How to stop oil evoparation
Joined: Oct 2008
Posts: 4,805
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From: St.Petersburg/Tampa, FL
Originally Posted by JUSTINTHECOASTIE' timestamp='1424266923' post='23510266
You don't need the PCV, but you do need the larger breather port toward the front of the head. Look at the diameter of the pcv itself in your hand and then explain to me how it 'vents' enough pressure compared to the front breather. PCV is emissions ONLY. Front breather vents pressure
PCV is under a vacuum by the manifold which assists greatly in exhausting moisture, fuel and whatever else that might be a vapor.
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Joined: May 2006
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From: Emmett
Originally Posted by macr88' timestamp='1424291369' post='23510882
[quote name='JUSTINTHECOASTIE' timestamp='1424266923' post='23510266']
You don't need the PCV, but you do need the larger breather port toward the front of the head. Look at the diameter of the pcv itself in your hand and then explain to me how it 'vents' enough pressure compared to the front breather. PCV is emissions ONLY. Front breather vents pressure
You don't need the PCV, but you do need the larger breather port toward the front of the head. Look at the diameter of the pcv itself in your hand and then explain to me how it 'vents' enough pressure compared to the front breather. PCV is emissions ONLY. Front breather vents pressure
PCV is under a vacuum by the manifold which assists greatly in exhausting moisture, fuel and whatever else that might be a vapor.
[/quote]
no worries, just didn't want other people getting confused on the natural flow direction.
If you choose to only vent with the front breather and it works for you then fantastic but I can guarantee you that it won't work for everyone. I tried that same setup and I still ended up loosing oil through the front breather.
It's definitely worth a try, not all cars are equal, kinda like how some people don't even have this issue.
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
Originally Posted by JUSTINTHECOASTIE' timestamp='1424319744' post='23511260
[quote name='macr88' timestamp='1424291369' post='23510882']
[quote name='JUSTINTHECOASTIE' timestamp='1424266923' post='23510266']
You don't need the PCV, but you do need the larger breather port toward the front of the head. Look at the diameter of the pcv itself in your hand and then explain to me how it 'vents' enough pressure compared to the front breather. PCV is emissions ONLY. Front breather vents pressure
[quote name='JUSTINTHECOASTIE' timestamp='1424266923' post='23510266']
You don't need the PCV, but you do need the larger breather port toward the front of the head. Look at the diameter of the pcv itself in your hand and then explain to me how it 'vents' enough pressure compared to the front breather. PCV is emissions ONLY. Front breather vents pressure
PCV is under a vacuum by the manifold which assists greatly in exhausting moisture, fuel and whatever else that might be a vapor.
[/quote]
no worries, just didn't want other people getting confused on the natural flow direction.
If you choose to only vent with the front breather and it works for you then fantastic but I can guarantee you that it won't work for everyone. I tried that same setup and I still ended up loosing oil through the front breather.
It's definitely worth a try, not all cars are equal, kinda like how some people don't even have this issue.
[/quote]
Registered User
Joined: Jul 2014
Posts: 2,629
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From: Fort Walton Beach, FL
Figured I would add my data point. I removed the PCV from my 2006 AP2 valve cover and installed an AN fitting and then ran a 1/2" hose to a vented catch can. I didn't catch any oil during an entire track weekend. I then ran a 1/2" hose from the breather to my catch can so that I had both the PCV and breather run to the same vented catch can, and I caught about half a quart in 4 sessions. So the oil is definitely only coming out of the breather when on track. I am wondering if plugging the breather and instead only running a hose from the PCV location to the vented catch can will still allow the crankcase to breathe enough.
Joined: Jun 2009
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Figured I would add my data point. I removed the PCV from my 2006 AP2 valve cover and installed an AN fitting and then ran a 1/2" hose to a vented catch can. I didn't catch any oil during an entire track weekend. I then ran a 1/2" hose from the breather to my catch can so that I had both the PCV and breather run to the same vented catch can, and I caught about half a quart in 4 sessions. So the oil is definitely only coming out of the breather when on track. I am wondering if plugging the breather and instead only running a hose from the PCV location to the vented catch can will still allow the crankcase to breathe enough.
Registered User
Joined: Jul 2014
Posts: 2,629
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From: Fort Walton Beach, FL
Originally Posted by King Tut' timestamp='1432749994' post='23626625
Figured I would add my data point. I removed the PCV from my 2006 AP2 valve cover and installed an AN fitting and then ran a 1/2" hose to a vented catch can. I didn't catch any oil during an entire track weekend. I then ran a 1/2" hose from the breather to my catch can so that I had both the PCV and breather run to the same vented catch can, and I caught about half a quart in 4 sessions. So the oil is definitely only coming out of the breather when on track. I am wondering if plugging the breather and instead only running a hose from the PCV location to the vented catch can will still allow the crankcase to breathe enough.
Registered User
Joined: Jul 2009
Posts: 1,024
Likes: 1
Figured I would add my data point. I removed the PCV from my 2006 AP2 valve cover and installed an AN fitting and then ran a 1/2" hose to a vented catch can. I didn't catch any oil during an entire track weekend. I then ran a 1/2" hose from the breather to my catch can so that I had both the PCV and breather run to the same vented catch can, and I caught about half a quart in 4 sessions. So the oil is definitely only coming out of the breather when on track. I am wondering if plugging the breather and instead only running a hose from the PCV location to the vented catch can will still allow the crankcase to breathe enough.
Have you already drilled the baffle inside the valve cover? I was going to try venting both breathers to a catch can and drilling the baffle...