Breather Cap Mod
Le Mans Master
Joined: Aug 2000
Posts: 5,294
Likes: 2
From: Suffolk, Long Island NY
Originally Posted by screw991le
Can I ask why you are using a breather cap on a closed loop PCV system?
Race Director
Joined: Sep 2004
Posts: 17,786
Likes: 4
From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Originally Posted by Face
I needed to install one after adding a large cam. I was building a lot of pressure in places where you don't want it!
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Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Its tricky getting off.There's a little tab in there that locks it in.You have to lift or move that tab somehow and twist it off.Maybe someone else will chime in with some idea's.
Thread Starter
Melting Slicks
Joined: Jun 2004
Posts: 2,836
Likes: 110
From: El Paso TX.
well i got it off (that sounds funny) and installed the breather but then the fuel rail cover wouldn't go on! what the ****? should i just return this thin? i already have a catch can, what do guys think?
Drifting
Joined: Jul 2002
Posts: 1,396
Likes: 0
From: new york
I know this may sound stupid but the breather will not fit through the hole on the cover if the breather is already on the valve cover. Put your FRC back on then put the breather on. It sounds like you did the reverse put the breather on first then tried to put the cover on after breather install
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Thread Starter
Melting Slicks
Joined: Jun 2004
Posts: 2,836
Likes: 110
From: El Paso TX.
Originally Posted by quimbo
I know this may sound stupid but the breather will not fit through the hole on the cover if the breather is already on the valve cover. Put your FRC back on then put the breather on. It sounds like you did the reverse put the breather on first then tried to put the cover on after breather install
QUIMBO SEEYAAAH
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Drifting
Joined: Jul 2002
Posts: 1,396
Likes: 0
From: new york
Originally Posted by algZO6
i know that, the breather has no angle to it so it is not centered in the hole.
http://www.thunderracing.com/catalog...&mid=70&sid=91
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Pro
Joined: Oct 2003
Posts: 560
Likes: 0
From: nanticoke pa
breather cap
i have the metco setup mbr0003 and if you use the breather that comes with it the hood wont close right. go to pep boys and buy an edelbrock breather cap it fits perfectly in the metco billet insert and the hood closes. it still hits the hood and will leave a little round mark in your hood insulation but works fine and looks great. brad
Thread Starter
Melting Slicks
Joined: Jun 2004
Posts: 2,836
Likes: 110
From: El Paso TX.
Originally Posted by brad6285
i have the metco setup mbr0003 and if you use the breather that comes with it the hood wont close right. go to pep boys and buy an edelbrock breather cap it fits perfectly in the metco billet insert and the hood closes. it still hits the hood and will leave a little round mark in your hood insulation but works fine and looks great. brad
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
GM has, since 2000, changed the PCV system untill in, 04 there is no PCV "valve" and the system is closed loop.There are now no vents in the rear of the valve covers. With the LS6 valley cover and a catch can the system works pretty well. I just added GM # 12589430 Cap, oil fill -<$10 (vented) which has another use but is a check valve, allowing pressure out but blocking incoming air. If you pry the cap off you can cut down the spring (shown) to lessen relief pressure to open valve and make a cap that fits perfectly and will relieve any momentary block pressure.
