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Old 04-15-2002, 07:14 PM   #1
PeterJ
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Member#: 14727
Join Date: Jan 2002
Vehicle:
2002 impreza RS

Default breather hoses

As I understand, there are 3 small hoses that connect the crank case to the airbox... Has anyone disconnected these? Two of them blow air and oil particles out, and one sucks clear air in. I have seen those with turbo kits have a tiny air filter on the "clean air"one... What would happen if you connected them all and made a closed loop? ...it would make custom intakes a lot easier. -Thanks
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Old 04-17-2002, 12:07 AM   #2
cammy712
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Member#: 6576
Join Date: May 2001
Location: McMurray, PA, USA
Vehicle:
2001 Impreza 2.5 RST
Black

Default Breathers

I have all three of my breather lines run to smaller individual filters. I know you can get small breather filters from Weapon-R and i have seen cheap ones at pep boys. Doesnt really affect anything except lets the intake use all pure air.
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Old 04-17-2002, 07:16 AM   #3
Joe Alejandro
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Join Date: Aug 2001
Location: School St; Kalihi; Honolulu, HI
Vehicle:
'94 FF 1.8RS
Rally Blue

Default Re: breather hoses

Quote:
Originally posted by PeterJ
As I understand, there are 3 small hoses that connect the crank case to the airbox... Has anyone disconnected these? Two of them blow air and oil particles out, and one sucks clear air in. I have seen those with turbo kits have a tiny air filter on the "clean air"one... What would happen if you connected them all and made a closed loop? ...it would make custom intakes a lot easier. -Thanks
Making a closed loop would choke your enging by keeping crankcase vapors in. Fresh air needs to be recirculated to allow excessive amounts of blow-by gases to flow back through the crankcase vent tube into the intake to be consumed by normal combustion. Joe
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Old 04-18-2002, 09:10 AM   #4
Stealthbmbr
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Join Date: Jan 2002
Chapter/Region: MAIC
Location: Hanover, MD
Vehicle:
2009 Legacy 2.5i SE
C A P S CAPS CAPS CAPS

Default

The pcv valve needs to be connected to a vacumm source, like the intake. All three hoses are connected to the black box, which means there is a vacumm on all three of them. I connected all three together with t fittings and ran them to my new intake. So I have one vacumm source drawing on all three lines at once.
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Old 04-18-2002, 09:18 AM   #5
slater
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1992 vw corrado vr6
silver w/ schrick/quaife

Default

Quote:
The pcv valve needs to be connected to a vacumm source, like the intake.
okay, and if i understand correctly, the PCV valve is on the crankcase breather tube?

would it be REALLY bad if this tube was plugged? if so, what are the side effects?

when i bought my car, the crankcase breather tube was plugged (the tube that runs into the airbox, but not the one that goes in after the throttle body), and that really rubbed me the wrong way. it's not that way anymore, it's running back into the stock airbox.

peter
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