Adrenolin

My understanding is that I should go with a PCV setup on our engine build from reading through some posts here.

Doesn't really matter which side to me but I figured the Breather on the front drivers side and the PCV Valve on the rear passengers side. This way the hose would be hidden under the oval air cleaner.


1. Does it matter which valve cover has the PCV Valve and which has a Breather? Edelbrock places the 3/8" PCV port in the front.
2. Does it matter if I install the Breather or not? I believe I rear it was best to have an 'open' system with a breather then to close it off or to run 2 PCV valves.
3. What is a Breather 'Tube'? I've seen it as an option on valve cover breathers and unsure what its for. I'll assume its not the same as a PCV.


Summit PCV Valve
Cobra Valve Covers (Baffled)
K&N Valve Cover Breather
Edelbrock Thunder AVS 650 Carb

Anything else I need to consider here?

tx65coupe

The 302 in my 65 has the breather on the front driver side and the PCV on the rear passenger side. I think this is how almost all of them are setup.

Also, you need to make sure to run a PCV valve. It is intended to be used that way. I'm not sure why you would have considered not running a PCV.

Adrenolin

Thanks for the reply..

Its not that I considered not running a PCV valve... It's that I've never built an engine before so I have questions. Hence why I did a couple searches, read a few good posts, (Urban_Cowboy has a few great posts), and why I asked the questions above.

fakesnakes

You can run the pcv in either cover and do not use two (one sucks while the other blows). Either put a breather in the other cover or run it up to the air cleaner (any oil spray is eliminated this way).

Starfury

Urban has a unique setup because of his monster motor. You shouldn't need anything that serious. A PCV valve in one valve cover and a breather in the other is fine. To properly meet closed-emissions spec, the breather should be connected to the air cleaner via an oil-resistant hose, although most people simply use an open breather cap with a filter in it.

Adrenolin

OK great and thanks. I just wanted to make sure I understood this correctly and before I placed an order.

pootypeters

So a PCV valve is meant to route the unburnt hydrocarbons from your valve covers to the carb to be recirculated again right?.... So I have a PCV valve hooked up on my passenger side and a breather on the driver side but the breather isn't really a breather...... it's a closed cap without a filter. So does this mean that i'm not getting any "suck" therefore no "blow"? What are the consequences?

Starfury

Yes, that's what that means. The consequences are increased buildup of corrosive gases in your crankcase, which aren't good for you engine long-term.