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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 03-20-2007, 01:19 PM   #1
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Default LS6 Valley Pan vs. Catch Can?

Did the LS6 Valley Pan mod to my 2002 LS1 block. Is there any need for a catch can now? I have noticed a smaller amount of oil/gas mix in my intake since I did the mod. The LS6 Valley Pan has the nipple coming out of the fron of the block next to the nipple on the intake, and I've simply connected a hose to the two nipples.

What are you guys doing?
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Old 03-20-2007, 03:17 PM   #2
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I have a hose off the valley cover to the top of the catch can then off the side of the AMW can back to the PCV valve right before the intake. Using the truck PCV valve. Very little oil loss but I do have to dump the catch can every 4 months or so. When I empty it, it's a very small amount, maybe 3 tablespoons worth. I also keep 6 quarts in it at all times. I followed the picture from ls1howto.com and inserted the catch can in-between.

Are you at least using the PCV valve? From your description it sounds like you have a 10" hose looped from nipple to nipple.
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Old 03-20-2007, 03:51 PM   #3
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Even after I swapped to an LS6 Valley cover, I still kept my catch can on. Tried the truck PCV valve, and it whistled (wasn't having any of that) and still spat oil in my catch can. Switched back to the stock style PCV valve (check type), and it still spits a little oil, but at least it doesn't whistle. I get about a tablespoon of oil in my catch can per oil change interval....

Bottom line - I'd recommend keeping it on there. My overall oil consumption is way down, but I don't know if I'd attribute that to any one thing...probably a combination of everything I've tried.
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Old 03-20-2007, 03:56 PM   #4
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Quote:
Originally Posted by MeentSS02
Bottom line - I'd recommend keeping it on there. My overall oil consumption is way down, but I don't know if I'd attribute that to any one thing...probably a combination of everything I've tried.

I'd agree with Meent...I'd keep the can. I haven't done the LS6 VP mod, but I did invest in a NLP can and it really helped my consumption. I usually empty it with each oil change...
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Old 03-20-2007, 04:47 PM   #5
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MeentSS02

Can you describe your setup, like location of PCV etc?
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Old 03-20-2007, 04:59 PM   #6
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Worth 1000 words:

Click the image to open in full size.
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Old 03-20-2007, 05:03 PM   #7
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So you have no PCV valve and elected to go with breathers. Interesting.

And damn clean engine bay, I get a lot of road dust and grit from our spring flower and corresponding activities, the orange barrel.
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Old 03-20-2007, 05:18 PM   #8
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Click the image to open in full size.
Click the image to open in full size.
I went with the LS6 valley cover with PVC and a breather and have no oil in the intake and the car is a dailey driver ... 30,000+ miles a year ..
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Old 03-20-2007, 05:30 PM   #9
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Quote:
Originally Posted by Viper
So you have no PCV valve and elected to go with breathers. Interesting.

And damn clean engine bay, I get a lot of road dust and grit from our spring flower and corresponding activities, the orange barrel.
Actually, there is a PCV valve in there...it is in the middle of the line that goes to the top of the catch can. So I have the LS6 valley cover, a PCV valve, and a catch can. I don't worry about any unmetered air from the breather since, as you'll notice, there is no MAF sensor in there anywhere.

As for the clean engine bay...thanks, but I think my camera was being flattering today. It really is pretty dirty Plus I just got done installing that EWP...
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Old 03-20-2007, 05:30 PM   #10
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OK, I've seen the PCV valve before a catch can and afterwards.
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Old 03-20-2007, 06:02 PM   #11
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OK, I'm really beating a dead horse here but I'm getting confused.

It has been so long since I converted to the LS6 setup I forgot how the original LS1 PCV setup goes.

But on ls1howto.com, they show the PCV right before the nipple on the intake. So it loops out of the valley cover, to the PCV fat end and the thin end of the PCV valve goes right to the intake. Like slt200mph. On MeentSS02, it is right as it comes off the valley cover.

Which is right?
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Old 03-20-2007, 06:11 PM   #12
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Quote:
Originally Posted by Viper
OK, I'm really beating a dead horse here but I'm getting confused.

It has been so long since I converted to the LS6 setup I forgot how the original LS1 PCV setup goes.

But on ls1howto.com, they show the PCV right before the nipple on the intake. So it loops out of the valley cover, to the PCV fat end and the thin end of the PCV valve goes right to the intake. Like slt200mph. On MeentSS02, it is right as it comes off the valley cover.

Which is right?
Not sure...I've run mine both ways, and it doesn't seem to matter.
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Old 03-21-2007, 06:08 PM   #13
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After lots of reading, I switched it a little. I put the fat end of the PCV right off the valley cover. In case any one reads in the future.
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Old 03-21-2007, 06:14 PM   #14
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Quote:
Originally Posted by slt200mph
Click the image to open in full size.
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I went with the LS6 valley cover with PVC and a breather and have no oil in the intake and the car is a dailey driver ... 30,000+ miles a year ..
god dang i love those valve covers where u get em???? sorry for the but i been looking for somthing like that to justify relocating my coils!!! and a catch can where do i get one??
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Old 03-21-2007, 06:49 PM   #15
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SDPC has them
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Old 03-21-2007, 10:27 PM   #16
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This whole catch can thing is kinda new to me.. I have a question. If you keep up with your cars maintenance like you should, and change the oil and or check it regular, why would you need one??? Is it bad for the engine?? Or what?

Sorry for the questions, just trying to find out the benifit of having one..

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Old 03-22-2007, 08:03 AM   #17
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Quote:
Originally Posted by mcamarols1
god dang i love those valve covers where u get em???? sorry for the but i been looking for somthing like that to justify relocating my coils!!! and a catch can where do i get one??

Thank you for the kind words....The valve covers are GMPP parts you can find them in the GMPP catalog.
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Old 03-22-2007, 11:10 AM   #18
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Quote:
Originally Posted by crazylane
This whole catch can thing is kinda new to me.. I have a question. If you keep up with your cars maintenance like you should, and change the oil and or check it regular, why would you need one??? Is it bad for the engine?? Or what?

Sorry for the questions, just trying to find out the benifit of having one..

Lane
These cars are known for pulling oil into the intake manifold through the PCV system...having the catch can in there really helps cut down on that. If you get a chance, pull your throttle body off and look inside your manifold with a flashlight...if you see oil in there, that's not a good thing.
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Old 03-22-2007, 11:30 AM   #19
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Will the F.A.S.T intakes still fit with this mod?
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Old 03-22-2007, 11:37 AM   #20
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Quote:
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Will the F.A.S.T intakes still fit with this mod?
Sure will.
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Old 03-22-2007, 11:37 AM
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