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Catch Can 2024 2500 HD

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Pryme Senior Enthusiast

Pryme

Posted
Posted
2 hours ago, lineman1234 said:

As i did an oil check and catch can check yesterday. I hadnt check either since my last travel day north towing the 5ver. So 8 days. The can was almost full of the normal oily tan water mix. Fullest i have seen it so far. I should have take  a pic but i was so surprised, i just dumped it and put it back on. 

 

So the best time for it/the can to do something seems to be colder weather as it sucks out moisture. Colder being very, very upper Minnesota weather. Summer very little moisture but oil vapor from pcv valve adds up at the bottom of the can.  

      The moisture burns off at some point anyway, without a can, but dumping a good cup of water stuff before it burns off cant be a bad thing. 

If it was catching incomplete oil wouldn’t it be constant regardless of the weather conditions outside? 
 

so if it was almost completely full in a week what happens when a guy gets bored with this little process and forgets to check it? Is it able to overflow out?

Another JR Senior Enthusiast

Another JR

Posted
Posted
8 hours ago, Pryme said:

If it was catching incomplete oil wouldn’t it be constant regardless of the weather conditions outside? 
 

so if it was almost completely full in a week what happens when a guy gets bored with this little process and forgets to check it? Is it able to overflow out?

Venting your catch can to the atmosphere with an overflow drain would cause its own issues, right?  Mess. Unmetered air. I suspect it is not vented and just begins slowly releasing that latte-colored water into the intake.  

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lineman1234 Enthusiast

lineman1234

Posted
Posted

Doesnt the pcv valve only go one way. To vent out. The vent out goes to the drivers side valve cover. So anything that is trapped in the factory tube, over time, goes in liquid form into the valve cover, like a full can would, if never emptied. Or in mine its mounted higher than both valve and cover, so it would just slosh over and down the tube into the valve cover putting the liquid back into the system like not having a can anyway. 

BCGM Enthusiast

BCGM

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  • Author
Posted

Thanks for all the replies fellas ! I need to look under the hood and see exactly where all these parts are , Would anyone have a diagram to show me what's what !

Or should I just look at the links you have provided ? My apoligies I'm tired tonight  I will check back  in a day or so 

Again Thank You 

BCGM Enthusiast

BCGM

Posted
  • Author
Posted
On 3/12/2025 at 8:07 PM, BCGM said:

Thanks for all the replies fellas ! I need to look under the hood and see exactly where all these parts are , Would anyone have a diagram to show me what's what !

Or should I just look at the links you have provided ? My apoligies I'm tired tonight  I will check back  in a day or so 

Again Thank You 

I  would be happy if someone could post a photo or technical drawing of the LT8 and where this catch can would hook into ie.hoses etc.

thank you 

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