First of all, I have a 6.0 with L92 heads and a L76/LS3 intake with a LS6 valley cover.
To get the passenger's side valve cover to fit I had to remove the inside breather casting. This valve cover has only one breather tube, and it's toward the front of the motor.
The driver's side valve cover only has a hole for the PCV valve. That's it.
I've been told to run a hose from the valley tube to the intake port right next to the valley tube. One says I have to have a PCV valve in this hose, another says that the LS6 valley cover has a PCV valve in it. I was told that everthing needs to be sealed with no breathers, another says to put breathers in the valve covers.
Enough said? I don't know what's the best, or should I say the right thing to do.
I was planning on capping off the valve cover tube. But, after that I'm more then confused.
Thanks for any and all help you can give me.
Rob
on my 414 i have a breather on each valve cover and everything else is capped except the stuff on the back of the intake for the master brake cylinder and the a/c
First of all, I have a 6.0 with L92 heads and a L76/LS3 intake with a LS6 valley cover.
To get the passenger's side valve cover to fit I had to remove the inside breather casting. This valve cover has only one breather tube, and it's toward the front of the motor.
The driver's side valve cover only has a hole for the PCV valve. That's it.
I've been told to run a hose from the valley tube to the intake port right next to the valley tube. One says I have to have a PCV valve in this hose, another says that the LS6 valley cover has a PCV valve in it. I was told that everthing needs to be sealed with no breathers, another says to put breathers in the valve covers.
Enough said? I don't know what's the best, or should I say the right thing to do.
I was planning on capping off the valve cover tube. But, after that I'm more then confused.
Thanks for any and all help you can give me.
Rob
If you have a nice tight engine...no excessive blow-by. I think its best to suck crankcase gases from the passengers side valve cover vent port with a PCV valve in line to the lower intake vacuum port. Cap the valley cover port and the drivers side valve cover port. And cap the upper TB vent port.
My oil consumption "stopped" when I did this.
Sucking from the valley cover port allows a ton of oil to get sucked in from the crankcase mist. Sucking from the valve cover creates almsot no oil pull, but you still suck the same from the crankcase. If you want to, you can also put a vent/filter on the drivers side valve cover like I did. (pic below) That will allow a fresh air-flow right across the entire inside of the crankcase. Fresh air into the drivers side valve cover, and then it gets sucked out through the passengers side valve cover...simple as that.
***You have to do whats best for your engine. I have blow-by so this works great for me.****
.
__________________ 1998 WS6 T/A 492 RWHP//495 RWTQ (w/cats)
LS6 427ci LPE short block, Ported stock TB, Ported LS6 intake, Ported LS1 heads, cam: 244/244 .610/.610 114 lsa, 1 7/8" Grotyohan LT's, 3" custom "Y" back to a Magnaflow Muffler, Built tranny...by a friend, Strange 12 bolt, 3.73 gears, Baer brakes, Hotchkis STB, LG Motorsports: Panhard Rod, LCA's, SFC's, G2 Super Springs, Hals all around, 315/rear, 275/front
Life may not be the party we hoped for, but while we're here we might as well DANCE.
The motor isn't off the stand yet. Just did a complete rebuild, bored, new rings, bearings, heads, rods, and polished crank. Just want to get the PCV right from the start.
Thanks,
Rob
Location: In the garage, working towards a 2900 lb raceweight :D
Posts: 10,771
I wouldn't hook anything to the intake, and vent it via a couple filters and be done with it.
Putting oil into the intake, is never, NEVER a good idea. Even if you have blowby or none at all, a couple filters (one on the back of the drivers side head, and then T the passenger's side and the valley cover together and put a filter in the middle, or put a small filter off both locations) will allow the pressure to get out, and should work fine.
I put a set of aftermarket valve covers on my motor (nasty performance) and they had a -10an fitting on both, I ran a -10 line around the back to a T fitting, and then ran the -10 line up to a moroso vent can. I drain that on a regular basis, and oil is definitely getting caught in the can. I've had the motor running with the line off and the valve cover fittings open, and oil doesnt' come flying out, so all the oil that's getting into the can is airborne.... no way do I want that in the combustion chambers!
The motor isn't off the stand yet. Just did a complete rebuild, bored, new rings, bearings, heads, rods, and polished crank. Just want to get the PCV right from the start.
Thanks,
Rob
You'll have a nice tight engine with little or no blow-by. Do what I did in the first picture with a PCV valve....with no filter/vent on the drivers side valve cover. Cap that valley cover port.
LS6 valley cover ports suck a crazy amount of oil, cap it forever.
.
__________________ 1998 WS6 T/A 492 RWHP//495 RWTQ (w/cats)
LS6 427ci LPE short block, Ported stock TB, Ported LS6 intake, Ported LS1 heads, cam: 244/244 .610/.610 114 lsa, 1 7/8" Grotyohan LT's, 3" custom "Y" back to a Magnaflow Muffler, Built tranny...by a friend, Strange 12 bolt, 3.73 gears, Baer brakes, Hotchkis STB, LG Motorsports: Panhard Rod, LCA's, SFC's, G2 Super Springs, Hals all around, 315/rear, 275/front
Life may not be the party we hoped for, but while we're here we might as well DANCE.
Do what I did in the first picture with a PCV valve.
Your system isnt correct. Your makeup/clean air has to be metered by the MAF then drawn through the system and put back on the other side.
You essentially have made a vacuum leak, air is being drawn into the intake near the throttle body. But that air is being drawn, through your engine, from your open filter on your drivers side rear and not from metered MAF air like it should.
Thats why there is a "makeup/clean air" side and a "foul air" side to a PCV system.
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
What is the best, easiest PCV setup for my motor. I had to remove the baffeling from my only breather tube, on the right front valve cover. I have the LS6 valley cover, that I bought because of all the threads about it's a much better setup then the LS1. I found a part # for the LS6 PCV system, but it doesn't work anymore. I don't have any kind of PCV system right now. And, I'm totaly lost on what to do.
Thanks,
Rob
The PCV system is simple, and has nothing to do with the computer. A manifold vacuum fitting at the rear of the BBD pulls fresh air through the crankcase and out through the PCV valve into the intake manifold, where any vapors are burned instead of escaping to the atmosphere. Conventionally, a PCV system will include an oil separator, such as a series of baffles and chambers to change the velocity and direction of crankcase vapors prior to the crankcase vapors being fed to the combustion chambers for burning.
Your system isnt correct. Your makeup/clean air has to be metered by the MAF then drawn through the system and put back on the other side.
You essentially have made a vacuum leak, air is being drawn into the intake near the throttle body. But that air is being drawn, through your engine, from your open filter on your drivers side rear and not from metered MAF air like it should.
Thats why there is a "makeup/clean air" side and a "foul air" side to a PCV system.
SD tune. My MAF doesn't work.
This is a perfect system for my engine. Someone with a nice new "tight" engine with no excessive blow-by should have a sealed system to create vacuum in the crankcase.
.
__________________ 1998 WS6 T/A 492 RWHP//495 RWTQ (w/cats)
LS6 427ci LPE short block, Ported stock TB, Ported LS6 intake, Ported LS1 heads, cam: 244/244 .610/.610 114 lsa, 1 7/8" Grotyohan LT's, 3" custom "Y" back to a Magnaflow Muffler, Built tranny...by a friend, Strange 12 bolt, 3.73 gears, Baer brakes, Hotchkis STB, LG Motorsports: Panhard Rod, LCA's, SFC's, G2 Super Springs, Hals all around, 315/rear, 275/front
Life may not be the party we hoped for, but while we're here we might as well DANCE.
What is the best, easiest PCV setup for my motor. I had to remove the baffeling from my only breather tube, on the right front valve cover. I have the LS6 valley cover, that I bought because of all the threads about it's a much better setup then the LS1. I found a part # for the LS6 PCV system, but it doesn't work anymore. I don't have any kind of PCV system right now. And, I'm totaly lost on what to do.
Thanks,
Rob
Best way is to suck crankcase gases from your drivers side valve cover, 3/8" hose with a PCV valve in line. Connect that to the lower vacuum port on the intake. Cap everything else off, everything, espeically that horrible LS6 valley cover port. Whoever designed that LS6 valley cover port was an idiot.
If you want to, you could connect another 3/8" line from the top TB port to that valley cover port. At WOT that will "blow" fresh air into the crankcase through the valley cover port. (because you said your passengers side valve cover port is gone, otherwise connect the TB port line to the pass valve cover port)
Thats it.
.
__________________ 1998 WS6 T/A 492 RWHP//495 RWTQ (w/cats)
LS6 427ci LPE short block, Ported stock TB, Ported LS6 intake, Ported LS1 heads, cam: 244/244 .610/.610 114 lsa, 1 7/8" Grotyohan LT's, 3" custom "Y" back to a Magnaflow Muffler, Built tranny...by a friend, Strange 12 bolt, 3.73 gears, Baer brakes, Hotchkis STB, LG Motorsports: Panhard Rod, LCA's, SFC's, G2 Super Springs, Hals all around, 315/rear, 275/front
Life may not be the party we hoped for, but while we're here we might as well DANCE.
PCV system??? 
