Catch cans on late model GM

[BassLakeCruiser]

Anybody messed around with putting a catch can on their 5.3 or 6.2? Snake oil? Worth it? Voids warranty?

 

[LargeOrangeFont]

As long as it is not a vented catch can, yea it will work and it won’t void the warranty.

A vented can will introduce unmetered air and remove all vacuum from the crankcase.

Unless you are really beating on it, above 5000 RPM, it won’t collect too much.

 

[DarkHorseRacing]

What’s a catch fan?

If catch can, catching what?

 

[BassLakeCruiser]

19-24 GM Chevrolet GMC Truck 5.3L 6.2L Oil Catch Can Separator Plug N Play ™

UPR compact Plug N Play catch can kit for 2019-up Gm trucks with 5.3 and 6.2 liter engines.

www.uprproducts.com

 

[DarkHorseRacing]

Ok so I take it that it’s for gas only engines?

What would be the purpose? Keeps oil from going into the intake? Like from the breather hoses?

I have a 2016 and I see the breather hoses from the valve covers tee into the intake tube. So this just intercepts the oil? Seems dumb that GM would want the engine ingesting it’s own oil.

 

[Kachina26]

Ok so I take it that it’s for gas only engines?

What would be the purpose? Jeeps oil from going into the intake? Like from the breather hoses?

I have a 2016 and I see the breather hoses from the valve covers tee into the intake tube. So this just intercepts the oil? Seems dumb that GM would want the engine ingesting it’s own oil.

No Jeep, Chevy.

 

[rivermobster]

They are pretty much a necessity as far as I can tell.

I just had to temp pull the one off a friend's truck, so she could get it smogged, and it had quite a bit of oil in it.

It's a Chebby thing.

 

[LargeOrangeFont]

They are pretty much a necessity as far as I can tell.

I just had to temp pull the one off a friend's truck, so she could get it smogged, and it had quite a bit of oil in it.

It's a Chebby thing.

I’d say it is a all modern vehicle PCV thing at this point. I got one on my truck and it collects oil between changes.

 

[Riverbottom]

Put a J & L on my wife's Tahoe. It comes with its own hoses with factory connectors, so you could change it back at any time. It looks so factory no one has noticed it. I will never have a new car without one. I change the oil every 4500 miles and get about five ounces in the catch can.

 

[zbudman]

Funny GM doesn't think there necessary.

 

[Justfishing]

Are we talking di or port injection. I can see them on di. If you are saying port then school me.

My knowledge is they help keep intake valves clean on Di

 

[Cole Trickle]

I'm a fan...Seems the newer direct injection motors ingest a ton of oil through the pcv systems.

My mustang would have a couple ounces in the can between oil changes.

 

[LargeOrangeFont]

Are we talking di or port injection. I can see them on di. If you are saying port then school me.

My knowledge is they help keep intake valves clean on Di

Port injection sees a benefit too. The LS motors for instance need them because the oil draining back to the sump hits the spinning crank and is turned to an oil mist. This mist will go through the PCV system and end up in the intake tract. Now you are burning oil through the combustion process.

GM tried to address this with a smaller PCV orifice, which works OK until you get to higher RPM and the PCV system can’t keep up and you simply push oil into the intake.

The catch can takes most if the oil mist out of the airflow back to the intake from the “clean” side.

 

[Dana757]

Someone must think they are worth doing. Here’s 4,400 fittings going to a catch can company.

 

[Radioactive]

I think its a necessity. I am amazed how much it collects. It is usually full at oil change. 2018 GMC 5.3

I think I have the E2

Oil Catch Cans | Online Auto Parts Store | Aftermarket Auto Parts Distributors - Elite Engineering

Looking for oil catch cans and other aftermarket car parts online for your vehicle? Shop Elite Engineering for the best parts available today!

www.eliteengineeringusa.com

 

[LargeOrangeFont]

I will add that for any car that sees heavy track use, even a catch can isn’t really enough for an LS. You need to delete the PCV system entirely or run a vacuum pump.

I had to convert to an open breather setup to get the car to stop filling the catch can. A -10 from each valve cover and a -6 from the valley cover to an open can finally gave the crankcase enough breathing ability to stop pushing out oil 6oz of oil + in a 30 min session.

 

[spectras only]

I have a small catch can on my Miata track car. Have max 10 psi boost set by the WG and only have maybe 1/4" oil accumulating in the bottom of the can, after an all day session running WOT . There are two connection on the valve cover, I use a breather on one side, two hoses on the intake. One after the throttle plate and one through a PCV. My rev limiter is set at 7200 rpm. Fellow member has a Exocet with same 1.8 NB Miata, he has his boost set to 15psi and runs close to 8000 rpms He has two catch cans and always emptying them.
Catch can is in the upper right side firewall

Breather on the port side. The turbo can put out 20psi if I'm crazy to change the WG spring Nah, want the engine live longer.

I'm changing the valve stem seals today.

 

[LargeOrangeFont]

I have a small catch can on my Miata track car. Have max 10 psi boost set by the WG and only have maybe 1/4" oil accumulating in the bottom of the can, after an all day session running WOT . There are two connection on the valve cover, I use a breather on one side, two hoses on the intake. One after the throttle plate and one through a PCV. My rev limiter is set at 7200 rpm. Fellow member has a Exocet with same 1.8 NB Miata, he has his boost set to 15psi and runs close to 8000 rpms He has two catch cans and always emptying them.
Catch can is in the upper right side firewall
View attachment 1174183
Breather on the port side. The turbo can put out 20psi if I'm crazy to change the WG spring Nah, want the engine live longer.
View attachment 1174184

I'm changing the valve stem seals today.

Just delete the whole PCV system and go to an open breather setup?

I went from pumping out almost a quart of oil a day out of the catch can to a shot glass worth.

 

[spectras only]

Just delete the whole PCV system and go to an open breather setup?

I went from pumping out almost a quart of oil a day out of the catch can to a shot glass worth.

Tried it without the PCV before, no difference in the amount of vapor going into the catch can. I'm guessing, if you have too much oil in the catch can in a very short time, there's a blow by. Bigger problem, you'd need new rings and a hone.
The old seals are hard now from extreme heat we had last year [ near 50C ] and the holes got large by a lot, hence my blue smoke on startup. Pretty much every car started overheating after the 8 lap sessions.

Ps; my son just came back from Vegas International karting event. He said it was crazy with hundreds of competitors, He did 12hrs work every day, changing engines and servicing karts with Catalyst Driver, after each race.

 

[BassLakeCruiser]

Quick update. Went with the UPR can. Install was elementary and zero noise or check engine lights. Their instructions were pretty vague and had to Google and YouTube some stuff for clarity. See how it looks at oil change but will prolly peak a few times before then

 

[LazyLavey]

Installled on my Canyon 2.8l diesel..

drain it every oil change and get about an oz.

Apparently with a turbo it's beneficial due to prevents oil residue build up in the inner cooler.

But I imagine it could be beneficial in most cases?

 

[pronstar]

Have had one on my Silverado for a while, have the parts just need time to install on our Suburban.

This is what I got...no real benefit to paying a ton of money for a Gucci catch can.