PCV Valve

[TylerCharger69]

I was looking at some pics on the forum here  and i noticed the most recent pic added was of an engine with no pcv valve but breather filters on both valve covers.....What are the pros and cons of this setup?  Im running a pcv  on one valve cover....and a breather on the other currently

[terrible one]

Bump because I'd like to know as well!

[TylerCharger69]

 

[TylerCharger69]

bump......again???

[mikepmcs]

This is what Ron says.
http://www.dodgecharger.com/forum/index.php/topic,63310.0.html

more
http://www.dodgecharger.com/forum/index.php/topic,70481.0.html

http://www.dodgecharger.com/forum/index.php/topic,7331.0.html

[b5blue]

I run mine per stock (440 .060 overbore with a six pack) and have never had any issues.  (Even before the rebuild with the nasty 509 cam)

[TylerCharger69]

After reading the threads Mike posted.....is it safe to say that the entire PCV system is kind of the same premise as having to open up a big tin can of juice with and old "church key" on both sides so it can pour?   I don't have blow by issues, but currently, I have a PCV on one valve cover and just a sealed cap on the other.   Its clear I need to incorporate a breather on the opposing side.    NOW......what would happen if a PCV valve was run from BOTH valve covers?   I've seen this before too.   Or would that be one pulling against the other and defeat the purpose?   Very interesting thread!!!   Thanks for posting those thread links Mike!!

[gtx6970]

Or would that be one pulling against the other and defeat the purpose?

Yes

PCV system NEEDS incoming air to function properly. without a good crankcase evacuation system of some kind there is going to be seal leaks

If you run a PCV without an open vent on the opposite side, it is going to pull air from somewhere, probably past the rings. And regardless of how good of a ring seal one has, It will ALWAYS will have a small amout of blowby

[Piston_Freddy]

Can you see the problem here?

What will happen if I run the engine like this?Gasket leaks?

[mikepmcs]

besides that  it needs a breather....
what's that rubber hose on the left side along the aircleaner?
is that a fuel line??? 

[Piston_Freddy]

besides that  it needs a breather....
what's that rubber hose on the left side along the aircleaner?
is that a fuel line??? 

Yes that is a fuel line, whats wrong with it?

[TylerCharger69]

Well.....a rubber hose being that close to the engine itself is a disaster waiting to happen.   It may not be hot enough to burn through, but the heat is sure to weaken the integrity of the hose and cause it to become brittle and crack.  Ive also HEARD,  (note the emphasis on "heard") that a rubber hose in that location can cause vapor lock, but i haven't witnessed that myself.  I have a rubber hose, but it's routed on the fender firewall and then straight to the carb with an inline filter also mounted on the firewall.

[mikepmcs]

yup need to get rid of that rubber hose and get some metal in there. at the very least get it up and off the motor away from the heat(until you get some other line). 

[chargd72]

To answer your question, I don't think you'll have gasket leaks since you don't have pcv vacuum to create negative pressure. Without a pcv or a breather your asking for some vapor build up which only leads to bad things. I'm not an expert, just relaying what I've read. But if I were you, I'd run the correct setup with breather on one side and pcv on the other.

[Al]

To answer your question, I don't think you'll have gasket leaks since you don't have pcv vacuum to create negative pressure. Without a pcv or a breather your asking for some vapor build up which only leads to bad things. I'm not an expert, just relaying what I've read. But if I were you, I'd run the correct setup with breather on one side and pcv on the other.

What would be a good PCV valve to use? I got the standard replacement plastic one and it keeps falling out of the rubber grommet.
Al

[Piston_Freddy]

Thanks for the input! I will deal with these problems!

[bull]

To answer your question, I don't think you'll have gasket leaks since you don't have pcv vacuum to create negative pressure. Without a pcv or a breather your asking for some vapor build up which only leads to bad things. I'm not an expert, just relaying what I've read. But if I were you, I'd run the correct setup with breather on one side and pcv on the other.

What would be a good PCV valve to use? I got the standard replacement plastic one and it keeps falling out of the rubber grommet.
Al

Sounds like you need a new grommet.

[Al]

To answer your question, I don't think you'll have gasket leaks since you don't have pcv vacuum to create negative pressure. Without a pcv or a breather your asking for some vapor build up which only leads to bad things. I'm not an expert, just relaying what I've read. But if I were you, I'd run the correct setup with breather on one side and pcv on the other.

What would be a good PCV valve to use? I got the standard replacement plastic one and it keeps falling out of the rubber grommet.
Al

Sunds like you need a new grommet.

I got the cast aluminum Mopar valve covers, the grommet is new.

[Piston_Freddy]

Do mopar performance valve covers have baffles inside, to prevent oil coming through PCV valve in to the intake?

[bull]

What would be a good PCV valve to use? I got the standard replacement plastic one and it keeps falling out of the rubber grommet.
Al

Sunds like you need a new grommet.
[/quote]

I got the cast aluminum Mopar valve covers, the grommet is new.

[/quote]

Something's the wrong size then it seems. I got a new grommet and PCV valve from my Dodge dealer and it's tighter than my cheap brother.

[Manifold]

Do mopar performance valve covers have baffles inside, to prevent oil coming through PCV valve in to the intake?

I'm glad someone brought this up. If you add in a PCV valve and a breather, be sure you have baffles underneath each of them... unless you like an oily mess on the top of your valve cover. The aluminum MP valve covers have the provisions for baffles to be added. Didn't buy mine new, but the PO didn't bother to install a baffle under the breather (there was one under the PCV valve) and the top of the cover gets quite messy. Some self tapping screws and a piece of sheet aluminum made quick work of that issue.

[myk]

yup need to get rid of that rubber hose and get some metal in there. at the very least get it up and off the motor away from the heat(until you get some other line). 

Wow, I've run a rubber line just like that since I've owned the car.  I guess I'd better look into steel lines ASAP...

[Piston_Freddy]

Do mopar performance valve covers have baffles inside, to prevent oil coming through PCV valve in to the intake?

I'm glad someone brought this up. If you add in a PCV valve and a breather, be sure you have baffles underneath each of them... unless you like an oily mess on the top of your valve cover. The aluminum MP valve covers have the provisions for baffles to be added. Didn't buy mine new, but the PO didn't bother to install a baffle under the breather (there was one under the PCV valve) and the top of the cover gets quite messy. Some self tapping screws and a piece of sheet aluminum made quick work of that issue.

Thanks, probably my valve covers ain't got them.

[Al]

[/quote]

Sunds like you need a new grommet.
[/quote]

I got the cast aluminum Mopar valve covers, the grommet is new.

[/quote]

Something's the wrong size then it seems. I got a new grommet and PCV valve from my Dodge dealer and it's tighter than my cheap brother.
[/quote]

Are these the right ones? http://www.summitracing.com/parts/DCC-4529882/

[TylerCharger69]

Those valve covers come with the baffles  although you have to install them yourself.  They are in a separate bag when they are brand new....at least mine came with them