Hollow PCV

mandingo

mandingo

She's an Alcoholic
On my passenger side valve cover i have a working PCV with an oil seperator with vac comming from TB, on the drivers side i had a breather with a foam filter, the filter would get oil and start dripping on my valve cover, :idea: so i took a new PCV valve and cut the tip off making it hollow, put a hose on it and ran the hose about 2 inches from the ground, no more drips on the valve cover, :dunno: anyone see any problems with doing it that way?
 
sy2675

sy2675

He Saved the Pimp'n Game!
Re: Hollow PCV

mandingo said:
On my passenger side valve cover i have a working PCV with an oil seperator with vac comming from TB, on the drivers side i had a breather with a foam filter, the filter would get oil and start dripping on my valve cover, :idea: so i took a new PCV valve and cut the tip off making it hollow, put a hose on it and ran the hose about 2 inches from the ground, no more drips on the valve cover, :dunno: anyone see any problems with doing it that way?
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problem, oil drips put of hose and is either on your driveway, garage, or the track. Or it gets airbourne and puts a thin layer of oil all over the bottom and back side of your truck and others behind you. Use a catch can or something similar.
 
SyTyJedi

SyTyJedi

Jedi Council
Re: Hollow PCV

The drivers side serves as a way for fresh air to enter the crankcase. If you have oil leaking from it, you should check and make sure that both PCV valves on the passenger side are hooked up correctly. One is for venting during normal driving, the other venting during boost.
 
T-Bone

T-Bone

Active member
Re: Hollow PCV

Why not just take out the oil dipstick and run the hose down inside the tube.....then the oil can get recycled through your motor endlessly and you won't have the drip to deal with.
 
mandingo

mandingo

She's an Alcoholic
Re: Hollow PCV

SyTyJedi said:
The drivers side serves as a way for fresh air to enter the crankcase. If you have oil leaking from it, you should check and make sure that both PCV valves on the passenger side are hooked up correctly. One is for venting during normal driving, the other venting during boost.
Click to expand...
Just so im understanding this, the drivers side one is under boost it would vent through the breather filling it with oil, if i left the PCV valve in there, under boost wouldnt it close and not let any ventilation through, thus the breather idea, and by hollowing it out it vents, and i'll put a catch can on, BTW on the passanger side i only have one
 
mandingo

mandingo

She's an Alcoholic
Re: Hollow PCV

T-Bone said:
Why not just take out the oil dipstick and run the hose down inside the tube.....then the oil can get recycled through your motor endlessly and you won't have the drip to deal with.
Click to expand...
Not a bad idea, lol Screaming Eagle
 
SonomaGTlover

SonomaGTlover

Doghouse Member
Re: Hollow PCV

The drivers side serves as a way for fresh air to enter the crankcase. If you have oil leaking from it, you should check and make sure that both PCV valves on the passenger side are hooked up correctly. One is for venting during normal driving, the other venting during boost.
Click to expand...
I agree here... You need 2 PCV's on the pas side. I have the "T" to make this happen if you need it. Be sure you have the correct PCV's in the propper place, they are different. Let me know.
 

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SyTyJedi

SyTyJedi

Jedi Council
Re: Hollow PCV

mandingo said:
Just so im understanding this, the drivers side one is under boost it would vent through the breather filling it with oil, if i left the PCV valve in there, under boost wouldnt it close and not let any ventilation through, thus the breather idea, and by hollowing it out it vents, and i'll put a catch can on, BTW on the passanger side i only have one
Click to expand...

The drivers side will allow air to enter the crankcase due to the vaccuum created by the PCV on the passenger side valve cover that vents under boost. It actually vents under vaccuum as well, as it is BEFORE the turbo inlet - that is the only part of the motor that is under vaccuum when the motor is above atmospheric pressure (in boost).

Putting a catch can on a PCV setup defeats the purpose. What is creating the vaccuum to remove the pressure from the crankcase? Some people may say to just run a catch can and let the motor force the pressure out. What is the motor going to use to force that pressure out? HORSEPOWER. Hey, if you've got power you don't care about, by all means run a catch can. It's also gonna be harder on your rings and seals, and you may see an oil leak spring up here or there. There is a reason why car manufacturers are still designing motors with this in mind. I don't know more than their engineers do, but I understand their system and how it was intended to work so I am a fan of leaving it in place and letting it do it's job.

Oil is not getting recycled in this case, AIR is. Running the PCV into the dipstick (lol) is not going to do anything, what is creating the airflow? People associate oil with PCV because there is oil mixed in the air. Run a seperator or a can plumbed back IN to the motor to seperate the oil out of the air while still letting the system do it's job.
 
SonomaGTlover

SonomaGTlover

Doghouse Member
Re: Hollow PCV

Here's the driver side cover. I have a breather filter on the back but I think it usually vents into the air box... correct me if I'm wrong. The front is just the filler tube hole. I deleted the tube and just have a cap. Next week it'll all be gone for a set of "one off" aluminum covers for roller rocker clearance. I can take better pics then if you need them.
 

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mandingo

mandingo

She's an Alcoholic
Re: Hollow PCV

SyTyJedi said:
The drivers side will allow air to enter the crankcase due to the vaccuum created by the PCV on the passenger side valve cover that vents under boost. It actually vents under vaccuum as well, as it is BEFORE the turbo inlet - that is the only part of the motor that is under vaccuum when the motor is above atmospheric pressure (in boost).

Putting a catch can on a PCV setup defeats the purpose. What is creating the vaccuum to remove the pressure from the crankcase? Some people may say to just run a catch can and let the motor force the pressure out. What is the motor going to use to force that pressure out? HORSEPOWER. Hey, if you've got power you don't care about, by all means run a catch can. It's also gonna be harder on your rings and seals, and you may see an oil leak spring up here or there. There is a reason why car manufacturers are still designing motors with this in mind. I don't know more than their engineers do, but I understand their system and how it was intended to work so I am a fan of leaving it in place and letting it do it's job.
Click to expand...

Ok so what im understanding is the best way to go, is to have a t-fitting on the passenger side PCV and TB hose connecting the drivers side PCV to create the necessary vaccuum for both sides
 
mandingo

mandingo

She's an Alcoholic
Re: Hollow PCV

SonomaGTlover said:
There is a "T fitting" in the pass side... TWO PCV's there, one going to the crossover tube and the other to the intake.
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Well i guess i need to shop for a T-fitting, BTW in your pic your using a breather not a PCV on the drivers side :dunno:
 
Flyin Ryan

Flyin Ryan

hated cuz he drives fords
Re: Hollow PCV

I remember my driver's side valve cover had a metal tube coming out of it with a small filter on the end of it.. It looked stock so I think it was but in any case when putting a cone filter or changing out the stock air box setup it's said that you have to replace that tube/filter deal with a valve cover pop in still filter I guess to allow for more air intake to keep up with the added air intake of the new filter/box setup you just put in would be my guess
 
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