4Runner Oil Catch Can (SXTH Element)

[Vincenzo]

I am not an expert on the topic but, I suspect fuel choice and driving habits can influence carbon build up. I only use Tier 1 fuel.

On a previous vehicle, I'd put in a Chevron Fuel System additive once every few months. No clue it it was doing anything as I never needed to take the heads of or use a bore scope. The Engine was a 2.0 Ecoboost, twin turbo Ford. 160K, running like day one, same gag mileage and performance. Granted, that is a scientific analysis.

Kinda off topic, is anyone using a Fuel cleaner or additive on the 4R yet? I'll start a new thread if I don't see one already.

Like I previously mentioned earlier in the thread. I think some have missed it. I corresponded with J&L. All they do is catch cans. I asked why they don’t offer one for this motor. I don’t remember the specifics but they said something about the design of the crankcase and how it vents. They won’t be making one and don’t recommend putting one on.

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[Oldhoosier]

Because you dont have experience with turbo charged vehicles?

Actually, I have, small turbo engines like the ones in the four Runner. Large high-performance engines may benefit, the manufacturer of the kits certainly benefit. There are tens of millions of small turbo engines that have put on billions of miles without benefit of these kits and seem to have suffered no ill effects.

On the other hand, I did order some large flame decals that I will put down the side of my 4Runner. The company selling the decal guaranteed an extra 20 hp.

 

[HVLA]

Actually, I have, small turbo engines like the ones in the four Runner. Large high-performance engines may benefit, the manufacturer of the kits certainly benefit. There are tens of millions of small turbo engines that have put on billions of miles without benefit of these kits and seem to have suffered no ill effects.

On the other hand, I did order some large flame decals that I will put down the side of my 4Runner. The company selling the decal guaranteed an extra 20 hp.

No ill effects other than burning oil in the combustion chamber for no reason at all. Because burning oil is great for an engine. Or do you just not understand where the oil is going now?

 

[Papa Smurf]

Like I previously mentioned earlier in the thread. I think some have missed it. I corresponded with J&L. All they do is catch cans. I asked why they don’t offer one for this motor. I don’t remember the specifics but they said something about the design of the crankcase and how it vents. They won’t be making one and don’t recommend putting one on.

If J&L says not to run one then i wouldn't run one they are one of the OG's in the catch can game and know there shit! I ran one on my Explorer St i had and traded for the 4runner and still run one on my Raptor.

Catch cans have there place and are application specific and not a be all end all just cause your boosted. It all depends on how the PVC system is plumbed and operates. They also work on NA motors. I have one on my 2013 Ford Raptor with the 6.2L as the way the system works is it recalculates warm gasses that carry the unburnt fumes along with oil vapours that get carried along for the ride straight back into the air intake to get recycled. But once they hit the cooler air/air intake they condense and they coat the throttle body's in the 6.2L Nothing major but if you run it hard its just cheap insurance and save from having to clean the throttlebody's as offten.. Thats why direct injection have more issues with valve train fouling due to this and need to be cleaned periodically cause they don't have the port injection that helps reduce that build up. But like i said it all depends how the system works on the specific application.

NA and low boost turbos that are DI and Port injected not really needed in most cases. High boost and DI Injected benefit the most.

And yes i drive the shit out of my Raptor.

 

[Oldhoosier]

No ill effects other than burning oil in the combustion chamber for no reason at all. Because burning oil is great for an engine. Or do you just not understand where the oil is going now?

So maybe you can explain to the crowd how so many millions of engines have survived to this point without some kind of engine saving attachment sold by snake oil salesmen.

Besides, burning oil in a very minute amount has no effect on the vast majority of the engines in cars today.
If you want to waste your money on a gimmick, feel free. While you’re at it, you might go ahead and put one of those magnets on your fuel line that helps increase fuel mileage.

 

[HVLA]

So maybe you can explain to the crowd how so many millions of engines have survived to this point without some kind of engine saving attachment sold by snake oil salesmen.

Besides, burning oil in a very minute amount has no effect on the vast majority of the engines in cars today.
If you want to waste your money on a gimmick, feel free. While you’re at it, you might go ahead and put one of those magnets on your fuel line that helps increase fuel mileage.

No one said your engine wont survive. Burning oil 100% has an impact on every engine it occurs in. The fact you are comparing this to a magnet on a fuel line says all I need to hear.

 

[aerofly]

So maybe you can explain to the crowd how so many millions of engines have survived to this point without some kind of engine saving attachment sold by snake oil salesmen.

Besides, burning oil in a very minute amount has no effect on the vast majority of the engines in cars today.
If you want to waste your money on a gimmick, feel free. While you’re at it, you might go ahead and put one of those magnets on your fuel line that helps increase fuel mileage.

I use a magnet on my oil filter just to save the filter some work

 

[Van Solo]

Can't say I see a need for this product. Nor do I feel it missing being an oversight of the Toyota Engineers.

Period!

Update, I have done my research here and stand corrected.
It appears that most race applications do Indeed use these type of devices so it got me interested enough to spend a good amount of time researching a lot so here's the basic:

Oil catch cans (or oil separators) are installed on engines—particularly Direct Injection (GDI), turbocharged, and high-performance engines—to prevent oil vapor, fuel, and moisture from the crankcase from being recirculated into the intake manifold. By capturing this "blow-by," the device keeps the intake system clean, preventing carbon buildup, maintaining engine performance, and reducing the risk of detonation.

So we will be installing an Oil Catch Can on our build and do and update every 2500 and 5000 Miles. Stay Tuned.....

Anyways i will put one on and give it a try see below1

https://www.4runner6g.com/forum/threads/burger-motorsports-jb4-oil-catch-can.9981/

 

[KingYota26]

I ran the J&L catch can for many years on my 19 raptor. It worked great. Was hoping they make one for the 4Runner. Reached out to J&L and below was their response. Hope this info helps everyone who is considering a catch can for the gen 6 4Runner.

“The 2.4L Turbo engine in the new 4runner, Tacoma and Highlander doesn't have an accessible PCV line. The PCV is built into the cylinder head and connects to the intake manifold through the flange. This makes it all but impossible to interrupt with an oil separator.

Due to these reasons we have not come out with an oil separator for these.”

 

[127.0.0.1]

This toyota engine already has it's own oil catch system. it is not just a PCV valve redirected to the intake like old-school, it is more involved.

and yes gloom and doomers, 'oh you need a catch system for ultimate performance and engine longevity'. no, you don't. not with toyota D4S motors.



This is a fully closed-loop PCV system with an integrated oil separator (Ventilation Case #1). It's more sophisticated than a traditional single PCV valve setup.

Key Components:

Component	Location/Function
Ventilation Case #1	Integrated into/near the valve cover; acts as the primary oil mist separator
PCV Valve	Installed in the cylinder head (not on the valve cover like older designs)
Intake Manifold	Has molded-in crankcase ventilation passages — no external hose needed for this leg
Fresh Air Feed	Comes from the air cleaner for pressure balance

Blow-By Gas Flow Path:

1. Combustion gases blow past the piston rings into the crankcase
2. Gases travel up into Ventilation Case #1, where an initial oil separation occurs — heavier oil droplets fall back down to the sump
3. The remaining oil mist + gas passes through the PCV valve in the cylinder head, which also:
   • Acts as a one-way check valve (prevents backflow/boost pressure from entering crankcase on turbo engines)
   • Further separates remaining oil mist
4. The cleaned blow-by gas flows into the intake manifold via molded internal passages and gets re-burned in the engine
5. Any separated oil drains back to the crankcase

Why This Matters on the Turbo:
Because the T24A-FTS is turbocharged, the PCV valve must handle boost pressure conditions. The valve prevents pressurized intake air from being forced back into the crankcase under boost, which is a key difference from a naturally aspirated engine. The integrated oil separator in the ventilation case reduces oil from being pulled into the intake under the strong vacuum generated by the turbo system.

 

[Joestac]

</conversation>

 

[127.0.0.1]

On the Carbon Buildup Point:
The T24A-FTS uses Toyota's D-4ST system — both port injection AND direct injection. The port injectors spray fuel directly onto the backs of the intake valves, which:

• Washes the valves with fuel and detergent additives continuously
• Eliminates the carbon buildup concern that plagues pure direct injection engines (like the old Lexus IS 250)

So yes — the whole "you need an aftermarket catch can to prevent carbon buildup" argument largely does not apply to this engine specifically because of the port injectors.

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