I disagree. A hole can only flow so much air correct? The more load you put your engine under, the more blowby gases you have in the crankcase that need to be ventilated. Therefore, Chevy would have to make this whole big enough from the start to handle any amount of crankcase pressure the car would have at any point in the powerband. Lets say they made the hole big enough to account for X amount of air at idle, then under load the crankcase would still build pressure at full throttle because of more blowby gases being present and overcoming X amount of air. I'm sure they made the hole big enough to handle excess pressure at all RPM's and gave it some room. My point is, if you have a 3 inch whole that is capable of flowing 300cc's for example and the engine only put out 250cc's through it at MAX. If we made that hole 4 inches, it does not change what the engine puts out because it is bigger. So Chevy made the pcv holes to get rid of a certain amount of excess gases but they would not allow it to max out every single time because this would still cause pressure build up. There has to be a margin of error to allow no pressure and to allow gases to flow freely. This hole being bigger just makes it harder for carbon deposits to build up and clog it. Now lets say you don't agree with what I am saying or don't understand it. This small difference in size would never allow the engine to lean out either way and is recommended across the world including in Australia and there has been no reports of leaning out as far as I have heard. Do what you want to with your car. To each its own.

Even then, I would still use a catch can. There would still be dirty vapors containing oil going into the intake valves which would eventually decrease performance and cause you to have to clean them.

Does pcv valve cause oil consumption ?

@@great4ever845 the pcv valve the holes are too small and the catch can prevents oil from going back into intake that causes carbon buildup on the intake valves as they do not get cleaned by gas since it is a direct injected motor.

@@tonyengland6688 so os that a no?

@@great4ever845 it's more so the oil that is in the vapor from that side and if the pcv gets clogged from deposits can cause engine issues like timing chain failure I just did the mods as peace of mind. You can just research about it there's allot of info about it.

Yes 2011 would have this issue as well.

@@mistermanage1119 thanks

Yeah that sucks man. Is it a 2010 or 11?

Same gd thing happened to me at 130K this past April. I have a 2011 LS. I feel your pain.

I personally would get a catch can because it's pretty much preventative maintenance. A bad pcv system could cause oil consumption. The reason why is if the blow by gases keep building up pressure in the crankcase and your valve is clogged or something is not letting the pressure be ventilated, the pressure will find a way out and that is most likely through gaskets and and anywhere else it can get out. That will cause you to have a bad gasket and have a oil leak which leads to oil consumption. Hope that helps.

I go over that in the video.

As far as I know, the V8 doesn't have this issue nor do we have the same valve.

Pull it out and check it. It is a possibility. If its clogged, then its possible pressure was not able to get out and cause it to leak or blow the seal. But it could also be a million other things. If you have oil coming from the front, it can be the timing chain cover. I don't see your car so I'm not sure. I'm also NOT A MECHANIC. So take this advice as you will.

I explain that in the video. They changed the pcv valve in 2013 after they realized the issues.

They fixed it in late 2013. So you should have a plastic one which is bigger. Dont be afraid to check it out.

It flows one way but it is not a one way check valve.

It flows one way but it is not a one way check valve.

The problem was corrected by that year, as said in the video.

If you have the same motor, yes. But it depends on what your PCV system looks like.

If you mean coil overs, Yes.

What if ya dont have 7/64 drill bit?

@@great4ever845 Buy one. $3.99 drill bit is better than a new engine or timing chain repair.

I don't think so. They won't know you did this. What are they gana do, measure the holes?

Hi AJS Porsche. I have a 2009 Commodore VE 3.6 V6 but it's port injection. Is that the same as yours ? This guy seems to be saying this mod is only for direct injection motors.

@@scoldedcat mines a 2007 so definitely not SIDI lol I prefer Port injection anyway. The fuel keeps the valve top cleaner. I've installed a catch can and what not on mine also

@@scoldedcat this mod is for the PCV outlet valve. Which should be on the right hand side bank of the engine regardless of whether direct or port injection

@@AJS86 Yes, I pulled mine out. Not blocked yet (only 112000 k's). The holes sure are small though. I thought he was saying that this mod was only for direct injection motors.

@@scoldedcat it'll help having the holes a little more open either way. However it you will likely get more oil blow by & junk into the plenum and intake without a catch can. Obviously the PCV sends oil blow by into the engine to be burnt for emissions but it just makes a mess inside the plenum

Use pliers

I tried that, it wasn't moving at all

Maybe vice grips. I know its tough but just have to keep trying.

I have a 2013 they come out right??

I'm not sure on those. I discussed in this video that in 2013 they changed the design to the valve to fix the problem. I believe they started using plastic valves which I do not know how to take out.