Ok guys, i think im getting alot of blowby in my motor, cause if i take the pcv valve out or the oil filler cap off while the motor is running there is a substantial amount of smoke coming out of the valve cover. My question is would would cause this.... it really hasent been doing this until just the other day, and the only thing i changed was i went from mobil 1 5w-30 to mobil 1 10w-30....

But one thing that bothers me is that the extra line coming from the back valve cover(i think yall said it was a recal or something, is plumbed in to my intake, and (my car is turbo charged) the smoke from the blowby in the motor is coming out of my blowoff valve under the deck lid and during driving u can see smoke coming out of the drivers side louver... can i just plug the back line from the valve cover off so im not gettin the smoke out the blowoff valve or does that line need to be open....

Sry for the long post

Thanx
Justin

Sound like your not connected correctly. The pcv valve is suppose to be pulling the crankcase air and oil fumes out of the engine into the intake and burn them. The other line from the other valve cover is suppose to be clean makeup air into the crankcase. This was replumbed to the intake hose before the throttle body in the recall. It originally came from the air cleaner but was moved. You need it to be clean air because it needs to go into the crankcase and out the other valve cover via the pvc valve.

Hope that makes since.

So your saying that the back line is supposed to pull air in???? well its blowing smoke out that line at idle i really havent looked to see what it does if u gas on it but im sure its the same thing, but if im correct the pcv valve should take suck all the smoke out the valve covers right.....

Yes air should be pulling in the back one. If not then it is usually one of two things.

Either you pcv valve is bad or the port it connects to is plugged and not pulling enought, or the bad one...you have way to much blow by.

If you pull the hose to the pcv valve the engine should die or close to it. If you pull the pvc valve from the valve cover and start the engine it should be pulling air. When you shake the valve it should be lose and rattle. Just a positive test but might tell you something. You can alway replace it just to be sure.

The metal tube from the rear valve cover going into your air intake tube CAN NOT BE PLUGGED!!!!!!!!!!
You may cut the metal tube and place a small air filter on it; many companies make the very small filters.These are available at any auto store. This tube is supposed to let the back area inside the valve cover breathe. Plugging the tube could cause the pressurization of the area above the rear valves. Blow by is caused by a pressurization of the crankcase, which is always supposed to be at neutral pressurization, meaning none. Once the crankcase is pressurized, normally because of a broken piston, a broken or badly worn piston ring or two, the combusted gasses pass through the broken piston or broken ring into the crankcase and then up through the rear vent tube and into your engine intake. If your car is turboed, I would guess that you have a broken piston ring. Ed

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I just know that if u pull the pcv valve line off the car does nothing, its like i didnt pull it, but other than the blowby its still running the same and sure as hell just as fast as the day i got it so i really dont know wat the deal is....

quote Originally posted by JCurry: I just know that if u pull the pcv valve line off the car does nothing, its like i didnt pull it, but other than the blowby its still running the same and sure as hell just as fast as the day i got it so i really dont know wat the deal is....

I think what dodgerunner is saying --- is if you pull the pvc line off ---under the plentum ---it will stall or idle down on you--I think what your doing is pulling the pvc line at the vavle cover (trunk-side) --which should not do much in that manner as above. At least mine don`t either--at the valve cover. On your firewall side --under the back window---that hole in the vavle cover needs to either 1.be sent back through your air intake 2. hooked up some how so it can breath--as firefighter said above--run a hose off it with one of those tiny air breathers, stick a tiny air breather down in that groment, or route as stock --back through your intake line some how.

wat im really wanting to accomplish is that i dont want the smoke that is coming out of the valve covers to be visible from the outside....

Ok, one more time. If you pull the hose, that connects to the pcv valve, off the pvc, do you have a lot of vacuum on the hose? does the engine die or run bad? You should have a lot of vacuum on the hose since it is a large hose.

If you don't have much vacuum on the hose that is your problem. The crankcase is not being vented as needed.

Why: Could be the port on the intake where the hose connects to is pluged up. The hose could be bad and full of crud inside or flaking off inside. If so replace it.

My guess is that one of those is your problem. A working pvc system should be able to hand a far amount of blow by.

[This message has been edited by Dodgerunner (edited 06-11-2006).]

you say the car is turbocharged i would think you would want the pcv hooked up onthe suction side of the turbo due to when you build boost it will close the pcv due to the presure trying to be forced back down to the valve covers due to your intake manifold has presure instead of vacume when you are under boost i would talk to some one who knows turbos and how your pcv should be hooked up

[This message has been edited by engine man (edited 06-11-2006).]

That's a good point. If it is connected to the output side of the turbo you would not have any vacuum. You would want it on the input side of the turbo and might also want to have a good hose to the pvc. If the turbo is pulling high vacuum on the input side you don't want the hose to collapse.

[This message has been edited by Dodgerunner (edited 06-11-2006).]

Well the pcv valve is on the stock location on the front valve cover and thats what i thought was it would be able to pull most of the blowby out and i shouldnt be getting it flowing out of the back metal line

The pvc should be on the valve cover. That is correct. Its the other end of the hose from the pvc. Where is it connected? It needs to be before the turbo not after it...