Bryan @ Speed Inc.

iTrader: (19)

i use castrol start up... and use quite a bit of oil. but then agan i have a stoker that sees 3,000-3,500 cruising speeds very often. so i'm sure that has some effect on crankcase pressure.

FstBlkz28

iTrader: (13)

well i just bought and installed one of the new valves ... we'll see how it works. I wont be able to give an accurate assesment on how it works for another 2 oil changes tho ... i'll be changing it here in about a week, and will completely dry out my catch can so i can see if its catching less oil or the same amount.

FstBlkz28

iTrader: (13)

Ok well I've got about 400 miles on the new valve. The actual can part of my AMW catch can is still bone dry. But on the bottom of the filter element there is some oil residue that is starting to pool up. I've never checked my can in that short of an interval though, so this really doesn't give me any idea if this new valve is working any better. I'll keep checkin it though every 500 miles or so, and then at 5000 I'll be able to give a definite answer on how much better/worse it works.

bass685

iTrader: (10)

https://ls1tech.com/forums/showthrea...vented+oil+cap

These 2 should go together then?

keep us posted FstBlkZ28

bass685

iTrader: (10)

here's the picture and part number on the bag

z-ya

iTrader: (1)

GM had a TSB on that pcv valve,it was for trucks that hauled trailers alot and had high
oil consumption.It is just a fixed orifice no actual valve.

LS1-450

iTrader: (33)

This would be a wise option. Combining the cap w/ the small orificed PCV valve would ensure that the pressure has proper ventilation.

bass685

iTrader: (10)

Exactly what I was thinking

bass685

iTrader: (10)

hey FstBlkz28,
Any update on the oil situation?

Thanks

FstBlkz28

iTrader: (13)

I've almost got 2000 on the new valve. I'll pull my can today in between classes and check to see the level of oil. Maybe take some pics too.


How the hell would you mount the PCV vertically though? It seems like that would help too.

JoeyAnderson

iTrader: (20)

Great thread! I don't have a real consumption issue but when I swap on my LS6 intake I want to do some "preventative maintenance" involving the PCV system.

I'm eager for an update, FstBlk.

bass685

iTrader: (10)

Thanks FstBlkz28,
Really would appreciate it.

bshell

iTrader: (24)

A good upgrade would also be the LS6 valley cover. I've had mine on for 3 months now and have seen a substantial decrease in the amount of oil in my catch can.

bass685

iTrader: (10)

How much money in parts is required to convert to the ls6 valley cover/pcv set up?
Also what are all the parts required besides the cover itself


2001 Z28

MeentSS02

iTrader: (11)

Welp...just put my order in for the vented oil cap and PCV. I'll be doing a study on this as well...my car eats about 1-1.5 quart every 5K, and I always get about 1/4 cup or so of oil in my catch can during the same interval. We shall see...at least my intake stays fairly clean...before the catch can though Nasty.

bshell

iTrader: (24)

I don't remember the exact cost as I bought some other items at the same time. Should be $40 - $60 total. You'll need the valley cover and a plug for the drivers side pcv connection on the valve cover. I used the cap that came with the ls6 cover for the passenger side valve cover pcv connection. See ls1howto.com for the parts needed:
http://www.ls1howto.com/index.php?article=18
I did the valley cover while I was installing an ls6 intake. Don't let the cutting of the block worry you. I used a dremel and some cutoff wheels and made sure I covered the valley with towels and taped up the intake ports on the heads.
The ls6 pcv setup is a vast improvement over the ls1. Coupled with a catch can, it should solve most of the pcv related oil consumption issues.

FstBlkz28

iTrader: (13)

Alright guys ... I pulled my can and emptied the oil into a cup to give a better idea of how much oil is in there, this was after 2000mi. With the old valve, I would get just a hair under a 1/4 cup of oil in 5000.
Assuming there's a constant amount of oil getting let through this PCV, and the amount would be alil over double the amount right now, then it should be noticeably less than it was w/ the old valve. The line on the cup is the 1/4cup mark.


When I switched out the PCV valves I noticed that in the rubber boot that the valve sits in, there was a pool of oil. Considering the angle that my PCV valve sits at (downward towards the intake) and the fact that the bottom of this valve slopes into the hole (like a bowl with a hole in the bottom). If oil is pooling up at the base of the valve, its only a matter of time before it gets sucked into the hole. Here in about 2 weeks I will be changing out my oil, and plan to try and setup the PCV valve so that it has an UPWARD slant (if not completely vertically upward) so that gravity is working with the valve instead of against it (letting the oil fall into the hole after it pools).

Hope that helps guys

MeentSS02

iTrader: (11)

Thanks for the update...I'm gonna do this as well as the new LS6 valley cover...I can see being able to mount the PCV diagonally upwards without too much of a hassle...I'll see what I can come up with.

Is the hose from the front passenger side valve cover to the TB necessary? I'm sure that sucks some damn oil into my intake as well... I just don't know its purpose.

bass685

iTrader: (10)

is this the correct number fot the hose? i tried a few gm parts sites and came up with nothing?

10 inches of 5/16 ID Rubber fuel line from autoparts store OR 1x GMPN 12568010

Thanks

bshell

iTrader: (24)

I just went to my local auto parts store and got the rubber fuel line. I don't think GM sells just the rubber pcv line anymore.