Should you use a catch can (answer) YES!
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From: Orlando, Florida
Should you use a catch can (answer) YES! I didn't drain my catch can for a while on purpose, couple of power tours, track days and etc. I got around to cleaning it this week and poured a lot of oil out. WOW! I have a LS-6 valley cover and AMW can. If it wasn't for the can all that oil would be down my intake. If you don't have a can on your early LS motor you need to get to work.
My setup
My setup
He told you in the first post - AMW (Accurate Machine Works). I bought mine years ago before they implemented a huge price hike, but they are very nice catch cans. I've been running it ever since, and it still catches a fair amount of oil between changes.
On The Tree
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From: Lakeland, Fl
It is surprising just how much blow-by happens, especially when you are "hammering" it a little. All the more reason to be sure to mount it where the drain petcock is easily accessible...........or..........easily removable. Good Info!!
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Yeah, a CC is a good idea, and a must on a H/C/I engine. I run a ls6 vc, 2 CC, and a restrictor( with 1/16" hole) in the line going back into the intake. With all that I still drain around 4oz out of my larger CC every month. I do a lot of short/stop-n-go drives so I contribute the quantity a lot to that.
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thats alot of oil. good thing u had that there. looking at finish my oil catch can set up and cant find any one way check valves that r big enough for the lines where did u pic urs up at.
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From: Cartersville, Georgia
im not sure i see how this is plumbed. is it just a can in the line from pcv to intake? what advantages are there and what keeps you from just running breathers and plugging the lines? is this for emissions legal stuff?
not an ls, but on my old sbc i never ran a pcv. made a mess. im guessing you guys have to for some reason.
Tim
not an ls, but on my old sbc i never ran a pcv. made a mess. im guessing you guys have to for some reason.
Tim
im not sure i see how this is plumbed. is it just a can in the line from pcv to intake? what advantages are there and what keeps you from just running breathers and plugging the lines? is this for emissions legal stuff?
not an ls, but on my old sbc i never ran a pcv. made a mess. im guessing you guys have to for some reason.
Tim
not an ls, but on my old sbc i never ran a pcv. made a mess. im guessing you guys have to for some reason.
Tim
But yes....all you need are breathers and you can cap off all ports, then there's no way oil can go into the intake.
.
Last edited by LS6427; Oct 7, 2011 at 10:07 PM.
But I have a needle valve in the vacuum line so I can adjust how strong that vacuum is pulling on the crankcase gases. I also completely shut it off for about 1 year to see what would happen.....absolutely no change at all in anything. Vacuum is not needed, just breathers.
I used a cigarette while it was idling and the needle valve wide open and it sucks all the smoke right into that filter. Since factory vacuum strength is way too much, I have it set at about 1/2 that.....and not a drop of oil is in my intake.
.
It's something I've had for awhile. I've got a whole drawer full of miscellaneous, nuts, bolts, and small parts, I found it in there I think it might of been a carburetor part.
You can try using one of the newer GM truck PCV valves, except it's really just a vacuum restrictor, it has a really small hole in it(around 1/16" to 1/8" ), and nothing inside it. That might be all you need, if not then get a CC. I found that if you place the CC away for engine heat(I mounted one of mine below the passenger side headlight) it'll be even more effective at trapping crank case vapors.