Death to PCV

[tom h]

The PCV valve provides a suction , and therefore a movement of fresh air, thru the crankcase. The fresh air enters the valve covers either valve cover breathers, or in a totally stock car, from the air inlet on the turbo inlet bell.

If the PCV valve is left dangling and open, Yes, the correct controlled "leak" of air into the throttle body for correct MAF calibration will occur.

But unless PCV is sucking directly out of the crankcase, breathers alone will not create the constant movement of fresh air thru the crankcase to carry off the corrosive vapors and moisture.

 

[timothydog]

Mark,
Please explain how to make this oil/air seperator.
Thanks
tim

Originally posted by Buick Mark
Theres a constant mist of oil all around the crankcase from the spinning crank, rotating rods, pistons going up and down, and from the cam and lifters, this gets sucked in the PCV even with the correct intake valley pan, and is hard to control because of the relatively small crankcase of the engine. I have tried plugging the PCV and this seems to work the best, but as Dave has said it will mess up the MAF calibrations. Right now Im using my own "PCV oil /air seperator" so I can still use the PCV without the oil mist getting sucked in the throttle body. It seems to be the best of both worlds Mark

 

[WSLN 6]

Could a person just use a check valve and filter from a vacuum brake setup?
Wouldn't this take care of all the problems?

 

[Bobtempest]

When at the track plug the pvc and run without it, will not hurt anything and you don't worry about a possible leak in the pcv under high boost.
But always run it on the street with a check valve, do not drive without it! Carl's setup with the Fram G3 fuel filter is a good idea also.

 

[Buick Mark]

I actually use a water/oil seperator for compressed air applications (home or shop compressor) You can get them at Sears or anyplace that sells compressors. Just plumb the intake side into the direction the arrow is pointing on the dryer, and the PCV side goes in the other side. This is so the flow thru the dryer is going the proper direction. I mounted it in front of the pass. side wheel, up under the fender. I had to make a few fittings, but what else is new Mark

 

[Russ Merritt]

THAT'S IT!!!!! I'm sick of the smoke on start up! Brand new engine and it smokes on start up just like before. Took the plenum off and intake is coated with oil. Does't matter what PCV valve I use, I've tried em all. There, that's the end of that!

 

[Russ Merritt]

WHAT A F@#$#@ MISTAKE!!!!!! Checked my oil today, white milkshake Thought I blew my first HG. NOT!!! The oil was fine just everywhere the blowby gases come out was white puddin. I'll keep on puffin thanks!

 

[325DR]

I am having the same problem---- New motor, blue smoke, loss of oil AND ITS CAUSE OF THE PCV!!!!!!

I am using a valley pan intake gasket.


What is the correct part number for the PCV to use?

 

[U1ARUNIT]

AC cv893c

 

[TurboDave]

Originally posted by WSLN 6
Could a person just use a check valve and filter from a vacuum brake setup?
Wouldn't this take care of all the problems?

No, you're forgetting what I said about needing the "correct" amount of metered vacuum at that point. Check valves DO NOT provide that. If you must run a check valve (I wont go there), then run it with the PCV, not in place of it.

 

[TurboDave]

Originally posted by REDS HOT AIR
worst case i know of is oil will get dark sooner

my oil seems to be just fine but then again how often do we change our oil ?

factory recomended every 7500 miles so i dont see no downsides to it.

the only time it does anything is when you have vacuum and if you drive like me mines not on the vacuum side of the gauge too often.

only thing it does if pull fresh air in the breathers and pulls fumigated air into the intake.

to me i'd rather change my oil more than have oil residue in my intake and be getting knock.

i ran my hotair and my i/c motor with no pcv and havent seen no downsides to it.

i just leave the pcv valve in the hole and plug it where it comes from the t/b or even better put vacuum brakes on it and run your hose to it..

Robert;
What you see running out of your oil pan doesn't reflect what's left in your engine!! Running without a PCV only takes a few miles to start the damage on a "driver". You wont see it in the oil you drain, but be prepared for a serious shock the next time you pull your engine apart. You aren't going to like what you find. The thick nasty sludge that you're going to find aint goin' to be pretty.

 

[Russ Merritt]

A few miles, you ain't sh%$#^!!!! It was less than 100! Turbo Dave, you don't have to rub it in....................Well maybe a little

 

[Dan Thompson]

I know this wil sound dumb, but changing the PCV was the hardest thing I've done, even harder that changing the fuel pump or the plugs or building my Cold Air System.

There must be a trick to pushing the PCV into the grommet without pushing the grommet into the valley pan.

I use lube on the PCV, silicone on the grommet. Finally I removed most of the shoulder on the engine side of the PCV to get it in.

Death to the PCV.

 

[tom h]

Originally posted by Dan Thompson
I.. changing the PCV was the hardest thing I've done, even harder that changing the fuel pump or the plugs or building my Cold Air System.

There must be a trick to pushing the PCV into the grommet without pushing the grommet into the valley pan.

That's odd... my PCV slips easily in & out of the grommet. I use just a little vaseline to make it a bit slippery.

 

[REDS HOT AIR]

Originally posted by TurboDave
Robert;
What you see running out of your oil pan doesn't reflect what's left in your engine!! Running without a PCV only takes a few miles to start the damage on a "driver". You wont see it in the oil you drain, but be prepared for a serious shock the next time you pull your engine apart. You aren't going to like what you find. The thick nasty sludge that you're going to find aint goin' to be pretty.

i go in it once in a while and check things out..

matter fact im pulling it out tonight and will be going in it..

blew my tranny up again yesterday and sending my converter out to be loosened up so good time to check my bottom end out and make sure all looks good and im gonna mill my intake down to line my ports back up since im running single steel shims now my intake sits too high.

keep in mind with my total seal rings im not getting all the blowby some get.

next event i have planned so far is running in the import demestic shootout at budds creek maryland if anyone wants to come up it is Nov. 10th

i plan to put some supras to shame.