Two vent pipes in PCV system

Knifeedge2k1 · 12-08-2020, 03:17 AM

https://bimmercat.com/bmw/en/search/...48/ECE/11_6376

https://bimmercat.com/bmw/en/search/...48/ECE/11_6376

It looks like there’s two vent pipes in the PCV system while almost all oil catch cans only intercept/splice one of the paths.

Anyone know what the second smaller vent pipe is for on B48 engines ? (I’ve checked, the N20 only has one vent pipe, seems they made a change on the B-series engines)

Knifeedge2k1 · 12-08-2020, 06:22 AM

Looks like the second line is for fuel breather system

12-08-2020, 03:17 AM	#1
Knifeedge2k1 Second Lieutenant 147 Rep 275 Posts Drives: BMW G30 520i 2019 Join Date: Aug 2020 Location: Hong Kong iTrader: (0)	Two vent pipes in PCV system https://bimmercat.com/bmw/en/search/...48/ECE/11_6376 https://bimmercat.com/bmw/en/search/...48/ECE/11_6376 It looks like there’s two vent pipes in the PCV system while almost all oil catch cans only intercept/splice one of the paths. Anyone know what the second smaller vent pipe is for on B48 engines ? (I’ve checked, the N20 only has one vent pipe, seems they made a change on the B-series engines)
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12-08-2020, 06:22 AM	#2
Knifeedge2k1 Second Lieutenant 147 Rep 275 Posts Drives: BMW G30 520i 2019 Join Date: Aug 2020 Location: Hong Kong iTrader: (0)	Looks like the second line is for fuel breather system
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