PCV oil catch can/separtor

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by Cowpie, Jul 2, 2013.

  1. Cowpie

    Cowpie Member

  2. j cat

    j cat Active Member

    with this separator one end goes to the pcv and the other to the throttle body ? any oil getting by the pcv is captured in the separator and is not sent to the / thru the throttle body.

    with this being a new vehicle did the separator catch any oil ?
  3. Cowpie

    Cowpie Member

    You got it. This filter goes between the PCV outlet in the driver's side valve cover and the intake manifold. On the 5.3L in the Silverado, the inlet to the manifold is on the very top and not thru the throttle body like on some of the cars. Just put it on last night, so too soon to see any results.

    Will see how much is getting caught by this system. Whether the vehicle is old or new, oil in some measure always gets transported right along with the gasses that are drawn up thru the PCV. Will post pics at various intervals showing how much is being caught. I am cognizant of the fact that this particular brand of setup may not do as well as I hoped. I am looking at a couple of other units if this one does not do well. There are several folks on other forums that have had excellent results from this one, so I decided to give it a try.

    - - - Updated - - -

    Decided to go out and take a pic. Put about 130 miles on the pickup since last night. Here is the oil the filter took out of the PCV system just in 130 miles......

    IMG_2494.jpg
  4. BigBlueLB756

    BigBlueLB756 New Member

    Is nice.
    I like.
  5. KyleZ71

    KyleZ71 New Member

    How long did that take? I wouldnt mind doing something like that myself

    - - - Updated - - -

    Guess I should read more next time
  6. Cowpie

    Cowpie Member

    Got a feeling this thing is going to catch a lot of oil riding along with the crankcase gasses. This is after just over 200 miles.....

    IMG_2495.jpg
  7. buckmeister2

    buckmeister2 New Member

    questions about oil separator hookup

    I have on '01 5.3 with 180K on the speedo. I would like to do this, but have a couple questions. First, the tube mine has is a hard tubing, feels like it might be metal, with a soft rubber cover over it. Did yours have that? I had never checked it before, and would have thought it would just be a stout rubber hose, but there is definitely an inner core. I don't know if I want to cut that core, and mess with plumbing a rubber hose to it on both sides. Second, looking at the setup you have, why could you not use a good-quality air compressor oil separator? they are rated to 140 psi, and I don't think the PCV hose is pushing that kind of pressure. Any thought on both of these questions? thanks
    Last edited: Jul 6, 2013
  8. KyleZ71

    KyleZ71 New Member


    Do you have it mounted by only zip-ties?

    - - - Updated - - -

    I had to check mine because of what you said and I too have the inner core
  9. Cowpie

    Cowpie Member

    Yep. I just mounted it to the brake master cylinder reservoir by zip ties. I wasn't looking for something fancy. This is a truck that can't stay clean for 24 hrs. Good 'ol farm/rural pickup that doesn't go to truck shows and such. The ties are working just fine. The unit has a bracket for a more permanent installation. I am waiting to see if this unit is a long term thing, or if I need to go with something else. No use doing a major installation until I know for sure. So far, I am optimistic.

    One could use an air compressor filter thing as long as the filter portion is rated for petroleum and solvents. Many air compressor separators are primarily used for water separation. Do your due diligence. Since the total cost to do this would not be much of a difference between the Jegs unit and the proper air compressor unit, it almost seemed ridiculous to quibble about pennies on the install. If we were talking about this and one of those $140 catch cans, it would mean something.

    I did not have any inner core to the stock hard PCV hose. Just stiff plastic. Easy cut and insert job.
    Last edited: Jul 7, 2013
  10. Goldie

    Goldie New Member

    Does this do anything to improve performence or increase mpg's? After adding a set up like this, should something be done to clean the intake manifold?
  11. BigBlueLB756

    BigBlueLB756 New Member

    Keep that engine clean. Burn gas, not oil (unless you've got a diesel!).

    [​IMG]
  12. buckmeister2

    buckmeister2 New Member

    oil separator benefits

    performance improvement would be dependent upon your engine. A really hi-performance, high compression engine will benefit more, as the oil that is getting put back into the combustion chamber with the fuel is reducing the octane power of the fuel. Separating the oil out from the fuel gives you cleaner fuel, which will burn better. Even in a stock LS motor, there will be benefit, but it may be small, as in just a few horsepower, or a tenth or two of one MPG. Your engine will breathe cleaner, regardless, and ultimately run a bit better. if your engine tends to "ping" or detonate only on rare occasions, the separator might fix that, as the oil in the fuel is reducing the effective octane rating, which can cause detonation. Now, my only question is about that core inside my PCV hose. Earlier models of the 5.3 have a PCV hose that is rubber on the outside, but some kind of hard core inside. I have not removed mine to see what it is. does anyone know if that is just another rubber hose? I don't want to cut mine if it is a metal core.
    Last edited: Jul 9, 2013
  13. Pikey

    Pikey Moderator Staff Member

    I am considering doing this. I may spot by my old job and see if my old boss has any small Norgren separators laying around.
  14. KyleZ71

    KyleZ71 New Member

  15. buckmeister2

    buckmeister2 New Member

    oil separator

    So, Kyle...that harder core inside is just black plastic tubing, wrapped on the outside with rubber insulator hose? that is what the "early" instructions looked like. Have you cut yours yet to see? Jim
  16. KyleZ71

    KyleZ71 New Member

    I actually installed my Moroso unit yesterday.
    photo (6).jpg photo (5).jpg photo (4).jpg
  17. Goldie

    Goldie New Member

    Hey Cowpie -
    Any further thoughts on how your Jegs is working out? What other units are you condsidering?Any difference in how your truck performs? You mentioned in your first post that you found information of this set at other forumds. Can you post what the forums are? Even though I have a 4.3L engine, I'd like to do some more research.
  18. Cowpie

    Cowpie Member

    The Jegs unit has already caught a fair amount of oil in the short time it has been on. I am quite surprised that so much oil is being brought along with the crankcase gasses into the intake. While the Jegs unit seems to be doing a good job, I primarily put it on to see if the idea that something was needed was reality. Well it is, so I am looking at a couple of other better units. One is the RevXtreme can and the other is a can sold by Corvette Custom Accessories.

    http://www.revxtreme.com/rx-catch-can-single-check-valve

    http://www.customcorvetteaccessories.com/oilcatchcan.html

    No way to really tell if any performance difference. I only had 1000 miles on the pickup when I did this. As for other forums, I got introduced to this idea on the www.silveradosierra.com forum under the 5.3L engine section and then just started doing web searches on other forums. Lot's of info out there to consume a lot of your time.
  19. Pikey

    Pikey Moderator Staff Member

  20. Cowpie

    Cowpie Member

    Yeah, I would agree! Does look a little cheesy. But I wanted to try something to see how much of this whole PCV oil thing was realistic or just a bunch of hooey. I am solidly convinced that this is a problem. I will be moving up to one of the top notch catch cans soon. Though the Jegs unit looks like a relabeled compressor unit, it sure has separated out a LOT of oil already. Better than nothing, I suppose, but I am moving up to something better, more than likely, the RevXtreme can.

    Since they got brought up a few posts back, I would sure like to see the internals of the Moroso cans to see how they are doing their thing. Anyone got any pics to share?

Share This Page