oil breather

hemimike06 · Feb 4, 2008

i have a 06 and just wanted to know could i put a breather filter right on the the oil cap to elminate the hose going from the oil cap to the cai? any pros or cons to this?

Hemi Dave K · Feb 4, 2008

I have an 04 and I just put a breather on. No problems so far.

HemiByrd · Feb 4, 2008

I've had the stainless filter on mine for quite a while with no problems. All the auto parts places have these filters. They push right into the neoprene hose from the filler neck. I put hose clamps on the hose where the filter connects and where it connects to the oil filler neck. Sorry. Pic is a little out of focus.

Big Budda · Feb 4, 2008

Ditto

Ram1500 · Feb 4, 2008

has this mod helped w/condensation that builds up under oil cap in the winter

HemiByrd · Feb 4, 2008

quote:Originally posted by Ram1500:
has this mod helped w/condensation that builds up under oil cap in the winter

Not that I can tell. I changed oil yesterday and had some condensation under the cap. However using a filter instead of feeding the breather into the intake has to help keep oily air out of the throttle body.

Superjay · Feb 4, 2008

quote:However using a filter instead of feeding the breather into the intake has to help keep oily air out of the throttle body.

Ya got the flow going the wrong way, buddy.

HemiByrd · Feb 4, 2008

quote:Originally posted by Superjay:

quote:However using a filter instead of feeding the breather into the intake has to help keep oily air out of the throttle body.

Click to expand...

Ya got the flow going the wrong way, buddy.

True. In through the breather, out through the PCV.

kc1965 · Feb 4, 2008

From the pictures,it's hard to tell,but,do you put the filter in-line(like a gas filter)or,run it straight to the filter and stop it?

HemiByrd · Feb 4, 2008

quote:Originally posted by kc1965:
From the pictures,it's hard to tell,but,do you put the filter in-line(like a gas filter)or,run it straight to the filter and stop it?

Straight to the filter.

kc1965 · Feb 4, 2008

thanks,Dave. I just had my throttle body cleaned because I left off that hose when I did an air cleaner mod in November.Don't want to do that again.

SilsHemi · Feb 5, 2008

Food for thought.

From a long time Dodge dyno operator and technician.

quote:The PCV valve, in a correctly designed PCV system, evacuates the blow-by gasses from the crankcase by routing the gasses back into the intake manifold to be re-burned. The highest flow through the PCV valve is during high intake manifold vacuum situations such as part throttle cruising and the lowest flow through the PCV valve is at WOT, due to the lack of intake manifold vacuum.

Fresh air is also supplied into the crankcase and it is sometimes called makeup air because it replaces the air that is sucked into the intake manifold through the PCV valve. Typically the fresh air port is after the engine's air filter so that the air going into the crankcase is clean, since dirt and oil don't play very well together.

At wide open throttle the engine is producing its highest amounts of blow-by gasses. Blow-by gasses are combustion gasses that get past the piston's compression rings during combustion and into the crankcase. These blow-by gasses are the by products of combustion and they are very toxic and high in NOX gasses. These toxic gasses need to be properly evacuated from the crankcase and replaced with fresh clean air to prevent corrosion and oil sludging in the crankcase.

At wide open throttle the air cleaner system will have a slight depression or vacuum in it as well as the air box and inlet air ducts. The fresh air hose is purposely connected to the air box or inlet air duct to take advantage of this vacuum and use it put a negative pressure on the crankcase to aid in evacuating the toxic, corrosive blow-by gasses at WOT, since the PCV valve is mostly ineffective at WOT for the purpose of evacuating blow-by gasses.

By removing the fresh air hose from the air cleaner box or duct and installing a stand alone breather filter element in it's place the effectiveness of the PCV system and it's ability to properly evacuate the toxic and corrosive blow-by gasses will be greatly reduced, because the vacuum from the inlet system will no longer be drawing the blow-by gasses from the crankcase into the intake system at WOT, which will also result in the crankcase pressures being higher robbing horsepower.

kc1965 · Feb 5, 2008

so,to decipher all that-this shouldn't be done?

Guest · Feb 10, 2008

The filter will work just fine, just make sure you have it standing up, or you can get some oil blowing back out of it. Mine slumped down, and it got soaked in oil, although it could have been from when I recently changed the oil also.

UsmcMan96 · Feb 10, 2008

By looking at those pictures, my oil filler cap is AWOL, crap. I guess I stick a rag in the hole until I can buy a new one. Asise from the deal, where can I get one?

oil breather

hemimike06

Hemi Dave K

HemiByrd

Big Budda

Ram1500

HemiByrd

Superjay

HemiByrd

kc1965

HemiByrd

kc1965

SilsHemi

kc1965

Guest

UsmcMan96

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