What Is A Oil Catch Can?

[Backes07]

So I see people talk about BT oil catch cans, or just people talking about oil catch cans and I'm wondering what exactly do they do? kind of a dumb question I'm sure but I am just wondering their exact use?

[Savior84]

Via the "How do I......everything" thread:

http://www.chargerforums.com/forums/...d.php?t=106028

[MotoAce51]

I just bought one myself. I have no idea how well they work but we will see.

Anyways, to sum it up a little: There is oil that goes through the PCV valve and back into your intake. The catch can is put in series with this line so the oil is caught in the can and not directed back into the engine. Think of it as a accumulator in a compressor in the garage. It is designed to catch the water so it doesn't go into the motor. Fluid goes in & only air comes out.

[370 HEMI]

Originally Posted by MotoAce51

I just bought one myself. I have no idea how well they work but we will see.

Anyways, to sum it up a little: There is oil that goes through the PCV valve and back into your intake. The catch can is put in series with this line so the oil is caught in the can and not directed back into the engine. Think of it as a accumulator in a compressor in the garage. It is designed to catch the water so it doesn't go into the motor. Fluid goes in & only air comes out.

Different type oils have varying vapor thresholds.

What this means is that depending on the point the oil goes from liquid to vapor determines how much oil...and water is going to end up in the catch can. Think of it as boiling point of the oils.

The best way to think of it is like water. At one temperature it is a solid. At typical temperatures above 32 degrees F it is liquid. It remains a liquid until it hits vapor threshold and at 212 degees F it goes to vapor.

It then gives off it's "latent heat" and turns back into a liquid and runs down your windows in your house etc.

So likewise, oil "volatility" reacts to the refining heat that comes from your engine and goes from a liquid to a vapor and while going up the tube gives off the latent heat and turns back into a liquid and condenses into your catch can....leaving the fuel vapors and combustion byproducts to go back into your intake, burned and out the exhaust.

Regards,
Brian
BND Automotive LLC
440-821-9040
www.bndautomotive.com

[hothouse]

The best benefit is it stops oil from collecting in your intake manifold and causing knock retard.

[Patriot Infinity]

I always thought those were common in just Corvettes.

[Fudge]

So are these thing needed, or recommended?
I've thought about getting one myself, but have mixed feelings about it!!

[AdWo2187]

I think heavily recommended for Hemi's. I emailed diablosport for a custom tune and they wouldn't even do it if I wouldn't have had a catch can.


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[MR72896]

Originally Posted by hothouse

The best benefit is it stops oil from collecting in your intake manifold and causing knock retard.

X2. But if you get one, PLEASE remember to check it frequently. I check mine every 2-4 weeks.

[RECONMARINE]

While I was getting an appraisal at the Dodge dealership the manager took my car for a test dive and after that opened the hood. He asked what is that, (pointing to the catch can), so I told him what it does. Then to my surprise he said “why don’t all the cars come with them? “ After my acknowledgement he then said “Oh, that would make the car last longer.” So, yes it Is an added benefit to have one. Less gunk in the manifold.