pcv valve and bov recic. help. EASY ONE :)

Discuss the RB20, RB25 and RB26 series engines.
dwnshfter
Posts: 199
Joined: Tue Nov 07, 2006 7:27 am
Car: 91 240 rb20

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well i got a pcv valve...question, does it need to go to the turbo inlet pipe, or just have it go to a catch can or a combination of the 2, a catch can and then into the intake pipe. question 2, which way do i want it to go? blow out or blow in? and last but not least, there are 2 plugged holes in my intake tube where things went, is that what they are for? one for bov recir. and the other for pcv valve? thanks in advance!!!


dwnshfter
Posts: 199
Joined: Tue Nov 07, 2006 7:27 am
Car: 91 240 rb20

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the red cap in this pic is one of the 2 i was talking about plugging, the other is right next to it.

Darius
Posts: 4820
Joined: Sun Mar 02, 2003 9:48 am
Car: RB25DET S14 - 665 WHP (SOLD)
Location: Chicagoland

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The red cap is where your BOV originally recirculated to.

If I'm not mistaken, that aluminum block on the front of the intake manifold where the line from the intake valve cover goes, has a PCV valve in it (or check valve of some type)?? Therefore, you shouldn't need an additional PCV valve. The exhaust valve cover line originally went to the other smaller opening on the intake tube. Ideally, you want both valve cover tubes to go into a catch can and then have a line from the catch can to the intake tube (pre-turbo). A lot of people get tripped up because most catch cans only come with two openings so the two valve cover lines need to combine and enter one half and the other side outlets to the intake tube.

dwnshfter
Posts: 199
Joined: Tue Nov 07, 2006 7:27 am
Car: 91 240 rb20

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what do i use for the bov? just rubber radiator hose? and for now should i run a hose to the intake from the valve cover or wait till i get a catch can?

dwnshfter
Posts: 199
Joined: Tue Nov 07, 2006 7:27 am
Car: 91 240 rb20

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ok, i am running a hose straight from the intake to the valve cover. seems to run better, but i still get the cut out at full boost. i cannot get to full boost and it SUCKS! right before it really screams it starts making a poping sound. not high pitched, but like a poof. ok, say you have a NA car and you get air in your lines from changing out a fuel filter, its like that. im going to try and do the BOV recir tomorrow. (i shoulda done it today same time) can i see a pic of one with the BOV recirculated please? not really sure how to run the hose exactly.

User avatar
Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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stock bpv cannot be vented to atmosphere...it will leak and cause all kinds of problems.

dwnshfter
Posts: 199
Joined: Tue Nov 07, 2006 7:27 am
Car: 91 240 rb20

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thats what i kinda figured out. im thinking its leaking at full boost and thats why it sputters. i will try adn get a rubber hose on there tomorrow. now all i need to do is figure out what the hell is up with my starter


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