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Model specific boards => Golf mk4 => Topic started by: Dave_IOW on 05 January 2014, 22:30

Title: Catch can ventilation
Post by: Dave_IOW on 05 January 2014, 22:30

Can't get my head round this, looking for an explanation for an idiot  :smiley:

Won't venting your catch can to atmosphere just be like having a leak in your PCV system?

Title: Re: Catch can ventilation
Post by: mar_k on 05 January 2014, 22:32

No, Because you plug the tip where the PCV used to return to.

Title: Re: Catch can ventilation
Post by: Wazzzer on 05 January 2014, 22:36

You go closed system or venting, not half way lol

A leak causes unmetered air to enter the mix; if you bung the TIP hole it will just leak or vent and not affect the mix like Mark says

Title: Re: Catch can ventilation
Post by: Dave_IOW on 05 January 2014, 22:38

Right fair enough, with you :afro:

Title: Re: Catch can ventilation
Post by: Dave_IOW on 05 January 2014, 22:41

Edit: Idiot idea, would leave oil on road/track  :laugh:

Title: Re: Catch can ventilation
Post by: Wazzzer on 05 January 2014, 22:53

Indeed, is now deemed illegal too. Gone are the days of heavy breathing Fords and their dodgy crankcase vents

Title: Re: Catch can ventilation
Post by: Dave_IOW on 05 January 2014, 23:01

Quote from: Wazzzer on 05 January 2014, 22:53

Indeed, is now deemed illegal too. Gone are the days of heavy breathing Fords and their dodgy crankcase vents

Illegal as won't pass MOT? Will venting a catch can have the same effect at MOT station? Open breathers?

Title: Re: Catch can ventilation
Post by: northeast_gti-t on 05 January 2014, 23:03

Quote from: Dave_IOW on 05 January 2014, 23:01

Quote from: Wazzzer on 05 January 2014, 22:53

Indeed, is now deemed illegal too. Gone are the days of heavy breathing Fords and their dodgy crankcase vents

Illegal as won't pass MOT? Will venting a catch can have the same effect at MOT station? Open breathers?

i would assume so as its like you say open ventilation and not fully closed system so there would be oily fumes vented

Title: Re: Catch can ventilation
Post by: Wazzzer on 06 January 2014, 10:50

Dunno about MOT mate but it's an environmental thing really as Matt says