Moroso Air/Oil Separator Install (aka Catch Can)
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- Опубликовано: 28 авг 2024
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In this video we show you how to install a Moroso Air/Oil Separator also known as a Catch Can. There is technically a difference between an Air/Oil Separator and a Catch Can. An Air/Oil Separator will route the oil back to the oil pan while a Catch Can collects the oil in the can to be drained out manually. You could obviously pour the captured oil back into the engine if you wanted to.
For this install, we didn't bother trying to figure out how to route the oil back into the oil pan. It's much easier to just drain out the oil captured at a regular interval, like every engine oil change. We're not talking a significant amount of oil captured.
The primary reason for using air oil separators is to avoid recirculating oil into the cylinders. This can coat the air intake with oil and slowly clog the airflow. This translates to increased maintenance and decreased engine performance over time.
Another major benefit of using a separator in the PCV system is that it prevents excess combustible oil from getting to the cylinder. Too much oil can cause premature combustion in improper parts of the engine. These detonations can cause significant damage, especially if they are allowed to continue. Having a well-optimized PCV system in your vehicle will save you a lot of time & money later on.
*PARTS*
*Moroso 85474 Universal Air/Oil Separator Catch Can
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*HELPFUL TOOLS*
If you're looking for other tools not used in this video, check out Timmy's Master Tool List.
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*1/4" and 3/8" Flex Head Ratchet Set
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*3/8" Drive 6 Point Metric Standard Socket Set
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*3/8” Drive Regular Extension Set
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*Milwaukee Cordless Drill
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*Milwaukee M12 Battery
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*Milwaukee M12 High Capacity Battery
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*Milwaukee M12 Battery Charger
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*Bacho 10" Adjustable Wrench
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*Drill Bit Set
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*Yost Bench Vice
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*Yost 6” Aluminum Vice Jaw Caps
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**As Amazon Associates, we earn from qualifying purchases. 
Авто/Мото
You’re the Best RUclips mechanic teacher by far good explanation in all .i learn so much from your videos
That’s a solid compliment that we truly are happy to hear. Taking the time to comment is greatly appreciated and we hope you stop by the comments section again soon for compliments or questions!
Hi
There are two hoses, one with PCV valve and one without PCV valve in other side (passenger side)
That mean the oil pass into throttle
As always, great video and presented in a way that’s easy to follow / understand.
Thanks Ben. We're glad you like it and you took the time to comment.
I have been using my for 6 years already, different brand different setup but still do the same job.
I would check this brand looks like a nice upgrade of my old catch can.
Thanks for the comment. The Moroso is a nice unit. If yours is working fine, maybe just keep it and save money unless you're looking for a little extra flair for your engine compartment.
I installed an Oil Catch Can on my 237000 original mile 4runner and get about 1qt of oil/fluid mix every 320 miles/tank refill of gas. Seems like I have an excessive amount of blow-by. However, the engine runs awesome! Can cruise down the highway and excellent speeds.
Yes, that does sound very excessive.
nice, I have one on my turbocharged ecodiesel and catches same looking crud, now plan to add one to my SC T4R, thanks for the video, appreciate what you do
We were surprised how much the catch can accumulated after just a couple thousand miles! A must have if you’re SC’d. just imagining how much of this made it back into the engine after 2 years of being supercharged…
Added to my list for when I get a supercharger 😈🤘🏼
Yeah, you don't want to be left out on the cool mods.
Great info and presentation!
Thanks Doug, we're glad you like it.
Looks good dude! Now I need a supercharged on my 80
Yes you do! We might shoot a video for a 80 series supercharger install.
Great video. Very detailed as usual, great production.
Thanks Eliot.
Great video as always!
Thanks! We're glad you like it.
That production value tho 👌
You made Sean happy with your comment.
First one I have seen in a 4R interesting thoughts
What I wonder Chase is how people route the oil back to the engine. The air/oil separator is suppose to return the oil to the engine but where are they tapping in to do that? That's what has me puzzled. Are they drilling into their oil pan, tapping it and installing a fitting?
Just to add to my failure.. I collected the separated fluid from the catch can.. I let the fluid settle and it was more than 75% water vs all oil. Alot of condensation from bloq by gas in the crank case gets trapped in the catch can and not only oil.
Wow, that's not good that water is being collected. Time to do a compression check. Maybe you have a bad head gasket.
Love the Video. Out of curiosity, in the long term have you had any pressure problems after the install? especially with the super charger?
Not sure I have had pressure problems but maybe I’m not monitoring it like I should. How does one monitor pressure problems and understand if they are happening?
- Sean
what more meant is, for example I know that some 80 series Toyota land Cruisers will start to push oil out of the rear main seal and other places do to the pressure from a Catch can. have you experience anything like that? @@TimmyTheToolman
No, we haven’t experienced anything like that. This catch can/oil separator shouldn’t add any excessive pressure unless it’s clogged. I suppose that could be likely over time and it might be a good idea to clean the filter to prevent something like this from happening.
- Sean
What about the second valve cover. Its got a pcv as well
The driver side valve cover doesn't have a PCV valve, but it does have a fitting.
I have a quetion, can these catch cans starve motors of oil and cause damage to moving components in the motor that require oil? Where as an air/oil separator somehow returns the oil, that got filtered out of the air, back to the crankcase.
I would say no. For one thing, the catch can or air/oil separator can't hold a significant amount of oil. Even if the thing was filled with oil, it wouldn't hurt the engine. If you change your oil frequently enough and you actually check your oil regularly if your engine burns oil, you'll never run low on oil.
@@TimmyTheToolman Ok right on. Thanks for the quick reply. I have a 3rd gen Toyota 4Runner as well and I just ordered that catch can. Was seeing lots of oil collecting in the plenum. Thanks for the help man!
@@Codvrv No problem. Good luck with the install.
@@Codvrv do you know WHY it is collecting? i have a '97 rig that might have just started doing this at 341k and the MPG just dropped about 3MPG... lots of oil gas carbon mix pooling in the intake tube
Highly recommend AGAINST installing this on the 5vzfe... this adds significant pressure loss on the lines to the PVC valve which leads to over pressuring the lower crank case and also above the valve covers... ask me how I know... I'm currently dealing with a blown out lower oil pan fipg and valve cover leak due to a catch can I installed. What a pain in the butt. I'm using Tim's videos for the front differential removal to redo the oil pan seal.
What brand catch can did you buy?
- Sean
thank you!
Awesome. I’m doing this.
Cool. Good luck with the job.
Did you guys have any issues with air noise in the hose returns as I have seen with other systems?
Sean hasn't mentioned anything but he does have a supercharged engine which is louder than stock.
Who is here to party?
I don't understand what your comment has to do with the video, but ok.
These vids get me fired up
I actually had to remove the intake silencer because it was filling with oil from the two PCV lines 😬 I replaced the lines with small kn filters but this seems like a much better option. Does Sean know about how long it takes to get that catch can pretty full?
It hasn’t gotten full yet because I check it every oil change. But based on what you see being poured out at the end of this video, I would estimate it could take probably 10k miles to fill it up almost to the top.
There are (2) PCV lines? Where is the 2nd one?
@@spannersautoandcomputerser1649 the second one is on the drivers side valve cover, in the back near the firewall. It connects to the metal tubing on the top of the intake plenum then routs into the intake. It’s buried down in there a bit but the connections it the same 90 degree fitting like the one on the passenger valve cover.
@@TimmyTheToolman fair enough, thanks for your thoughts Tim! Sounds like draining the can every oil change should be just fine then.
@@corbinail3295 Yeah, that should be sufficient.
Nice job guy's. I don't remember exactly what i did on my 3gen 4runner but there is an other tube comes from second valve cover i put T connector and connect to the same oil catch can.
We know what you're talking about. That tube that comes from the driver side valve cover routes.back to the upper plenum. That's something to think about. Thanks for sharing.
Yes Sir👍
That seems like an awesome product, thank you for the dope video as always! I’m not sure if it would be worth the $180 to put on my 170k mile 3rzfe although the plenum was pretty black when I cleaned my throttle body very recently.
Yeah, debatable if it's worth it or not. Both my 4runners aren't supercharged so I don't know if I'll even go with one or not. I might give one a try at some point though out of curiosity how much oil it captures and keeps from going through my intake.
@@TimmyTheToolman Did you end up adding it to one of your 4Runners? Curious if you found it captured oil if so
@@awl1253 No, I haven't added it to either of my 4runners.
Thanks for another great video, guys!
I have been contemplating this sick mod for my 5VZ as well. Anyone know if this will pass CA smog visual? That is my only concern. Otherwise I probably would have done it already.
It shouldn't be an issue passing smog. The PCV system is still intact. It's just now routing to the catch container and then back to the plenum. A smog tech during a visual inspection shouldn't have an issue with it. If they did, it would be simple to just hook up the original hose from the PCV valve to the plenum, pass smog, and then reinstall the catch can lines.
Right on! Thanks @@TimmyTheToolman ! For some reason all the smog guys up here in The City seem to be sticklers for every silly little thing that is not a factory part in the engine bay. It’s really obnoxious. I’ve been to three places before just to get someone to accept the perfectly legal carb sticker for my Airaid intake tube. Then, the third place insisted that I had to apply the sticker directly to the intake tube itself in order to pass it. Now the sticker is all junked up and peeling off the plastic tube and I’ll probably just have to swap out the entire intake tube for the stock one for next smog. Just lookin to minimize the number of sickmods that need to be temporarily removed every two years 🤣
Btw, I noticed Sean’s carb sticker(s) on the firewall. That’s a much cleaner look and seems way more logical as well. Maybe I should just do that and tell them, “too bad I’m not moving it” the next time I have to smog. Ha!
@@benbanose Hey Dan, sounds like you need to travel further for a better and less anal smog station. The biggest joke is the stupid visual inspection. You could have a cracked vacuum hose and they could fail you. It use to be if the emissions coming out of the pipe was acceptable, it passed. Now for most vehicles they don't even check to see what's coming out of the exhaust pipe. They hook up the computer and if there's no CEL codes and all the emissions monitors are complete and ready, it passes provided they don't see anything on the visual inspection. Part of the smog system could be faulty causing a CEL, but even though it's not having a big effect on what's coming out of the tail pipe, you will fail. And, a lot of these emissions parts are expensive to purchase and expensive to replace. States like California are ridiculous with their smog laws.
@@TimmyTheToolman you said it man! It’s totally dumb. The Nanny State will always find a way to ruin everything. Haha!
@@benbanose Yep, I never thought I'd leave California but I'm going to be gone soon. I'm over it.
Thanks again for a great video. Does the height of mounting point matter in comparison to the pcv valve. Should it be lower to allow the oil to drain down? I wanted to mount it next to the 3.4L air box but it looks to be higher up than the pcv valve.
Hey David, the height shouldn't matter with the installation unless you are planning on having the oil from the catch container drain back into the engine. Then you'd need the catch container higher than the point on the engine it's draining into. You're moving air with very slight traces of oil in it. You're thinking along the lines of moving fluid which you're really not. The fine mesh filter in the catch container is just collecting those traces of oil in the air, which over time will accumulate to an appreciable amount of oil going through the intake of your engine.
@@TimmyTheToolman Makes perfect sense now. Thanks for the reply!
@@davidmalmberg580 No problem David. Happy Wrenching!
1st time viewer of this episode... looking for clues! my rig recently dropped 50~60 miles per full tank of tacoJuice after it had a bunch of replacing of and repairs of aged parts.. that is equivalent to 3 MPG on normal use like it has always been used and i cannot figure out WHY the MPG just dropped off a cliff like this. i put in a brand new Toyota PCV and hose (first new PCV valve in 345k miles) 5VZFE engine and MT
BUT! i am noticing a mixture of oil-gas-carbon coming back into the big intake tuba via the hose that goes to the driver side VC by the firewall on 5VZFE... why is this oil gas carbon mix spitting back in the tube on the opposite side of the throttle body?? i have no clues, do you have any clues what would cause this issue Timmy
Thanks!
J A Y 8^}
Some oil blow-by into the intake is normal. You replaced the PCV valve and it sounds like it's doing it's job providing crankcase ventilation. Why you've seen a drop in MPG, I don't know. Have you replaced your O2 sensors?
@@TimmyTheToolman truck has had NO CEL for any 02 sensors indication they are 27 yrs old + 348k miles so i need to get some definitely for the next leg of the taco journey... there was oily residue pooling in the big intake tube snorkel thing between the MAF and throttle body coming from the driver side hose going to back of firewall VC. i do not understand if that is for fresh air to go IN why is oily gassy stuff coming OUT of that hose?? I pulled the tube for that resonator box and stuck a finger inside and pulled out a pool + i think it was starting to cake on the throttle body ... the truck was out of my sights for 12 weeks and I have no idea what abnormal irregular harshness it was subjected to 8^{
@@TimmyTheToolman when is your next planned excursion to Colorado?
@@efil4kizum I have no plans to be in Colorado any time soon. What city do you live in?
@@TimmyTheToolman same as that Duane guy! TacomaHA
Whats torque spec did you tighten the fittings to? You didn't say in the video.. My V8 Toyota, I believe runs better
No torque value for the fittings. It's like tightening pipe fittings when doing plumbing work. You just use your best judgment and make sure you use teflon tape or some type of thread sealant so there's no leaks.
@Timmy The Toolman did you forget your German, its goodentight
@@DD-Aerial-Photography Oh yeah, what was I thinking? Gudentite is the spec.
Hey man I was hoping that u could help me figure out a misfire I have on 86 22re it only misfires on start up for 10-15 sec then clears up does it when it’s warm and could outside?
Are you losing coolant?
Yes it started by leaking out the bottom rad hose and I don’t even know why new hose , new clamp it would leak just enough to drip but I fixed that but now there’s no leaks anywhere and I go through a jug of coolant every 2-3 days now it doesn’t smell like burning coolant In the exhaust?
@@myarvlogs1017 If it's using coolant like that, your engine is consuming it. You either have a bad head gasket or cracked head. Over night, coolant is draining into the cylinder causing that misfire but then clears up after the coolant is expelled from the cylinder. That's my best guess.
If I did a leak down test on all of the cylinders would that confirm it
@@myarvlogs1017 Yes, it would.
👍
Thanks for the thumbs up William.
AOS and a catch can are two different things
Those terms are used synonymously. Even the Moroso product we installed in the video uses both terms in their product description. I tell you what, if you can get Moroso to change their product description, we'll change our video title. Then us know when you've been successful influencing Moroso to "correctly" label their product. www.moroso.com/air-oil-separator-kit-universal-kit-large-body85474/
air oil separator is not a catch can
Uhhhh, those terms are pretty much synonymous. Do a Google search and find out for yourself.
@@TimmyTheToolman ruclips.net/video/mp81Hzan5Fk/видео.html
Second!
Congratulations. You're the first loser.