Jump to content

J&L OIL SEPARATOR CO

GAMark

By GAMark
in 6.6L Gas V8 (L8T)

 Share

Recommended Posts

GAMark Enthusiast

GAMark

Posted
Posted (edited)

Catch can added last night. Will add pics later.

Catchcan.jpg

Catchcan1.jpg

Edited by GAMark
  • 2 weeks later...
riddler Enthusiast

riddler

Posted
Posted
On 5/13/2026 at 6:26 AM, GAMark said:

Catch can add last night . Will add pics later.

Catchcan.jpg

Catchcan1.jpg

I have about 15k miles on my install definitely catches fuel/ oil burpup

  • Like 1
TrueBlue Enthusiast

TrueBlue

Posted
Posted

Question on this. If the Separator is between the intake manifold and the left valve cover, but the PCV valve hooks directly from the right valve cover to the air intake tube, isn't that latter process still adding oil vapor from the oil pan/crankcase into the intake valves?

Pryme Senior Enthusiast

Pryme

Posted
Posted
1 hour ago, TrueBlue said:

Question on this. If the Separator is between the intake manifold and the left valve cover, but the PCV valve hooks directly from the right valve cover to the air intake tube, isn't that latter process still adding oil vapor from the oil pan/crankcase into the intake valves?

There are multiple very long threads on this contraption. A quick search will give you plenty of reading to decide if it’s right for you. 

TrueBlue Enthusiast

TrueBlue

Posted
Posted

I've read a few. I just don't think my question has been answered. I find it hard to understand how the catch can can be capturing all of the vapor when it isn't in line with the PCV.

Pryme Senior Enthusiast

Pryme

Posted
Posted (edited)
10 hours ago, TrueBlue said:

I've read a few. I just don't think my question has been answered. I find it hard to understand how the catch can can be capturing all of the vapor when it isn't in line with the PCV.

It’s my personal opinion that the only one benefiting from this is the manufacture. It’s completely unnecessary. 

Edited by Pryme
  • Thanks 1
TrueBlue Enthusiast

TrueBlue

Posted
Posted

Given the fact that there appears to be two separate routes for the vapors to travel back to the intake valves I would tend to agree. If there was only one, and the can was in line, between the pan and the intake I would be much more inclined to equip my truck with one of these.

There is no doubt that direct injection does result in carbon build-up on the valves. What is needed is a way to avoid this entirely. As well as that which comes from unburned oil vapors. But until the next technological break-through I guess we're stuck with the issue, or both.

The thought of tearing the top end of my engine apart in order to blast the valves with walnuts or some such is not a welcome one.

riddler Enthusiast

riddler

Posted
Posted
17 hours ago, TrueBlue said:

I've read a few. I just don't think my question has been answered. I find it hard to understand how the catch can can be capturing all of the vapor when it isn't in line with the PCV.

It may not be capturing all of it, it does capture a good amount. Im glad I installed mine early, hopefully it will slow down valve carbon build up.

riddler Enthusiast

riddler

Posted
Posted
4 hours ago, TrueBlue said:

Given the fact that there appears to be two separate routes for the vapors to travel back to the intake valves I would tend to agree. If there was only one, and the can was in line, between the pan and the intake I would be much more inclined to equip my truck with one of these.

There is no doubt that direct injection does result in carbon build-up on the valves. What is needed is a way to avoid this entirely. As well as that which comes from unburned oil vapors. But until the next technological break-through I guess we're stuck with the issue, or both.

The thought of tearing the top end of my engine apart in order to blast the valves with walnuts or some such is not a welcome one.

You make a good point. I will look at the probability of installing 2. Possibly capturing all of the vapors. 

TrueBlue Enthusiast

TrueBlue

Posted
Posted (edited)

You might want to talk to a mechanic about that. if the PCV inlet to the airbox happens to be upstream of the MAP sensor it might cause an issue. Or possibly if putting the catch can in line between the valve cover and the intake might result in what would amount to a vacuum leak?

Edited by TrueBlue
riddler Enthusiast

riddler

Posted
Posted

Yes I was speaking more tongue and cheek. Only time and miles will tell if the catch can works. I have 31k miles. I figure it is worth the money spent if it slows the carbon process.

 

If not well I can forward my knowledge on to others.

  • Like 1
Pryme Senior Enthusiast

Pryme

Posted
Posted
12 minutes ago, riddler said:

Yes I was speaking more tongue and cheek. Only time and miles will tell if the catch can works. I have 31k miles. I figure it is worth the money spent if it slows the carbon process.

 

If not well I can forward my knowledge on to others.

Do you have a second truck that you will drive next to the catch can truck to compare the two? More of a joke but there is no way to compare how yours is stacking up to a truck without the can. 
 

these trucks are used and abused by companies for a couple hundred thousand miles all day long. None of them have a catch can. 

riddler Enthusiast

riddler

Posted
Posted
3 minutes ago, Pryme said:

Do you have a second truck that you will drive next to the catch can truck to compare the two? More of a joke but there is no way to compare how yours is stacking up to a truck without the can. 
 

these trucks are used and abused by companies for a couple hundred thousand miles all day long. None of them have a catch can. 

There are plenty of owners here not using the CC to compare too. You obviously arent what truck do you drive? Miles?

riddler Enthusiast

riddler

Posted
Posted
Just now, riddler said:

There are plenty of owners here not using the CC to compare too. You obviously arent what truck do you drive? Miles?

Man if I get 200k out of this motor, i cant ask for anything more!

  • Like 1
TrueBlue Enthusiast

TrueBlue

Posted
Posted

Well, if the can catches any vapor at all, that it turns into liquid, it should amount to a lesser buildup on the valves. Or so I would think. I just don't know to what extent it might amount to.

I installed a catch can on my 2018 Fat Boy, and I did have to empty it from time to time. That small amount would have been sent straight into the throttle body, so I know it was doing at least some good. I would think the same would apply here.

Some of us like to hedge our bets. Especially given that we don't get to write our "investment" off like some companies do.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,825
    Total Members
    8,960
    Most Online
    phillja
    Newest Member
    phillja
    Joined

  • Who's Online   5 Members, 0 Anonymous, 864 Guests (See full list)

  • Latest Articles

  • Posts

    • Grumpy Bear
      Gas Prices

      By Grumpy Bear · Posted

      If we actually used any significant amount of that source in the USA then I'd agree but we don't. We've had that discussion before. We drill and pump more than we use. Thing is, we sell. We export. Gas and Crude. It's more profitable so any shortage here is self inflicted and LEGAL.    I worked a gas plant that has multiple fuel sources available and I worked in the furnace and boiler plant in that facility. I'd had days we swapped fuel types four times in a twelve hour shift which isn't done on supply but on margin. Two of the fuel sources are internally generated. Tail gas and DAK, both of which are sold as well a consumed. We always had more than we needed to run the process but we chose the fuel that produced the best margin not bought at the cheapest price always. A good bit of math to that and back in the time that was done on a slide rule.     I worked the Shale Oil Semiworks of Chevron Research and CONOCO Research in Salt Lake City. That process never went into production although it was very successful. Why? Did we lack oil bearing shale? Nope. Price of crude never made the margins work. That was in the late 70's early 80's. Remember history? What was happening then was a reaction to that situation. It didn't drive it. If so then it's easy. This isn't a supply and demand thing. This is a profit and margin thing and AI rules that now.    In no refining situation that I was ever in would a bomb hitting a well anywhere in the world 'instantly' interrupt or even distress the supply. Most plants have more than a months worth of crude in the tank field and more in pumping stations. That yo-yo could play out over days, weeks and maybe months and have zero impact on plant operations. How many times has this been off and on in the last few months? These people and not stupid. These plants measure down time in hundreds of thousands of dollars per day. They are not sucking fumes or waiting on the next truckload with baited breath. Besides, as I noted, they are for the most part 'vertically integrated'. They own it from the dirt is sits in to the delivery rack and sometimes to the pump. It has a HUGE shock absorber built in. When production suffers, refining wins and when refining is winning exploration is killing. The rest of that crap in the news is a 'news cycle'. Government dipping in to reserves? Oil is stealing their milk money. There's a reason Chevron abandon Venezuela infrastructure and it had nothing to do with security of US citizens. Nationals run those plants. it has to do with MARGINS disappearing to corruption. They are in no hurry to return. Is there supply there? Oh yea. More than enough to offset what is bought in the middle east. Just isn't ???? Profitable.    We have supply. There are places in Illinois you can drive a pipe into the ground and run your homes natural gas furnace on it.    A refinery fire will gum up the supply works but not a localized war where the market is using a limited supply from. Now Europe, that's something other....
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      $4.00 a gallon here now.   Diesel nearly $5.00 again.
    • Atlas
      Gas Prices

      By Atlas · Posted

      If we're talking futures, yes, it's speculation.   The spot price of a delivered barrel is elevated now compared to before the conflict. And that is related more to current supply/demand.
    • Grumpy Bear
      Gas Prices

      By Grumpy Bear · Posted

      SPECULATION on the wars effect raised prices. AI is maximizing the profit. Refining is vertically integrated. 
    • Atlas
      Gas Prices

      By Atlas · Posted

      It's the Middle East conflict that raised prices, not AI. But nice distraction.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...