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Catch can VS. Ls6pcv

This is a discussion on Catch can VS. Ls6pcv within the General Help forums, part of the LSx Technical Help Section category; I would like some help with some info. I have a 99T-A and have a oil leak somewhare and was ...

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    Senior Member kingls1's Avatar
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    Catch can VS. Ls6pcv

    I would like some help with some info. I have a 99T-A and have a oil leak somewhare and was doing some reading and see it could be a few things from sending unit to rear seal. In my research I came across the Ls6 conversion and the catch can unit. My ??? is this will the catch can do the same as the Ls6 conversion and can I do the catch can for now to help with crank case pressure? I don't want to tear into the motor now summer's almost here!!

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    ls1 powered seabee sutie's Avatar
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    in my opinion, the best option to go for, not only to keep crankcase pressure and blowby under controll, but to clean up the engine is to use a catch can in cunjuction with the LS6 valley cover conversion. there are lots of people with one or the other, i opted for both and love it.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by sutie View Post
    in my opinion, the best option to go for, not only to keep crankcase pressure and blowby under controll, but to clean up the engine is to use a catch can in cunjuction with the LS6 valley cover conversion. there are lots of people with one or the other, i opted for both and love it.
    did you noticed if your idle got better?

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    ls1 powered seabee sutie's Avatar
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    Idols much better, went from 500 to a consistent 800. No surging.
    LS1, SLP lid, SLP MAF, bilstein HP shocks, SLP longtube/tuned headers and loudmouth exhaust, built 4L60E w/ transgo shift kit, true ram air, ported TB, LS6 intake, LS6 PCV w/ catch can, FAST fuel rails, LCRB, sub-frame connectors, wide-band O2.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by sutie View Post
    Idols much better, went from 500 to a consistent 800. No surging.
    thats the problem i got with mine it surges, not too bad but I replace the hoses and check for leaks and nothing. I will consider doing this mod now. Thanks.

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    Spaz is My Mentor SMWS6TA's Avatar
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    I'm telling you Jay it's worth it.

    In regards to my idle, mine still idles at 1k rpm. Not sure why, I've adjust my idle screw and it has come down from 1200 rpm. I can't take anymore out. But it does idle smoother since the mod has been do.

    I need to find a way to verify what the tach is reading.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    I'm telling you Jay it's worth it.

    In regards to my idle, mine still idles at 1k rpm. Not sure why, I've adjust my idle screw and it has come down from 1200 rpm. I can't take anymore out. But it does idle smoother since the mod has been do.

    I need to find a way to verify what the tach is reading.
    lol are you a reading my mind? I just PM you asking about it lol

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    Spaz is My Mentor SMWS6TA's Avatar
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    ^^

    I had long ass post for the op about the benefits of the LS6 VCT mod and catch can, but I see it didn't post. Now I have to try to remember all that I typed.

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    Senior Member JayTA98's Avatar
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    all right im doing this mod. Im reading the thread about it to make sure of everything I need. Did you got the KS's and KS harness as well? i need to get all the part number together

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    Senior Member kingls1's Avatar
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    Iam not sure my ? was answered alot of talk about other things any help please post, I will check back.. Any thoughts on the best can??

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    Senior Member kingls1's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    ^^

    I had long ass post for the op about the benefits of the LS6 VCT mod and catch can, but I see it didn't post. Now I have to try to remember all that I typed.
    I would like to here some more

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    ls1 powered seabee sutie's Avatar
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    Quote Originally Posted by kingls1 View Post
    Iam not sure my ? was answered alot of talk about other things any help please post, I will check back.. Any thoughts on the best can??
    A Can will not do the same as the ls6 by itself, but will help a lot! Both are great mods, they just compliment each other well. I use a can from ws6 store, another good one is from ky speed, a site sponsor.

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    Senior Member kingls1's Avatar
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    Quote Originally Posted by sutie View Post
    A Can will not do the same as the ls6 by itself, but will help a lot! Both are great mods, they just compliment each other well. I use a can from ws6 store, another good one is from ky speed, a site sponsor.
    Thanks for the info, I plan on the ws6 upgread for now just want to enjoy and keep the wife happy not to see my new toy all ripped appart can ya hear me!!

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    ls1 powered seabee sutie's Avatar
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    haha, you have to ease her into it...sometimes its best not to tell her. its easier to ask for forgivness then to ask for permision. oh, and hide your reciepts!!

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    Spaz is My Mentor SMWS6TA's Avatar
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    OP here's what I tried to post earlier

    Quote Originally Posted by kingls1 View Post
    I would like to here some more
    I hope this can answer your questions:

    Our cars have a crappy PCV system that over time can cause oil/vacuum leaks. IMHO GM screwed the pooch (<us) by using this is a POS PCV system and on top of it, over charging us ($85-$140 depending on where you get it) for when you need to replace it.

    The PCV setup runs from the rear of the driver’s side valve cover behind the intake where it splits, one tube goes to the passenger valve cover the other comes along the passenger side of the intake into the PCV valve then into your intake. In the pics below you can see where it cracks and leaks.







    Pic below shows the quick fix for the PCV, it is in the Tech Section)



    You can spend the $85-$100 to get OEM that will in time need to be replaced again or you can do this:

    Part #: VCT - 12577927

    LS6 VCT (Valley Cover tray mod) with a catch can. Some like it some don't. This is not a performance mod but it does help get the oil out of the intake. It deletes the PCV tubing and puts the PCV under the VCT and moves the outlet port to the front of the engine underneath the TB. It moves the PCV away from a direct source of oil (valve covers) and moves it underneath the VCT. It still relives the crank case pressure, just doesn’t force as much oil into the PCV.

    This mod cost about $58-$75 for the VCT and about 2-3 hrs of time. The catch can goes for $50-$220 depending on what you want for style and function. Some get twin catch cans, bigger, smaller; meaning you have options.



    Catch can – its function is to filter the air/oil mix that blows by the PCV. By design, GM had the blow by go into the intake and then it would burn off. However most of the time it clings to the intake and over time begins to rob it of air flow and gunk up the pistons and such.




    In the pic below it's been about 6 weeks since I did the LS6 VCT and installed a Catch Can.

    I wanted to see how much oil it had caught. I drained it into a cup and was a little surprise by just how much oil I had.





    Prior to this mod I had to use a ¼ quart of oil every month. It’s been over 2 months and I’ve yet had a “check oil” light come on.


    Couple of more things to think about when doing the LS6 VCT mod or an intake swap:


    The OPSU is the tall plastic piece that is sticking up with the green cap.


    (you can also see in this pic just how much oil was getting by the OEM PCV. This pic was taken prior to me doing the LS6 VCT mod. My LS1 Intake also had as much oil on the inside.)



    These can get brittle and break over time. Also when you are messing with the intake most first timers break it because they don't know it's there. These can leak quite a bit of oil. Signs of this are oil coming down the backside of the engine over the bell housing. It is commonly mistaken for a rear main seal leak.

    99’-02’ Knock Sensors – 98’ and older GM is no longer making, If you’re like me you will need to upgrade to the 99’-02’ KS sensors (x2) and wire harness. Even if you have a 99’-02’ KS it is still a good idea to replace them. Remember it’s better to do it now while you have everything off then have to come back later.

    Part #’s”
    KS (x2) - 12589867
    KS harness – 12601822


    Hope this helps.

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    Member TransAmX2's Avatar
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    Quote Originally Posted by sutie View Post
    haha, you have to ease her into it...sometimes its best not to tell her. its easier to ask for forgivness then to ask for permision. oh, and hide your reciepts!!
    My tactic is to take on a handful of items on the "honey do" list the weekend I order the parts, then explain as they come in that next weekend is work on the car weekend. Has worked so far. I also practice "if it's worn out or broken upgrade it".

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    ls1 powered seabee sutie's Avatar
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    nicely done, i do the same thing!

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    Senior Member kingls1's Avatar
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    Very cool, This is my first toy like this I always had bikes she did not pay to much attention!!Iam sure it all works the same

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    Runa a catch can IMO
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