Toyota Drops v6 Going 4 Cylinder Turbo | Everything You Need to Know about the New Engine

Hello and welcome to the car care channel, so Toyota decided to remove the v6

engine

from the 2023 Highlander and replace it with a

turbo

four-

cylinder

. Many of my viewers have contacted me and asked me what's

going

on. Could you comment? Could you tell me? us why are they ditching the v6 and why is

toyota

jumping into the

turbo

world especially after they had some issues with the tundra? Well, in today's video we're

going

to talk about the new four-

cylinder

. turbo

engine

, let's go a little deeper into its technical specifications so you

know

what we're getting into and then at the end of the video I'll share with you my opinion on it and whether you should be worried about this or not, but before we start, If you are new to the channel, welcome, consider subscribing to the channel, check out some of my other videos, if you are an alternative subscriber, thank you very much for watching another of my videos. videos without further ado let's get right into it so the new four cylinder engine was officially called t24a fts and this time

toyota

ditched the v6 not because of fuel consumption believe it or not because the v6, the 2g rfks Upgraded got decent fuel mileage for such a large amount of an engine as it is in the type of power it puts out, but this time it's purely for emissions.

Many people ask during the Toyota era when they replaced an engine, like when they went from the old V8 to the new V8, and they wonder why? They do it because the new v8 makes almost the same power as the old v8, it's all about emissions folks, and 2023 is going to be a very difficult year for all automakers because the government, at least in the US ., and I'm pretty sure around the world the bar was raised for the automaker too, so they had to rush to update things and this has probably been brewing in the background for a while, but let's dig in in the new engine, it's a 2.4-liter four-cylinder. cylinder direct injection and port injection, so it had the d4s system as before and the best way to describe it is that it is a very very similar engine, almost identical to the a25a fks found in a camry rav4 venza, many models , even the highlander hybrid yet. has the a25a, if you've been watching my channel you

know

a lot about this engine because we talk about it a lot, so it's not exactly the same engine, it has a slightly smaller displacement, but the internal parts are identical, the technology is, but there are some differences. which we're going to cover in this video starting with the mechanical stuff let's talk about it because this is where there are some differences so the first image that you saw when Toyota announced this this engine is actually not completely new so that's why it started with the nx350 is a 2.4 liter four cylinder turbo but the first thing you notice is the engine cover in all the videos I made on my channel, every time we talk about the engine cover I tell you it's not just a pretty cover , it's there to isolate the sound and just keep the sound down it has final sound material underneath it but this time it actually has a real purpose and you don't want to take it off and throw it away like some of my viewers said they did this time.

It channels air from the cooling fan over the engine and over the turbo and then back down. It's like an air channel. If you look at this image, its shape is like a channel and if you look at this other image of the nx350 engine. it actually has a kind of passage like a duct almost when the hood is closed it becomes a duct and channels the air, that's cool, many other manufacturers especially our German brothers have been using this for a long time and in a A bit of a disastrous way, but this is a Toyota, they took their time to start using the engine cover as a sort of duct to cool things down and control airflow.

If you went from the engine cover to the valve cover, things would change dramatically with the valve cover and there is a reason for that, which is why the valve cover is still plastic. Many people have their opinion about plastic valve covers, but so far from experience I haven't seen any problems with the a25a. Many examples with over 200,000 miles with no leaks or problems. cracks or breaks, so let's call it that for now, okay, but the main difference is that the 825a is direct and injected into the port at the same time. This remains the same, but the location of the direct injectors changed.

It used to be correct. under the intake manifold on the side of the cylinder head, now they moved it to the top, similar to a supra kina, unfortunately similar to how BMW does things, but the difference is that you have four injectors on the top right, at the spark plug side. so you have spark plug tubes and then four injectors, that's really the biggest difference here and there's a reason for that too, they didn't just move it because the area where the direct injectors are on the a25a is used by something else we'll talk about this at one point, so because of this change the whole valve cover had to be changed, there are more holes and more things going on, but because of that there are now two gaskets for the valve cover, an interesting design because it's the middle.

The area has a separate gasket from the outside of the full valve cover gasket and that's because the center area actually has no oil because that's where the injectors go and instead of having spark plug tubes, they just have a gasket around the entire middle. area and no oil reaches, that is the main difference in the valve cover. Now surprisingly to me the vbti system was completely changed because on the 825a the exhaust side is oil controlled. It has a small controller located above the timing cover. just this little plunger that pushes on the oil control valve that's inside the cam gear and that changes the timing.

Pretty simple design. They have been using it. In fact, the V6 we're phasing out here uses that same system. Very simple, very bulletproof. doesn't have many problems but on the a25a on the intake side it had vvti e which uses an electric motor as seen here it's a complicated design that works brilliantly and these don't have problems again examples with over 200,000 miles. I've proven it, but now with the turbo engine they got rid of that. Now they both have oil control, kind of old school if you ask me, but that's what they chose. Some people will be happy because some people were nervous about the engine running. but now we don't have that new engine, it's very, very simple, you have two electric solenoids that activate the oil control valve that is right there, you can remove that oil control valve without removing anything, just remove the solenoid, actually a super simple design.

Aside from these mechanical design changes

everything

else is very similar, you still have a variable oil pump which has a variable ratio so oil is important and looking at the picture something is interesting. Looking at the picture they posted it says zero w20 so this doesn't have zero w16 like the a25a potentially due to the turbo but the oil pump is still variable so you

need

to stick with the correct oil that is recommended in the manual of the owner, like the a25a, is a chain driven motor, still two. chains, one for the cams and then another small one that drives the oil pump in exactly the same place, basically when you go from the block down, things are very similar to the a25a, they are not exactly the same, but the design cylinder heads similar are different due to the direct injection injectors. but

everything

else is very similar it still has the dual front timing cover, it's like you see in this picture, there is actually an a25a, there is a cam cover and guides and everything, then there is another cover, so the area between the cylinder head and the block is still still. floating, that's something that used to leak all the time where the cylinder head meets the block and the front cover, they got rid of the a25a and this engine also has the same thing which is cool, this engine also still has a fuel pump empty. the rear, I mean, everything else is very similar in the mechanical aspects, so the turbocharger on this new engine, the turbocharger on this engine, is actually located in the rear, not towards the front, towards the back , which is not the ideal place for the turbos because that is really the The area where all the heat is concentrated is a little more difficult to maintain, but we have the airflow going to the rear which is really nice and then the Another thing is that you can remove this turbo from this car without removing the engine.

We looked at some others. Manufacturers have to take out the engine to take out the turbo, that's not the case with this, it's a little tricky on all wheel drive models, you may have to pull the driveshaft, but it's doable in the car, which It's good now. an oil and coolant cooled turbo there is nothing special there and believe it or not things are a little old fashioned with this turbo because when we go to the tundra and the problems they had with the wastegate and all that was because the wastegate was electronically controlled which opens and closes that wastegate to control the pressure of the turbo it was actually an electronically controlled motor that moves it back and forth and that's how it acted, but in this one it runs on vacuum, very Toyota likes to go old school on things like that.

If it ain't broke, don't fix it, possibly they learned a hard lesson with the tundra. Now this one works with a vacuum, but the good thing is that since it works with a vacuum, it is a much simpler system, just a small diaphragm that pulls the discharge valve open and closes it and they have a solenoid that you see in the image that was published. It is located right above the air filter, which is actually the solenoid that controls the wastegate actuator. Very simple design. There are two vacuum hoses. There really isn't much to do. but the nice thing is that when the turbo is not creating pressure, you are at lower revs or you are just not using the turbo, basically the wastegate will open completely and pull that flap to open it completely, so basically it happens bypasses the turbo and now you don't have that turbo backpressure, you're not spinning it's building it up unnecessarily, it just swings it wide open, the exhaust comes out and it doesn't do anything to the turbo, a pretty nice little touch that really makes a difference. and then when you

need

to build boost, like if you're accelerating a little bit harder and with a higher load, you'll close that flap and start building up pressure and kick in a turbo.

Pretty good design, there is a little touch, but it makes a big difference. reliability, believe it or not, now the intercooler is an interesting setup because it's kind of a split where things are a little bit old school, a little bit of new stuff in modern, the intercooler is not air to air, it's liquid air, very efficient. very compact, actually a liquid to air intercooler is nice to have. The location of the intercooler is what is interesting and why they had to move the direct injectors to the top because it is located directly below the intake manifold.

It's actually a good place for it because again. it has some of that airflow going through the cool stuff from the fan with the engine shroud we talked about. It's actually right there, a fan as soon as it hits, it hits you first and then goes up and down, so it's a liquid. -air intercooler, so there are two coolant circuits in this engine, just like the tundra, the tundra has something similar: it has one coolant circuit for the engine and then it has another coolant circuit for the intercooler, now that The coolant circuit for the intercooler uses a small electronic water pump similar to the one on the Prius that you know, for the inverter pump batteries it is actually exactly the same design, same shape, I imagine it could cross between them in part, but this is how you do it, then you have another radiator in the front that just separates the radiator to have three radiators, one for the engine, one for the intercooler and then the condenser is technically considered a radiator as well.

Let's talk about some other changes to this engine from the a25 to the t24a, so the first changes will be Make a lot of people very happy, this engine has no egr, unlike the a25a, there is absolutely no egr, not at all a very welcome change because the egr systems, in certain driving conditions, could clog up and cause all the problems, if you don't believe me, ask 3rd generation prius owners. I'll tell you everything, well the A25a has no history of egr problems yet, but on the new engine we don't have it, if you don't have it you can't have problems, so there's another thing.

It is the pcv system, it is slightly different from the a25a but similar at the same time, let me explain to you, so they integrated the entire pcv system inside the intake manifold, which is very small, it is much smaller than that of the a25a and the valve pcb still it's found. in the same place as the a25a, there is no way to replace it without removing the intake manifold, which is smaller,so it's easier, it doesn't have the whole agricultural element attached to it, so it's going to be a lot easier to repair the The catalytic converter is interesting because it goes around and back, it's not your average, you know, the standard catalytic converter just goes down due to the turbo which the turbo does not have and which does not allow the exhaust to simply connect to it. the bottom part has to go to the side, so the catalytic converter is kind of a giant behemoth that plugs into the side of the turbo, but otherwise it's just another catalytic converter, but the cool thing about that catalytic converter is that it's very hard to steal so I guess that's a benefit because it's hidden right next to the turbo it's almost impossible to cut it off and just take it out it's just not going to happen so that's a big plus and last but not least important, in the different.The thing is that there is no thermostat on this engine, so believe it or not, the A25a has had some problems lately with the thermostat heating up, they just shut down.

I don't know why we have a heated thermostat but the new engine doesn't have a thermostat, it has a coolant flow valve similar to the a25a but it doesn't have any thermostat so that's a plus because this engine will heat up very quickly. I know some people will worry why we can't just have an old school thermostat that works, but actually folks, the coolant flow system works much better, it's just an important part that controls the flow of coolant to where should go instead of having that mechanical thermostat, so should you worry about this engine being turbo now? all reliability is going down the short answer is not a long answer let's talk about it folks this engine is heavily based on the a25a which has a great track record so far so this 2022 camry hybrid behind me is my personal car, has a 25a now the turbocharged side remains to be seen, however most other manufacturers have been making turbos for a long time, if you felt like Toyota was never going to make turbos, I'm sorry to say we saw it coming, it was just es a matter of time before they held out as long as they could the problem here is not gasoline consumption the problem here is pure emissions 2023 is going to be a very difficult year and until 2024 25 things are getting really difficult here with emissions standards The government meets EPA emissions requirements, that's the way it is and manufacturers have to comply unless they want to pay ridiculous fines here, so the v6 is gone as much as I will miss the v6.

The new engine looks good because of a25a I think the a25a has been great. If the new t24a performs the same, we are doing very well, but one thing I will do here to help potential future buyers of Toyota turbo engines very soon here on the channel I will be filming a video. what not to do with your turbo engine from day one so you don't have any problems and see this engine last the usual 250,300,000 miles and hopefully there will be more in the future and before I end this video I will say this, they will potentially have small problems the first, you know, month two three, to play it safe, wait between six and eight months until they solve the problems and if you have to buy the car, you have a warranty, don't worry, that's all. this is what the tundra crowd did to themselves they actually put themselves in this position where this is not a good truck i bought a lemon this and not that you will fix it and life is good this is how it is for What cars have a warranty, so if you don't want to deal with this, wait six to eight months and life is good and before I end the video I want to say one thing, in Toyota's press release they said that the new engine 2.4-liter has 265 horsepower and uses balance shafts for super smooth performance.

Many people will see this and read it. Let's clarify because that was a typical marketing passage. It makes absolutely no sense. Makes. No. They don't look good. in the eyes of someone like me and now it would be you because the a25a has a balance shaft the 2ar fe engine before has a balance shaft the 2azfe engine The 4 cylinder engine before has a balance shaft and the engine before that the 5sfe also has a balance shaft because most four cylinder engines have a balance shaft so they don't vibrate the car and make your call ring, that's just it was interesting to see that statement because I don't remember the last one time I saw her. a force on it does not have a Toyota balance shaft maybe with some of the smaller engines but not with the four main cylinders, let's put it this way, if you read that there is nothing new about the balance shaft, most of These four cylinders have a balance shaft, so I don't know why they use that as a marketing element in their press release, but in case you're wondering, now you know it's nothing special for four cylinders to have a balance shaft. balance axis or at least most of them, I hope.

This video is useful informational. I hope you learned something new. If you like it, consider giving it a like if you are not subscribed. Consider subscribing to the channel. Watch other videos and until the next video, friends, may the Lord bless you. I keep you and have a wonderful day.