IMO, the hose was intended to keep vacuum on the passanger side cam cover. But the hose "t's" and goes to the underside of the S/C as well. So at WOT there's boost pressure at one end of the hose, vacuum at the second end and the neutral cam cover at the third end. The stock PCV valve allows oil mist to be vacuumed into the galley under the S/C at idle. At WOT the oil is pushed back towards the PCV but is diverted by the vacuum at the upper plenum. The oil seperator is supposed to remove this oil. The dime simply blocks off the connection completely.

But don't forget the driver side cam cover, there is always vacuum there because of the connection to the rubber boot between the throttle body and mas. So the PCV system is still intact and working.

It's working but not like you would expect, because at WOT the boost pressure under the S/C is also being applied to the passenger side cam cover PCV valve. But the stock valve doesn't stop the boost pressure from entering the cam cover and presserizing the crankcase. The crankcase pressure is relieved out the driver side cam cover carring oil mist to the rubber intake boot between the throttle body and the mas.

Here's my solution:

1) Change the PCV valve on the passenger side cam cover. (EV-98-B) It stops the boost entering the crankcase and venting oil mist out the drivers side cam cover.

2) Adapt the same type PCV valve to fit the driver side cam cover.
This will reduces the velocity of the air flow out the passenger side PCV valve to a normal level at idle. Therfore the oil mist doesn't get vacummed into the galley under the S/C. See photo this thread. Thanks maxpower.

3) Plug the PCV hose at the upper plunem.
In reality this is a redundant connection and not needed.

Thats it.

NoSurprise

 

So the dime cant be used on the drivers side? Lke i said earlier my problem is the drivers side which i have nothing to seperate or block the oil form getting in the intake. The passenger side is fine because the hose has no oil in it because it is all in the sepereator. But lately it seems my seperator doesnt catch as much oil asit used to but there is none in the intake boot from that side so it is kinda a weird problem.

 

What NoSurprise was saying is that you can buy the same PCV setup that you buy for the passenger side, and adapt it on the drivers side... That's really all you can do.

IMO, I've not seen too much oil from that location on my L... I've only seena a little bit insde the intake tube. My major oil issue was coming from the passengerside intake plenum location.

 

LatemodelRacer2,
Step # 1 solves the oil in the driver side intake boot.

NoSurprise

 

I hate to hijack the thread, but does anyone have a picture of this Swanson PCV kit ??? My mom needs Christmas present ideas and I am thinkin of asking for it, but I wanna see what it looks like under the hood.....Thanks

Josh

 

A pic will do no good. There is nothing showing. You end up with another PCV valve used in place of the OEM valve---look's the same. The disc is out of sight inside the upper PCV tube/hose connector.

Dan

 

What About this oil seperator ? I think I've seen on L with it....is it like a catch can for oil on the passanger side ??? Where do I get it how much ?? Pic of it so I can see if its the same thing, I saw ??

Josh

 

The Swanson PCV Kit doesn't have the second PCV valve for the driver side cam cover.

You will have to use a couple of hose clamps and a small piece of vacuum line to adapt the PCV valve to the driver side cam cover.

Remember this PCV is a oneway valve and stops air from being vacuum into the crankcase through the driver side cam cover and therfore reduces the air flow (oil mist) out the passenger side cam cover. THE SOURCE FOR THE VACUUM IS UNDER THE S/C.

Josh, do a search here and on nloc, you will find a ton of information. But don't be confussed, this method works without a seperator and once installed is totally maintenance free.

NoSurprise

 

Ok i see what yall are saying now. I think i will be diffrent and make an adapter to run a seperator on the drivers side. I have nothing to do today since im home sick but its warm in the basement where the L is so ill try it.

Blown5Pnt4

i have one on the passenger side of my L now but it is painted flat black so it doesnt stick out like a sore thumb. Ill take a pic and post it for you.

 

LOL... No Surprise I dont think you got that right.

There is no way no how vacuum is going toward the drivers side cam cover on the drivers side......the engine sucks air from the air filter, throttle body boot and cam cover from Idle to Full throttle..... the drivers side cam cover dose not produce vacuum it does the opposite, it vents the crankcase vapors into the throttle body boot. The throttle body dose not blow air/ and or vacuumed by the cam cover it does exactly the opposite.

an EV98 on the drivers side is useless.

 

Anyone care to second what Red92 just said?

The vacuum at idle or deceleration under the S/C is much greater then the small vacuum present in the rubber intake boot before the throttle body. Therefore air from the rubber intake boot will be vacuumed into the driver side cam cover, into the crankcase and exit out the passenger side PCV valve and then into the intake galley under the S/C. This air has passed the MAS so is metered. That is just the normal PCV setup in any vehicle, even those without a S/C.

The driver side cam cover only vents when the passenger side PCV valve loses all vacuum due to acceleration.

Vacuum can travel from cam cover to cam cover through the crankcase, what happens to the boost pressure at WOT that is on top of the stock PCV both-way valve? See step #1

NoSurprise

 

No Surprise, remove your filter, start the truck and while its idleing put your finger over the hole that leads to the drivers side cam cover. Do you feel any vacuum?

that small vacuum present in the rubber intake boot is the engine breathing..........not exhaling into the cam cover?, the truck would die?

It vents crankcase vapor while the engine is running period., crankcase vapor is assited with vacuum at idle and vents on its own due to acceleration or increased RPM.

IE positive crankcase ventalation.... PCV system, not sucking air into crankcase SAC Oil vapors being positively pulled into the intake system is why we are having this civil discussion.


BTW the swanson kit is keeping oil out of my throttle body (thanx for the recommendation) and I have a separator just after my 03 cobra pcv so it catches any oil vapor that may go to the intake galley under the supercharger. So far I have not seen any oil in my intake boot from the drivers side cover and I checked it about a week ago when I install a 15" AFone cone filter. My truck has 3K on it.

 

best price for the oil seperator is Motor city mods, basically a water catch tube for an air compressor.

te best price for the swanson kit is a DIME and buy the $4 valve at ford.

 

Do they have a website?

 

I got both my seperators at autozone.