRP $98.38
$85.99
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Genuine BMW Connecting Line - 11157646086
Genuine BMW - Corporate Logo
T#:174248
Part#: 11157646086
In Stock
19% off MSRP $79.88
$65.02
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19% off MSRP $79.88
$65.02
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N54 Mishimoto Baffled Oil Catch Can
Mishimoto - Corporate Logo
T#:383384
Part#: MMBCCN5406CBE
In Stock
$180.00
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$180.00
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Crankcase Vent Hose - From Valve Cover to Oil Separator  - E46 E39 E60 X3 X5 Z3 Z4
URO - Corporate Logo
T#:2853
Part#: 11611432559
In Stock
$21.95
$11.95
Limited Qty Sale
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$21.95
$11.95
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E82 135i, E9X 335i, E60 535i ECS Baffled Oil Catch Can
ECS - Corporate Logo
T#:388332
Part#: 003779ECS05A0
In Stock
Sale - Save 10% $133.95
Starting at $120.55
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Sale - Save 10% $133.95
Starting at $120.55
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