Kmaroman

iTrader: (1)

whats the point of valve covers that have breathers? any horse or they just for look.

Phantom_LS2

iTrader: (3)

I've always wondered as well...

Kmaroman

iTrader: (1)

good cause i didnt wanna look stupid and i've seen them on many apllications

CaribooLou

iTrader: (1)

I think they help the engine reach a pressure equilibrium and essentially serves the same function as a pcv valve. Someone correct me if I am wrong.

97HawkLT1

iTrader: (11)

You are correct. If you were to delete your PCV valve, you would need a breather to vent the crankcase.

caldercay

And in doing so, you contribute to more pollution. The "open" PCV system
consists of breather(s), which expel crankcase vapors into the atmosphere,
whereas a "closed" PCV system, using the one-way PCV (flow control) valve,
routes the crankcase vapors back into the intake manifold, thereby recirculating
those vapors into the combustion chambers.

Never clean and re-install the valve - always replace it.

bricez28

i have a breather. it looks cool

The Engineer

OMG, my LTX race engine is not "green friendly." But, I'm making a lot of HP and getting down the track really fast, so what the hell. Sorry about that Al.

When you're running low-tension rings, you'll need additionaly crankcase breathers, as the factory PCV system can't keep-up at high RPM.

WD

NHRAMAN

iTrader: (1)

YOU ARE A BAD MAN---NOTTA GREENIE...BAD MAN...

hawk584

iTrader: (1)

if we were tree huggers we'd buy a Prius... no sacrifices for power!!! may as well enjoy it and get the most out of these v8's while we still can !!

Speed Density

iTrader: (38)

And WD still has EGR!

Formula413

iTrader: (1)

I thought about getting rid of the PCV system and running a breather, but I don't really think I would gain anything, I just wouldn't have a catch can to empty. There's enough pollution already, it's the least I can do. You're welcome Al Gore.

transamws6_97

iTrader: (5)

so by using breathers you can completely eliminate all the piping for the pcv system?

the_merv

iTrader: (88)

I'm running a Breather as well as a PVC System goin to the Intake.. mine still has alot of Crank Case Pressure.. just the way some Engines are.

The Engineer

OK, but you know first-hand from the shoot-out the air injection system isn't holding me back.

WD

The Engineer

Even with the valve-cover breathers, I would still recommend leaving the PVC valve and tube to pull vapors at low RPMs. Even more so if it is street driven a lot.

WD

TWS

iTrader: (63)

I have a PCV valve AND a Metco breather. It ain't for looks boys, it's to vent crankcase pressure.

C_Rules

iTrader: (7)

Engineer are those samco hoses?? i was thinking of getting them but they say they are only for 95s and up. what year is your car?

buffman

iTrader: (9)

just remember in some cases the PCM can't deal with the extra unmetered air let in by the breathers. The PCM should be able to handle it, but in some cases (mine for example) the PCM doesn't want to compensate for it.

Formula413

iTrader: (1)

That's another thing some people don't realize, if you run a breather while retaining the stock PCV system you are creating a vacuum leak, since unmetered air can enter through the breather and ultimately into the intake manifold.