Valve breathers that plug onto your oil fill location yes/no?
01-21-2010, 01:25 PM
#41
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spot on i'm glad we're on the same page you know my fresh air line doesn't have vac. at least at idle anyway and teke184 where did you cause the leak hes right anything between the pcv valve and intake you just made a vacum leak propably 3x the pcv valve it self that section of the sys is the only one that can change the amount of vacum leak hope all this helps Last edited by ssdeuce74; 01-21-2010 at 01:32 PM.
01-21-2010, 07:58 PM
#43
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the cure for oil in the intake is to remove the ENTIRE PCV system & plug all holes in the valve covers. i had a popular catch can on my car & was still getting a trace of oil in the intake. on the spray that can lead to detonation. i removed all hoses & plugged them & have a Metco breather on the way. this way will cause no tune issues that i can see.
01-23-2010, 04:17 PM
#45
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I had a metco breather on mine but I got tired of the oil spewing out onto my LT's. I need to go thru my PCV system and make sure all's well. I did the following to mine;
Breather in rear or driver side valve cover
Hose from valve cover to intake(no PCV or catch can)
Metco breather in place of oil cap.
Does everything sound right for my setup? I'm wanting to add a catch can soon.
Breather in rear or driver side valve cover
Hose from valve cover to intake(no PCV or catch can)
Metco breather in place of oil cap.
Does everything sound right for my setup? I'm wanting to add a catch can soon.
01-23-2010, 05:22 PM
#46
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header evac send all that crap out the exhaust instead of in or on top the engine unless you get grommets with baffles in them so the oil dosen't have a straight shot to the breather
03-01-2010, 10:41 PM
#47
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I'd have to agree with everyone who believes that the stock pcv system with the breather WILL allow UNmetered air in causing high ltft's. Even though a pcv valve will allow only so much air to enter the intake once you create a fresh air source closer to the vacuum point on the passenger valve cover it will draw some or most of the air from the breather rather than the throttle body. A friend of mine with a stock pcv system put a metco breather on and his ltft's are jacked up. We will experiment with this soon to make sure. In my case i have a breather but im also mafless so this does not affect my tune. Also I find it hard to believe the maf was programmed knowing the pcv valve's airflow and accounting for it.
03-02-2010, 05:04 AM
#48
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Please everyone, don't remove the PCV system on your daily driver.
03-02-2010, 12:33 PM
#50
and as far as the PCV metering... it does not meter anything, its a check valve, it opens under vacuum, and closes under lack of vacuum or under intake pressure conditions, such as boost or a backfire, some manufacturers have even called them flame arrestors becuase they close when there is a backfire into the intake.
03-02-2010, 01:23 PM
#51
The onebreather should be enough, you can run a hose between the back of the drivers side around to the back nipple on the passenger's side so the pressure is equeal, then just cap everything.
I'd rip the PCV off 100%, and make sure there's no hookup to the intake anywhere from the crankcase, this will 100% stop the oil from getting in the engine bay.
I usually cleaned the metco breather off with some carb clean on a regular basis, think of it like this, a normal air filter stops stuff like dirt and oil from getting into the intake, the filter, if you clean it it will stop the oil mist from getting all over the engine bay no problem.
I've seen people put a cloth ring around the breather filters to catch the oil in the past, but I always found by keeping the filter clean it would do it's job no problem.
I'd rip the PCV off 100%, and make sure there's no hookup to the intake anywhere from the crankcase, this will 100% stop the oil from getting in the engine bay.
I usually cleaned the metco breather off with some carb clean on a regular basis, think of it like this, a normal air filter stops stuff like dirt and oil from getting into the intake, the filter, if you clean it it will stop the oil mist from getting all over the engine bay no problem.
I've seen people put a cloth ring around the breather filters to catch the oil in the past, but I always found by keeping the filter clean it would do it's job no problem.
03-02-2010, 03:08 PM
#52
The onebreather should be enough, you can run a hose between the back of the drivers side around to the back nipple on the passenger's side so the pressure is equeal, then just cap everything.
I'd rip the PCV off 100%, and make sure there's no hookup to the intake anywhere from the crankcase, this will 100% stop the oil from getting in the engine bay.
I usually cleaned the metco breather off with some carb clean on a regular basis, think of it like this, a normal air filter stops stuff like dirt and oil from getting into the intake, the filter, if you clean it it will stop the oil mist from getting all over the engine bay no problem.
I've seen people put a cloth ring around the breather filters to catch the oil in the past, but I always found by keeping the filter clean it would do it's job no problem.
I'd rip the PCV off 100%, and make sure there's no hookup to the intake anywhere from the crankcase, this will 100% stop the oil from getting in the engine bay.
I usually cleaned the metco breather off with some carb clean on a regular basis, think of it like this, a normal air filter stops stuff like dirt and oil from getting into the intake, the filter, if you clean it it will stop the oil mist from getting all over the engine bay no problem.
I've seen people put a cloth ring around the breather filters to catch the oil in the past, but I always found by keeping the filter clean it would do it's job no problem.
03-02-2010, 03:57 PM
#53
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Also, if your run the breathers and delete the pcv system you will need to change your oil very frequently. Don't try going 3000 miles between changes and expect your bearings to live for long. The PCV systems routes oil contaminants back into the intake to be burned. They don't get burned without the PCV. I have dual breathers and change my oil every time I take it to the track and filter every other time. The oil smells like gas after 5-6 passes.
03-02-2010, 05:56 PM
#54
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I'm running pcv/catch can and breather filter. I dont have any issue on my motor, mods are H/C, headers, PP intake, MW TB, heads have 57cc chambers so my compresion is up from stock. I dont get SES light, A/F is good. the 25% fuel added is caused from too much air leaking into the intake system. be the pcv or intake gasket. therfore the front 02 oxygen sensors are picking up a lean condition there for adding fuel...... pcv is only for emmisions. back in the day the crankcase oil/fuel mist was vented by breather caps. vacum pumps is commonly used on high HP motors help keep the piston ring seals seated against the piston for optimum compression and at the same time minimize oil aeration. if your car is a street N strip type then I dont see why/how breather and catch can will hurt engine performance, but for a daily driver atleast you need a catch can and pcv system.....
01-05-2011, 03:24 PM
#57
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if the idea of the pcv system is just emissions ... im sure there is a way to reduce oil inside our intake.. without changing oil every 3000 miles !! my intake is messy but hey im not retarted to change oil monthly on a DD.
if the idea of the pcv system is just emissions ... im sure there is a way to reduce oil inside our intake.. without changing oil every 3000 miles !! my intake is messy but hey im not retarted to change oil monthly on a DD.
05-03-2011, 01:54 AM
#58
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If I delete the whole pcv and use a breather on the passenger side valve cover do I need to put a breather on the driver side also? I already plugged all the hose fittings
05-03-2011, 09:05 AM
#59
Joey you can just run a rubber hose from teh crovers side to the passenger's side, utilize the PCV connections to connect the 2 valve covers if you like.. this way there's equeal pressure on the top of both sides of the motor if you're worried about it.
Then cap the intake, front pcv connection point, and shitcan that little rubber line running from the TB to the valve cover as well.
Reaperchild you should be changing the oil every 3000 regardless wether you have a PCV on the car or not. Don't be a cheap ***.
Then cap the intake, front pcv connection point, and shitcan that little rubber line running from the TB to the valve cover as well.
Reaperchild you should be changing the oil every 3000 regardless wether you have a PCV on the car or not. Don't be a cheap ***.
05-03-2011, 10:24 AM
#60
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yeah i have heard many people talk about the pcv mod and how successful it is. im doing it very soon to my ls1. running dual breathers on the valve covers. but im trying to find something cheaper than 40 dollars a pop for a damn air filter with a seal and o-ring around it. ill probably end up trying to fab up my own.