Oil Catch Cans: 101 - EVERYTHING you NEED to Know!
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- Опубліковано 4 лют 2025
- Welcome to In The Shop TV! In this episode of our Build Series, we dive deep into the world of oil catch cans. Learn how they work, what type of catch can you should buy, and how to install your catch can to maximize its full potential. We’ll also highlight two of the most popular choices: the “Motion Raceworks Top Loader” and the highly popular, budget-friendly Amazon oil catch can.
What you'll learn:
Types of Oil Catch Cans: Understand the differences between vented and non-vented oil catch cans and which type is right for your engine.
Hose Routing Options: Discover the best practices for hose routing to ensure maximum efficiency and cleanliness under your hood.
Do You Need an Oil Catch Can? We'll discuss the benefits, drawbacks, and necessity of installing an oil catch can in your vehicle to keep your engine running clean and efficiently.
Why watch?
Oil catch cans play a critical role in maintaining engine performance and longevity by preventing oil and other contaminants from entering the intake manifold. Whether you're a seasoned mechanic or a car enthusiast, this video will provide you with essential knowledge to make an informed decision about oil catch cans.
Don't forget to subscribe to In The Shop TV for more automotive tips, build series episodes, and detailed tutorials. Hit the bell icon to stay updated with our latest content!
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Catch cans shown in this video-
Motion Raceworks Top Loader: motionraceworks.com/products/motion-raceworks-billet-dual-port-catch-can-dual-10-an
Amazon catch can:
amzn.to/3ypIBL0
Best thing for those push to connect fittings - boil a pan of hot water, dunk the hose end in the water for a minute or so, then slam them on the fittings. Works well and leaves no residue that can cause the hose to blow off later.
I used to do that. I find that the BEST way is to use new hose. But a slight film of silicone grease never hurt
Thanx so much!!! This video was definitely exactly what I was 👀 for. The difference/installation of vented/sealed. Great video
Really glad to hear that! Thanks for watching! I have another video on converting it to a sealed can, but I prefer the vented orientation. Thanks for watching
I like to go back and watch your videos again. Nice work.
@@kennethgray3794 there’s a follow up to this video coming out this weekend!
Great info on catch cans ! Awesome attention to detail in the engine bay 👍🏻
@@apeters911 thanks for watching and for the comment!
Glad I stumbled upon this channel my friend. I'm building a 6.0 in a 49 Chevy. Of course the same intake as yourself. I could not get injectors in the intake. Long story short I had to ream the holes out in order to get my Holly injectors to fit the intake. As for the catch can I'm glad I saw that video as well. I will be running boost and it's good to know I need to go with the double inlets on the catch can. It's my first time ever building LS motors so a lot of this stuff is new to me. Great great explanations on your videos. Thank you.
Hey! Thank you!
So I just went through making the injectors fit properly. There are several different o-rings. You need to find the ones that fit your intake/rails. Here’s the intake video about it: Fabricated Sheet Metal Intake Manifolds - Should YOU Get One?
ua-cam.com/video/ko7hYBJtKQw/v-deo.html
Hi thanks for your advice, i am considering mounting one of those on my pick up, but I have noticed that on my crank case I have 2 pipes that release pressure/fumes. 1 goes from crankcase inside the air admissions manifold(between filter and throttle body)...the second pipe goes from the crankcase inside the inlet (between throttle body, map sensor)
my doubts is, where should I place the oil catch canister?or should I place 2? both gets dirty with oil😅
@@powergym1984 I dont know what kind if engine you have, but for a vented catch can application, you’d run a line off each (assuming v8) valve cover to the catch can. Then you’d cap off the inlets to the throttle body and intake manifold.
Great video, just what I was looking for! SUBSCRIBED!!!!
@@ashleykolbuss6932 thanks man. I did another catch can video not long ago too.
My reason for the vented can is simple. It's Clean cold air fuel ratio. Keeping my cold air intake as clean as possible and polished for air movement also offers the best and cleanest combustion for the best HP and MPG and the most pollution-free exhaust per MPG
I’m with you - the cleaner the air, (and intake) the better👍
Great post
Thank you
I plan to run a dual sealed catch can setup from Racetronix. One will be inline from a valve cover to the air filter base, and the other will be inline from another valve cover to the throttle base PCV port. The twist on my setup will be this adjustable billet PCV valve from Wagner Performance on the outlet of the 2nd catch can, which will keep it cleaner than it being on the valve cover passing the contamination to the catch can. Im sure some people will think what they will about my first catch can being plumbed to the air cleaner base, but the factory engineers were clever! There is more negative pressure between the air cleaner and the throttle, where the engine bay will be at atmosphere, or even pressurized slightly. Under load, your crank case will fare better if the breather line was being scavenged over being vented.
Sounds inventive and elaborate. I like it
DW
I totally agree with you.
@@intheshoptvnegative pressure in the crankcase is the best scenario. That is why the sealed can is better.
The crankcase is always pressurized in order for the vented system to work. This is a less than ideal scenario.
@@sloeryd Hope its working out great for you. Thanks for watching
Wht woulld you need a dual setup, its all. Connected so as long as your taking air from the motor you should be fine
Great tips regarding oil catch cans vented.
@@unwrangler11 hey thanks. And thanks for watching
As soon as I saw Motion Raceworks I knew which one you were using! Another great video.
Thank you! Its a well made product. The LY6 is such an oily engine and with no other vacuum ports other than the intake, the two inlet design just made a lot of sense
Great video, I have a Motion raceworks vented can mounted on my firewall. As long as your firewall is seal it hasn't been a problem. Can confirm in the humid south in the summer with a 700 hp big block, there is bit of steam coming out at idle. At first I was alarmed, but now I'm use to it.
@@GorhamWorks I had the thought of ditching the filter and plumbing a line from the top to my exhaust
Glad I watched this. I was on the fence with the filtered setup, but now I know what I want to do.
@@SlowpokePNW Thats really cool to hear. Glad it helped you out! Good luck, and thanks for watching!
Thanks for posting this, was questioning the difference. Clean build btw!
@@Dribbles88 You’re welcome, thank you for watching!
Super clean setup! I was wondering about the catch can setup.. looks good! I may get me covers soon
Thank you. Good luck with your project!
My boxer engine has three vacuum lines: two for each valve cover that go to the intake before throttle body and the third is from the crankcase to the PVC valve intake manifold.
The crankcase to manifold has all of the oil residue, but the valve cover tubes are clean with 180k miles. So, I think I only need the catch can for the crankcase, correct?
If you want to keep the same recirculating configuration (not venting to atmosphere), then yes, thats exactly correct!
You're right and on boxer engines like Porsche you shouldn't ever need a catch cans between heads and intake because they have scavenger pumps in the heads forcing the oil out of the heads to the crank case if you ever get oil in those line then the pumps in the heads are bad
Okay, so I have a questions. I’ve watched many oil catch cans now. I’ve noticed that most of, if not nearly all the videos, run the oil catch cans from the valve cover/s. That’s fine but what about the main pcv that exists off of the block instead… I’ve seen very few run the can off of that. Ig my question is many; is running the oil catch cans off the valve cover enough? Or is it better to put the can to use off of the “block” pcv? Is it possible to run a duel setup that feeds both systems? The reason is ask is because if it’s just off of the valve covers, that usually just recirculates back-before the throttle body. The pcv off the block, runs back into the manifold itself. So if you doing it just off the valve covers; aren’t you missing that vapor being sent to the manifold? This is assuming both are still needed. Now I’m researching this for maintenance purposes on my daily, which is a K-series Honda. So Ik you said that’s an LS but I’m still assuming it still has a block pcv too. So I’m confused ig. Not to mention. If it’s from the block, can it be vented. Would that just be a “leak”? Or since “air” from the block goes back into the manifold, would replacing it be fresh air be the same?
I’m tempted to just buy two catch cans. One for valve cover, one for block. Run both vented, I’m curious as to if that’s too much and will make it a “air leak” to due unmetered fresh air-after the maf. Thus triggering a code. If so, go sealed for the block; keeping vented for the valve cover. I am curious because I have not seen that done. I’ve looked all over…can’t find anything like that. So idk if that will work, both vented. What does the internet think?
Like me you suffer from over thinker’s disease lol… pcv or “ positive crankcase ventilation” is pcv no matter where you take it from. Taking it from two different locations is pointless. Yes, if you take pcv from the valve covers and vent to atmosphere, you are missing it being recirculated back into the manifold… but thats kind of the whole point. You don’t HAVE to send it back through to be reburnt. In fact, if you run high horsepower or boost ect, you dont WANT to send it back to the manifold. On a street car, its really just a matter of preference.
My Toyota PCV is slung low on the block and slurps engine oil. I ran a sealed unit in the line last spring. No engine lights(I’m sure it would throw a vacuum code if it wasn’t sealed). It’s been catching a mix of oil and water. I’m sure it’s not catching everything, but otherwise the air intake is a disaster and that oil vapor mixes with the EGR gases at the top of the manifold and forms a sludge that eventually blocks the EGR ports. So I’ll take what I can get.
Make sure you run a high quality hose, mine was like $10/foot from Napa, otherwise it’ll likely collapse with the heat and vacuum it’s under. I’ve seen a lot of videos where the creator has that happen.
Want to know if you'd have an issue venting from the block? Run the car with your oil dipstick lifted. If no problem then you can do a vented catch can from the block. Volvos normally run a not so simple pcv setup which when gets clogged sometimes forces the dipstick from the housing. Had a Volvo 850 years ago which I ran with the stick lifted. Sometimes splashed a little oil in the engine bay. Have a Volvo xc90 presently that suddenly started leaking oil from multiple seals. The pcv test for Volvos is to remove the oil cap and place a rubber glove over the opening and if the engine tries to suck it in the pcv system is ok. If it inflates the system needs servicing. Mine wasn't inflating. Decided to pull the dipstick a little and drive. Got some splashes in the engine bay (crankcase pressure) and my oil leaks all but disappeared. Right now running a vented can (made from a thermos) I've removed the dipstick totally and clamped a hose over the housing which goes to the can.
Perfect. Thank you guys. Ended up running a filter for the valve cover. And an oil catch can for the block to manifold. Works great. Gave it a good intake cleaning and it seems to work like a charm. A few thousand miles later and it’s just as clean as I left it.
add the pot scrubber stainless wool from dollar type stores allows oil a place to wick onto works great
The Amazon can actually came with a little ball of that stuff lol
I did that same thing but the wool ended up rusting and falling apart. I even found some flakes in the oil filter on the next oil change
@@necro5230 if you watch the demonstration by motion raceworks of them testing that can, It does a perfectly fine job of removing all the oil from the air anyway, without any internal media
Do you which Speed engineering stainless headers that he used in this build? Speed Engineering part #would be great
@@jeffvollbracht1341 the headers I used are in another video. Click on my videos and its about half way down. Part number link is amzn.to/3WM7TfI
If fumes become a bother it would be good to fabricate a housing for the filter with a hose outlet routed under the car. A vent for your vent.
Yep. In my case, all I can smell is exhaust with no cats lol
What kind of rubber do you use on your hose? :)
Seriously though, I'm seeing these cans on the market with a mesh filter for a top hat but also three lines instead of two, even for small engines. What's up with that?
Just different plumbing options.
Loved the video,very nice build
Thanks a lot!
Mike that would be called “blow by” thanks for the rundown.
Yes. I just dont like using the term in videos because people too frequently consider the phrase a “bad” or negative thing, when of course all engines have some degree of blow-by. I just dont want to make anyone that might not know that, nervous.
The only thing I have thought of is maybe there should be some sort of relief between the PCV and the vacuum line in case it freezes up in cold weather because 1/2 the stuff in the can will be water and over pressuring the crankcase would be bad news, especially with plastic valve covers, just a thought
@@johnbolt665 that wouldn’t be an issue with a vented can configuration
I have the first catch can on my lbz duramax i put the filter on the output port works good
@@TheOneNOnly88 Its a pretty popular can, so many people have them.
Does it matter to have that catch can mounted that close to your air intake? Won't your air intake suck up that Steam and Vapors?
also, I'm guessing I would need the vented type? because I'm running about 850whp currently.
I love getting great questions like this! No, in my case, that intake tube’s filter will poke through the inner fender and not be in the engine bay anyway. Although, even if it was, the can’s “smoke” wouldn’t matter, as all the oil has already been separated. In a sealed/non vented application, its supposed to return to the intake anyway (granted not through the throttle body) but its not a big concern. In your case, especially if you’re running boost or a power adder, yes, you’d benefit from a vented system. Thanks for watching and for the great comment!
That looks good brother. The Ly6 intake I got with alot of the parts I am using for my Ls3 swap had a bit of oil in it as well. I will definitely be running a catch can. Thank you sir.
Great intake but yeah, that PCV system isnt for me
@@intheshoptv Yea garbage!!!
@@GrandPitoVic agreed
I placed a catch xan on my first Ram 1500 5.7 hemi at 1200 miles. My new 1500 I placed a catch can at 150 miles and at 16,545 miles and it being a 2021 hemi etorque it is definitely keeping my NA engine intact spotless. It's a sealed that unit I purchased from ebay years ago for $59 shipping and handling. It mounts to the head of the block
My daily is a 20’ Laramie 5.7. Love it!
Great video I understand even more now before fitting one. A little KnN filter on that would look nice in your engine bay.
@@oilburner8548 glad it was helpful. Thank you for watching!
Where did you get those valve covers?
@@glengareau5516 ua-cam.com/video/ttM56QBpCL8/v-deo.htmlsi=KBd_5ved1rtf1EPq
AWESOME CONTENT.
I’m currently in the exact same position of my build as you are. Thanks for the advice
You’re welcome! Good luck hope it turns out awesome
Does a catch can hold vacuum? Like could I run my brake booster AND my pcv valve off of a catch can rather than just the pcv? Would a sealed can be better for my application?Trying to do a vacuum pump delete on my silverado. And not trying to crimp off my pcv valve
Think of it this way,
1- a sealed catch can is nothing more than a container in line with your PCV plumbing. It can NOT be ventilated if it’s in-between your PCV plumbing because it would introduce a vacuum leak.
2- a vented catch can acts as your crankcase vent, without any lines returning to the intake. Think: breathers on valve covers during the carburetor days. Same thing, only with a can to catch any vapors containing oil/particulates
Hope that paints a more clear picture
So i can run each hose to each inket and not have to worry about putting anything to a vacuum port?
@@SticksAndStonesLapidary I dont have any vacuum ports on my gen4 throttle body. If you do with a gen 3, you just have to cap them. Thats it!
If I wanted to block off the port on the manifold and my intake on the car and run the catch can inline between the 2 valve covers on my car does it need to be vented or can I do that with a seal can as well? For reference v6 NA motor making maybe 320whp
Vented! otherwise you’re rapidly pressurizing the can.
If you have emissions inspections on you vehicle, make sure your vented catch can is legal to use. In some areas it will be off-road only. That's why I use a sealed can.
@@jessebunker6062 I mentioned that in the video
Question: Any problems with the engine computer if the catch can vent is not routed back to the intake?
No
The metered air vs unmetered air is going to be a issue if its not set up right.
I mean, everything in life is going to be an issue if its not set up correctly, right? Lol
Hello I'm wondering is it possible to relocate the filter from using a pipe from the catch can an mounting the filter in a different location than onto of the catch can?
@@billspooner3792 absolutely! I made a follow up video talking about exactly that:
ua-cam.com/video/EsoI98RGX0M/v-deo.html
@intheshoptv cheers mate just watched it, I have subscribed to your channel from this video... I be a regular viewer
@ Thank you sir. Much appreciated!
So if you use a vented catch can what do you then do with the PVC hose?
@@Ringmaster30 that depends on what gen engine you have… if you have a gen 3, you’d cap all the other lines and just run two off the valve covers. If you have a Gen 4, they already did away with those lines and you’d still just run one from each valve cover. My next video this weekend will be of interest to you
So let me explain so I understand it myself. So non-vented would be coming from the vc to the IN port and the OUT port goes to the intake manifold. Now vented you just reverse your hoses at the catch can? Is this right?
Depends on the can you’re using. With a can like the motion raceworks that’s designed to be vented to atmosphere,
You simply run a line off each VC to the dual inputs of the can. In a sealed can, you would run the output of the can to the intake, correct.
@@intheshoptv Hmm? Both VC? My system from the factory is not set up with a PVC on both VC. I have a 2013 Chevrolet Silverado 1500 LTZ. My system have the PVC only on the left VC which connects to the top of the intake manifold. I know this cause I had to upgrade the valve cover to the updated design my GM. The oil catch can is like the first one in your video the Evil Energy. I think my options are very limited here with my particular setup from the factory. Thanks again!
Dumb question. I need to install a catch can in my daughter's CTS. I had ordered the one you have from amazon.
Does the in side go to the pcv valve output and outside got the intake manifold? I've tried to search for a straight answer to this and can't find a video or anything showing the exact way it hooks up.
@@tac_r_usoutdoors8984 You would leave the pcv on the clean side, untouched. Then take crankcase ventilation from the tube on the valley cover and route it to your catch can, then out of the catch can to the throttle body, or intake. Hope that helps!
more info on hose setup i can find much on it i got a catch can but i want to do either AN or basic hose to the can
@@r34drew which can are you purchasing?
Hi, I need some advice please. My car is rebuilded, new proper gapped piston ring, turbochared, no pcv, vented oil catch can. I have smoke from the filter on the top of it. Is it dangerous? Is it flammable? How to fix this it's scary. Thanks.
@@alundrasrt Do you mean what looks like smoke coming out of the catch can filter?
Some food for thought, venting to air keeps the crankcase at atmosphere. Venting back to the intake would keep the crankcase in a slight vacuum(in my mind is better). Like you i dont like the idea of oily air going back into the intake, so why not connect to your ehaust?
I was actually discussing doing that with someone on the LS forums a few weeks ago.
100% ... with that set up, long thin lines with no vacuum, id guess a higher crank case pressure than the original set up. Another way is use a 12v secondary air pump (smog pump) pulling from the catch can
Great content mike.
Thank you! Much appreciated
Do they make them for F150 with 5.0 and also with the push on connectors
They are universal!
yes they do I have one on my 2015 mustang GT 5.0 it comes with the molded plastic line and ford lock clips, and doesn't need to be mounted.ua-cam.com/video/Lqn0Yum_Ujo/v-deo.html
What was the cause of the excessive oil in the intake manifold
The factory Pcv configuration plumbs the valve cover back into the intake. The vapor contains micro particles of oil that build up over time, the intake itself ends up acting like its own catch can
@@intheshoptv why not install a catch can between the valve cover and the intake tube to slow down the oil mist when under load and help keep the intake dry and less in take valve carboning ?? old 72 year old mechanic talking in my sleep .😂🤣😅
@ They do. Thats the other configuration I mentioned to where you’d run a “sealed” catch can.
I was recently using a vcm catch can and it has 4 outlets and it was constantly evaporated my oil i noticed i was using a litre of engine oil a week so ive gone back to a sealed can with 2 outlets and it's not using much oil and the throttle response is way better ive noticed
Im from Australia think our catch cans are slightly different
Thanks! I have one on my Jeep that I made out of stuff laying around, stuffed a stainless scrubby in it. No I may look back at that setup.
Love DIY ingenuity!
Got the info in a far amount of time with a joke in there. Very helpful
Thanks for watching, much appreciated
Heck yes, lets do it
Right on!
Oil vapers have been going back into our engines for many years, we didn't see it in manifolds because it went in before the carb, in the air filter, and then was "washed" away by the air/fuel mixture. Now because intakes have no fuel in them we can see the oil collect. I will be running a sealed catch can, mainly for the odor a vented can will cause.
As much as I would like a live show, the timing never works for me, I either forget or I'm busy.
I had a crazy idea of removing the breather, and plumbing a stainless braided line back and tapping the exhaust somewhere. Would still be a vented catch can, but the exhaust would help pull vacuum and I wouldn’t have visible vapor or odor. Hmmm 🤔
@@intheshoptvsome of the exhaust manifolds have EGR ports that potentially be used? I had a similar thought.
@@ScottTheEng I have headers so I’d have to drill and weld a bung on. They do make clamps that have the bung too… maybe thats an option if further downstream 🤷🏻♂️
Vented is the way to go I have 3 cars they all have one works well.
Yeah I made a video after this one showing how it can be converted to a recirculating/sealed can… it worked but I already switched it back to vented lol
I run 2 out to atmosphere on my camaro with several crankcase filters, I am running 950 rwhp.
Yep you need em with that kind of power. Do you get much steam/smoke noticeable at idle?
@@intheshoptv very little, but you can certainly smell oil after wot.
@@chriscook377 I can smell mine at idle. The LY6 is an oily sob
Are your valve covers baffled? Im considering the motion works can, but my valve covers are ported in the center and at the back..not towards the front and top.
Yes, they are the Holley designed covers with baffles. I think my second video I ever made on this channel goes over the valve covers: ua-cam.com/video/ttM56QBpCL8/v-deo.htmlsi=URLN10moRGT5jXhX
I'm down with the live videos, a man can never have to much knowledge..
Thanks! Yeah I picked up a few things from viewers myself.
ROFLMFAO!!!! DAD JOKES!!!! YUS SUH!!!! WE def are allowed the middle aged dad jokes. WE EARNED IT!!!!!
I mean making these videos, Im literally talking to myself for hours… might as well make myself laugh at stupid jokes!
@intheshoptv I know that lol. Some I have to cut it. Yea I prob shouldn't post that. Lol
@@GrandPitoVic for sure
Just a small detail.
Vented oil catch cans are illegal in California, whereas sealed oil catch cans are legal. This is especially important when a vehicle has to go in for a smog test every 2 years.
@@not12listen I actually mentioned that later in the video, if you continue watching. 👍
@@intheshoptv Admittedly, I got distracted by other items around the 7 minute mark.
"Check your local laws" is different than "vent to atmosphere is illegal in CA" - and I mean no disrespect to you at all.
@@not12listen Which is exactly why I said people should check their local laws, we can’t go and cite the individual laws for each state lol
My schedule is so varied that live videos don't work. For people with a more routine shedule they would work well.
@@bobpegram8042 Thanks! This video was shot quite some time ago. We tried one live video since then. It didn’t have a ton of views but getting to hang out and interact with the viewers that did show up, was a lot of fun
All direct injection engines need catch cans
She’s an oily one.
Lives, yea.man!!!!!
Could be fun!
No engine blow by. Think of it as sewage. Going back to mixing the filtered cold air with sticky sewage then polluting the air-fuel ratio giving a much poorer combustion losing HP and MPG. With each combustion revolution the cold air intake reduces in size slowly choking off the air to the engine. Sticking to the backs valves and highly machined and balanced turbo parts and injectors then turning into very hard-to-clean carbon again closing down and choking the air to combustion chambers. As well as reducing the quality of the best and cleanest combustion ie. pollution. That gets worse with each combustion.
That is just poor engineering and quality controle. The Vented catch can is the best with the least all around trade-offs.
Thanks for sharing your thoughts!
In California, if an engine has a PCV valve then oil catch cans are not legal. If your car is old enough to not have the valve then the oil catch cans are legal. I have a 1990 Toyota Camry 4 cylinder which has the gas recirculation hose, but no PCV valve so I can add the oil catch can.
@@bobpegram8042 I mentioned towards the end of the video that there are laws, rules and regs regarding their usage. 👍
Yeah, I wouldn’t want that oil sitting in my intake either.
Yeah, that’s out. Cant do it. Lol
Gotta keep em separated😂😂😂
@@americanhero1234 Hey, at least two of us laughed! 😂
Why not just vent the hoses under the car
Oil tends to escape via those hoses, hence the reason for the catch can in the first place. Or did you mean the return like from the can?
EPA reasons 😅
I just installed my ADDW1 catch can. I still have zero oil in my can. How long does it take for it to pass?
@@johndurante2322 its a cumulative thing that takes place over a long period of time under light to normal use, assuming minimal blow by. Race applications would dee accumulation more rapidly, as would a daily driver if it had above average blow-by/worn rings etc. Sounds like you’re in good shape! Mine also has no oil in it, although Im not on the road yet… I only start and run it a few times a week.
Great video !
Living in Canada, I now know which can I’ll get…