Destruction?! Inside the Blown Toyota GR Yaris Engine

[@titusvarughese5071]

Stick to driving automatic lol

[@RobertMitchell]

Stick to Twitter

[@ludda42]

It happens man. Drive enough and it happens

[@Tristan.R.J.M]

@@RobertMitchell 📣-📣-📣- 📣!!!

[@titusvarughese5071]

@@RobertMitchell 😝😝

[@paulomoniz7326]

Not really.

[@tomstamp]

Have you tried turning it on and off again?

[@john-martin]

That wouldn’t help because the rocker actually fell off the bearing, nice thinking though.

[@tonycarpaccio9550]

@@john-martin whoosh?

[@makesense1607]

@@john-martin It was a joke.

[@xthilox]

Or maybe Robert had just no fuel .. i would have checked that before open the engine 🤷🏽‍♂️ 😂

[@RobertMitchell]

Good idea let's try that tomorrow! ;-)

[@matthewmahy2604]

Fascinating to see the insides of the engine on such a new car, and great to have a dealer that lets you get in and see the work in progress like that. Love these technical videos, please keep them coming.

[@RobertMitchell]

Couldn't agree more! The guys at the dealer are really cool and I can't thank them enough for letting me make this video for you guys :-)

[@jorgschneider4907]

@@RobertMitchell I rebuilded my old Celica gt4 for Weeks at their garage. They are very helpful and Michael is a great Chief. Bekim and Waldemar are my tier 1 mecanics!

[@gergoantal1066]

@@jorgschneider4907 I love the Celica GT-FOUR

[@Thisonegoestoeleven666]

@@jorgschneider4907 My friend’s Dad got a Gt-4 when they first came out. Will never forget my first drive in that! Great car.

[@SparrowNoblePoland]

What car makers won't tell you that power output relative to engine capacity in modern turbocharged engines is such as it was it group IV (highest competition class) cars in the early 80s, while materials remained the same. In most cases, no magnesium, no titanium, no ceramic alloys, just iron, steel and aluminium. Back then these engines were supposed to do 3-5 thousand kilometers before a complete rebuilt. These modern engines are effectively competition engines and owners should have over-average technical knowledge if he doesn't want to damage then in no time.

[@MrHaun]

April? C'mon now, overnight parts from Japan. That's the Tier 1 solution.

[@RobertMitchell]

I don't want to flex too hard, ya know?

[@sooofancier]

@@RobertMitchell Are you planning April Fools day Robert?? Hmmmm you are suspicous...

[@DiscoR53]

You can’t rush quality.

[@alexandrepf8471]

Overnight parts from litchfield

[@doctorscoot]

Given this is a homologation model, I would have thought spare engines would have been available for racing teams? Maybe you have to order the spare engine when you buy it.

[@mgcharoudin]

Dead Head Redemption!

[@TheMilenkata]

Hahah, that was good

[@lewistheberzerker]

🤣🤣🤣🤣🤣🤣🤣🤣

[@theraggededgeonboardfastes8461]

The curse of JWW ??

[@nunyabinis]

Hopefully an Apex Yaris tie dye sticker is coming soon!

[@rustler08]

Why not Head Dead Redemption?

[@tjones002]

As a mechanic, I absolutely LOVE how apparent it is that Robert has wrenched and built engines himself. Also, how awesome of the Toyota dealer to let you film this in there!

[@HardcoreMotors]

Good thing you pointed out the engine. I thought it was a coffee machine.

[@RobertMitchell]

It's crazy how small this motor is!

[@playwme3]

Triple boilers with a Milk Frother hanging off the side.

[@Mistabushi]

I like how the host counted cylinders, one two three, I can confirn there should be three cylinders in this particular engine

[@Dan23_7]

@@Mistabushi I thought the same 😂 We’d still be listening if it had say 12 cyls

[@Mistabushi]

@@Dan23_7 damn right haha

[@ddmk11]

I enjoyed watching this with my son who is seven he found it fascinating .....Thanks.

[@RobertMitchell]

Greetings to you son David!

[@KirkVSSpock]

You're a nice and honest guy Robert. Without saying anything, with no warning from the computer, the cost would have been fully taken on warranty, come on Toyota, give Robert a discount ! Loyalty pays, this would be a great example.

[@vornamenachname9080]

I agree but usually by using cars on track you loose warranty anyway, but yes it would be nice if they would share the costs, the rocker arm shouldn´t have failed at such a small overrev, i think this was a material issue anyway. I did the same with an BMW 430i at the german Autobahn, wanted to shift to 4th at around 130kph and accidently choosed the 2nd but luckily nothing happened my first ever missshift :D intersting how many lights can flash at the same time in a modern car cockpit and the engine turned off immediately automatically :D:D but tbh it was the only way i ever found to switch off the ESP System. Because i was still roling and restarted the engine there was an ESP-failure which took it off :D:D but I wouldn´t recommend this.

[@KirkVSSpock]

@@vornamenachname9080 Nurburgring is NOT considered as a track in Germany ;-)

[@vornamenachname9080]

@@KirkVSSpock 😅 just waited for this answer, this could be a nice meeting at the court. Customer: it is a legal road not a track! Tyota: okay so, why you are going 200+ on legal Road where 100 is allowed, maybe we should talk about your mental ability to drive a car on public roads. Customer: okay, how much is the engine:D

[@rishabjain7864]

In a way you've effectively done an accelerated stress testing on the engine and highlighted the component most likely to fail (the bearings for the valve rocker arms) Something for Toyota to pick up and work on in their next iteration.

[@Richard_AKL]

I think it's the other way round - I think the big rev difference stretched the chain, caused the timing to go out so the piston hit the valve, and that's what caused the other damage... pushed the valve up while cam follower was trying to push it down, and then it was just a matter of time until the follower failed and caused the valve to drop which was when it got bent

[@jamescaley9942]

It's a thought but you cannot normally extrapolate from an abnormal situations. There was a famous airbus crash after the pilot gave too much rudder inputs which took it beyond the design limitations and ripped off the tail. Pretty sure they didn't try to strengthen the design after that.

[@MrLundefaret]

@@Richard_AKL sounds reasonable

[@rishabjain7864]

@@jamescaley9942 I agree they might not do anything about it, especially if it was a user error, but continuous improvement is the Toyota Way after all. So who knows...

[@bkdore]

@@Richard_AKL If the timing chain had stretched then the whole cam would be off and other valves would have hit pistons too. Roberts explanation is much more likely given just one intake valve was affected.

[@peterjansen5571]

In my opinion as a former employee as a engine rebuilder in a shipyard this bearing did not fail in the over rev situation. If it should fail during the over rev it would be because the valvespring couldn't keep up the pace of the engine and the Inlet valve didn't close in time resulting in contact with the piston. Then the valve hits the rocker with too much force and the bearing fails. The engine would fail at the same time as the over rev because the valve would bend at the same time. Not the next day after sending the car 5 more laps. I think warranty is a possibility. BTW why did they take the engine out? I can't imagine that they would take it out for a headgasket we're basically the same parts come of the engine. Thanks for the video Robert. I was waiting for it👌

[@6pistons]

We get to see the engine partially disassembled, real cool.

[@RobertMitchell]

Hey Marlin, glad we managed to get down to Toyota to show you the engine whilst it was in pieces! Thanks for watching :-)

[@DanijelTurina973]

I'm far from being an expert, but if the ICU doesn't show over-rev, it would indicate that the engine remained within manufacturer spec, and the actual cause of the breakdown was a manufacturing defect inside one of the bearings, which might have been revealed through a slight over-rev, but then again, it might have just failed after a heat-cycle. In any case, I think Toyota should think about covering the expenses.

[@jmblur]

Agreed! If it was still within spec enough that the ECU didn't log it, it sounds like the overrev was minimal and possibly still within red line. Of course, I'm not sure Robert cares so much about the cost of the repair on a Yaris compared to a lot of the other cars in the fleet, the downtime is a lot more costly than the repair. I appreciate Robert's honesty but this is definitely a situation where a causal omission would have gone a long way. That said... Misery means clicks, so he probably will earn more money admitting it than not!

[@ArKritz84]

It's an interesting problem. Whether there is enough data logged to get a meaningful sequence of events out of it, whether the parts can be X-rayed or microscoped to expose a potential weakness etc. Maybe get Toyota interested and ship the damaged parts to Japan? In retrospect, as long as there is no overrev logged, it *would* have been a warranty job.

[@kreiseltower]

I think the cause might be not even the over-rev per se but the over acceleration of the affected parts. Just to put in some numbers going from 2000 rpm to 7000 rpm in 5 milliseconds might be ok for the bearings and lubrication... and springs... but going from 2000 rpm to 7000 rpm in 0,5 milliseconds might cause damage like ejecting a retainer pin although the engine isn't really overreved.

[@kain0m]

@@kreiseltower na, accelerations isn't an issue for the rockers. At 7000 RPM, the cams are rotating almost 60 times per second. So the rockers are going up and down every 20ms. Acceleration of the engine wouldainly hurt the transmission, and maybe the timing chains, but not throw a rocker off.

[@kreiseltower]

@@kain0m I do not mean acceleration of the car, but angular acceleration of that bearing where the rockers sit on etc... I don't remember exactly, but how does that axle of the rocker mount sit on that bearing? Is it a press fit? There must be a (design) limit on how fast you can accelerate or decellarate from one rev. number to another and this could have been the failing point.

[@timdunn2387]

Robert, you must be very proud to be the first in the world to grenade what is already becoming an icon auto. Congratulations! (PS; said with love and irony)

[@RobertMitchell]

❤️

[@I999-g2s]

‘Ultimately’ one of the more cool videos you guys have made - thank you, really learned a few things from this whole story. Narrowly missed a “money shift” myself on my gt3, boy am I glad!

[@RobertMitchell]

Man I’m glad you didn’t buzz the GT3!!!

[@I999-g2s]

@@RobertMitchell I was incredibly lucky, I shifted to 2nd and began to release the clutch when I saw "2" on the dash in front of me and 'clocked' that wasn't what I wanted to do, I had hardly released the clutch by a few millimeters. The 991.2 shift is incredibly close across the gate.

[@RennieAsh]

Isn’t it difficult to put it in such a low gear at speed or are synchros very good these days?

[@I999-g2s]

@@RennieAsh perhaps it was the 'resistance' that I felt that made me aware of the mistake I was about to make, but I'm pretty sure it would have made the shift. Certainly, there are others who have made a similar mistake (with disastrous consequences). I find the manual box in the GT3 to be a bit too easy to shift (little resistance as compared to say my old 997), couple this with the short throw and very closely stacked ratios, and it's almost a recipe for disaster (certainly for hacks like me).

[@RennieAsh]

I999 I don’t like changing gears overly quickly because of such things lol. I don’t race though so it doesn’t matter :)

[@TheDrAkira]

Those cylinder walls are THICK! Thanks for showing us this little beast!

[@raymondk2202]

short term heat absorption/capacity

[@SebastianBlix]

I was just thinking that! Open deck was a surprise, but those walls are thicc

[@sids2498]

Robert first off, kudos for looking at the silver lining even through a bad experience. Second, I appreciate your taking the time to explain all of this to noobs like me. Much appreciated!

[@rotarolla1]

This is more interesting than watching it drive round in circles

[@RobertMitchell]

I agree. More costly but more interesting

[@heroes1125]

I second this. Its interesting to see how they able to pack a punch in this small 3cyl turbo engine and other bits

[@Gabriel83580]

For those of us who have a interest in this engine and it's engineering, we find this video very educational and give us a small idea of what to keep a eye out for,when it comes to high Rev. The fact that you showed us the physical part's while explaining the damage results and your plan for the rebuild got my attention being that this engine is becoming more popular in the automotive and car world. So thank you.

[@medilyesoudhini7411]

Thank you Robert for this lesson on the inside of an engine, I really learned a lot

[@RobertMitchell]

Glad it helped

[@richardwallinger1683]

superb video .. lucky owner .. at 76 years old I tend to baby / granny my motors . I believe my Perodua Kelisa car has the Toyota Yaris three cylinder motor . It is so nice to see how well built the engine is .. That piston is perfectly usable .The chance of a failure goes up exponentially with RPM. and of course mileage .I ran three engines when I won the 1980 Donnington GT championship. the practice and race engine had the cylinder head removed the camshaft buckets were inspected and the valves re seated with 1mm wide rounded seat faces . Apart form a broken crankshaft at Oulton Park racetrack . I never had an actual engine failure .9,000 rpm max self imposed rev limit .on a much modified 1 litre Hillman imp engine .

[@Darkacces]

I've seen every video on the blown engine Yaris GR, and specially on this video, I can tell that you are really passionate about Cars. It's not only for your technical knowledge, it's also for your driving style to take care of the cars, the technical and not technical chats, and of course, for a little thing called apex. Hoping that if in a near future I travel to Germany, could stay in Apex and have that nice experience of the Nürburgring with people who just love cars. Greetings from Argentina!

[@RobertMitchell]

Thank you EU. Enjoy Argentina (dyana from apex family is from there). We’d love to see you at the ring

[@CGL43474_C]

Man. Watching stuff like this brings back some pretty good memories of automotive shop class in grade 9-12 for me. I live/went to school near a General Motors office, so our shop was all old GM V6s and similar, plus a Chevy cobalt that I think was like an original late-stage prototype (looked like any other cobalt, but I think it came from the engineering dept.) test car that got donated to the school. Our teacher wasn’t super well organized, so most days in grades 9-10, we were just told to go take something apart and put it back together again. One “big project” we did through a semester was taking apart and reassembling one of the old engines. Good times. (And looking at it now, I write that like it was ages ago, but it wasn’t _that_ long ago).

[@rodneyyy95]

I am a bit of a self taught "mechanic", so this was actually interesting to watch, and thank you for the clear explanation Robert!

[@mudachuka12345]

The most fascinating thing about this video is how knowledgable Robert is when explaining I didn’t expect that.

[@davidsmall7676]

Robert, very impressive Tech Talk. I enjoy the in depth sharings when dealing with fixing and improving the fleet. Thanks! Glad that the catastrophic failure was not a total catastrophe. Looking forward to the next part of the rebuild and a return to the Apex fleet for laps.

[@doctorscoot]

Toyota engineering is pretty incredible at making their stuff compact, buildable, maintainable, and generally bulletproof. Lots of other makes tend to get only 3 out of 4 of those right (some less lol). That engine is a work of art.

[@jrchismorie]

Today on Engineering Explained... great stuff Robert!

[@RobertMitchell]

Thanks for the support! Glad that you enjoyed the video :-)

[@Runoratsu]

Missing a whiteboard for being EE! 😄

[@bigcraig1976]

love how you can explain how your engine works and how it failed in a way that anyone could understand

[@geek9642]

Just a thought you could ask Toyota to fix it for free and pay you £25k for the privilege, then get a commission on future sales.

[@RobertMitchell]

On it

[@The_driftologist]

Amazing technology 👏. All this power from this small block .

[@beaver9757]

So sorry this happened to you, but it is making some great content. Great video. :)

[@RobertMitchell]

Thanks so much! It sucks that it happened but I'm glad that we are able to draw a positive from it in some way :-)

[@alistairl]

Thankyou for the explanation, the last video was quite forensic and seeing the parts adds to the understanding. I really appreciate you taking the time to do this!

[@alistairl]

Quick question - that you could see the marks on the top of the piston compared to the main surface looked like something had worn off - was this a coating or simply carbon/soot from normal engine running?

[@MrE30]

Afternoon Robert thanks for sharing the break down of the engine and causes and glad the damage was minimal 🙏

[@Paul_VanGo]

Possibly soon the most watched automotive video? It's the unicorn of unicorns! Finding content about broken McLarens, Ferrari's and Mambo's is no problem at allj

[@RobertMitchell]

Heheh broken mclaren. Take your choice and get some popcorn

[@Paul_VanGo]

@@RobertMitchell Proves my point.

[@1rayljr]

Admire Robert for the honesty and taking responsibility for the damage. Time will tell if the over-rev was actually severe enough to cause the problem, or if we will see similar failures in other GR Yaris in the future. I do find it a bit interesting that only the one rocker arm bearing was damaged from the over-rev.

[@RobertMitchell]

Hey man thanks for the comment. Yes sometimes you just gotta be transparent with these things, things happen and we just have to overcome it. :-)

[@stickshifter8]

Not the first youtuber to get a GR Yaris, but the first to toast one! Robert, in my dictionary, that’s definitely Tier One!! Cheers!!

[@RobertMitchell]

I’m always the first

[@andywong5606]

Thank you for sharing the progress of your GR Yaris motor. Your failure analysis skills are pretty good! If the ECU log doesn't show an over rev, I'm wondering if there was a manufacturing (assembly?) defect from the factory.

[@thelokoone1]

Thank you for taking time to make an informative video out of this misshapening Robert. It was pretty cool to see that little beast engine with so much detail

[@ewaldelfering]

Love the transparentcy off apex so cool.

[@hensh911]

This is one of the most interesting videos on this channel. Great to see Robert's knowledge.

[@derimmor]

Lets see, if this problem apears in some other Yarises over time, then it maybe some manufacturing fault. Light overrev should not cause that rocker arm bearing center pin come off loose.

[@europeinvasion3057]

YARIS CRAP

[@boboutelama5748]

It depends of the engine. I remember my bestie, that wa driving the shit out her Mazda MPS. She also had engine failure, but was driving like a maniac, missing shifts all the time. When the engine gave up, she claimed a malfunction of said engine. But I guarantee you, she would have broken ANY car in driving like that.

[@SROC276]

From your description and the computer saying it wasn’t really an over rev...I am still surprised the rocker arm gave in. Seems like it was a pin failure issue or valve retainer clip failure due to a defect. I would think Toyota knows these cars were going to be raced and driven hard. Accidents happens but tolerance levels would have taken care of it without issue unless you discovered a failure point. Would not surprise if a few months from now they have updated parts and changes to this engine to take care of it. I’ve overreved a few before but have never experienced a failure. It’s interesting indeed. I agree it should be covered under warranty regardless of Tier 1 baller status. Thanks for sharing...am sure many new owners are watching this with enthusiasm.

[@TankRust]

Great breakdown on the failure Robert! You really dodged a bullet if all of the debris stayed in the top end of the motor. It wouldn't take much for one of those needle bearings to make its way into the bottom end and cause some major carnage. Good call on replacing all the rockers, they all endured the same overrev and I wouldn't want another one to decide to let go shortly after the rebuild. Any thought of trying to source some forged internals and upgraded valvetrain "while you're in there"? Keep up the excellent content!

[@kings3803]

Nice to see you are not taking any risks when it comes to replacing parts that are even slightly damaged which is the smart move when you are going to be thrashing it round the ring.

[@46M111]

So if it wasn't over revved how high was the peak rpm recorded in the ECU?

[@levisalvini4110]

I will love to know that too!

[@schmo7777]

He said like 13k rpm.... So, I'm guessing revved to like 9k and damaged but not destroyed? Think they ecu would record 2k over redline, and figured you need at least 2k over to damage and dismantle parts like here

[@hristohristov8787]

It's your lucky day Robert,there is no better scenario in this case.Thanks for the video and good luck!

[@RobertMitchell]

Very true; It could've been way worse! :-)

[@macfady2181]

Great walk through, appreciate you taking the time to lay it all out.

[@RobertMitchell]

Hi Mike, thanks for watching the video! I'm glad that you liked it :-)

[@neilcajote]

for Nürburgring gear ratio, 2nd gear is 1.6, 3rd gear 1.32, 4th gear 1.08, and 5th gear is 0.93. If Robert is revving 6,500 rpm from 5th gear and shift directly back to 2nd gear, therefore x=6,500 rpm divided by 0.93 multiply by 1.6... So probably he was revving 11,182 rpm @ 2nd gear.

[@RobertMitchell]

Keep in mind if I was going 5 to 4 I would not have been at 6500 in 5th. I would have been lower than 5000 in 4th otherwise there would have been no reason to downshift;-). So go 5000 in 4th down to second and you have your number.

[@RobertMitchell]

Id guess 7500

[@OrionVX]

Tier 1 content! Inside look on a new engine, really inside :D

[@RobertMitchell]

We definitely don't do things by half on this channel haha ;-)

[@ArKritz84]

Really inside, but not really new. At least not anymore. 😂

[@mkkoper]

Well, technically it’s only half of the engine 😂

[@silkysixx]

I wrote this comment with hate in my heart because I work in finance and am studying engineering, and just lost my cool about this very successful person having what I thought was poor attention to detail. What he actually has is the resources to have other people take care of this stuff and is also sharing the journey with us - both of which I both appreciate and respect. I've deleted what I originally wrote because it adds nothing to anybody's life, least of all mine.

[@RobertMitchell]

At what point do you think that the locks came out? You’ve sure come in here with an attitude didnt you?! 1. When do you think the locks came out 2. when do you think the valve hit the piston?

[@silkysixx]

@@RobertMitchell Either the spring surged massively and let the locks out OR the piston hit the floating valve, jamming it in the guide, which would cause the rocker to slide off the stem, onto the retainer, letting the locks out. It doesn't make sense for an over-rev to cause a needle roller bearing to fail before anything else. It's the one part with no reciprocating energy.

[@RobertMitchell]

@@silkysixx so you think that the valve hit the piston at the time of the overrev?

[@RobertMitchell]

I asked a 2 part question to keep you focused and organized and you missed even that.

[@silkysixx]

@@RobertMitchell I can't believe that the rocker failed first, so it had to be the locks coming out or valve-on-piston violence that kicked it all off. Both would require some mighty spring surge, but are possible.

[@jkl6868]

Nice little motor, thick sleeves!

[@RobertMitchell]

It's pretty small isn't it, kind of impressive how it all fits together in such a tiny space!

[@jkl6868]

@@RobertMitchell has potential!!!

[@MrGlenferd]

Reminds me of a Vauxhall I found years ago. A valve spring retainer broke and the valve was bouncing on the piston. I straightened the valve and replaced the retainer. Drove the car for 5 years.

[@tracktimevideos5164]

If no over-rev is logged then I would have thought this would be covered under warranty? I hope this is a failure point that is corrected in later cars. Mine arrives May '22.

[@kapsoztatoltott4537]

Can they really read the ECU rpm data back, for 5 laps which is 100+ km? Might have been the good old "Kid, I saw you smokin'..." trick (even though you didn't, obv.)😁🤷‍♂️.

[@jamescaley9942]

@@kapsoztatoltott4537 Don't think the ECU stores a lot of data at all, just the last events, I.e. it is not like a "black box".

[@burningdieselproduction5498]

@@jamescaley9942 Some premium ECUs hold timers which count how long have you been above certain revs. It would look like a given rpm and time the motor was above that. it takes one timer and a reference value and it does not use a lot of ECU memory.

[@WestfieldFreshAir]

@@jamescaley9942 I would expect it to hold some data for this to protect Toyota from warranty claims that are due to buzzing the engine and not being open like Robert has been.

[@tracktimevideos5164]

@Do One lol. You should do a bit more research.

[@zxf1323]

Loved this breakdown of parts and what happened, not hiding stuff and showing what kind of damage does an over rev do, tier 1 content. Keep it up!

[@ronaldjanssen105]

Really love these tech video's. This money shift turned for the better. Tier 1 content ;-).

[@RobertMitchell]

Great to hear!

[@motojojo_]

So very cool! We all guessed the engine was a gem but seeing the whole engine bay stripped out and the parts, it's genuinely impressive engineering. Good call on replacing stuff too, not worth the risk to reuse already stressed parts

[@jonandrews6018]

My girlfriend and I ordered pizza and settled down together to watch this. We liked it .

[@markwood9987]

We did the same but kebab and chips.

[@petermckay4760]

Thank you Robert, this was very educational!! Keep us updated as the rebuild of the engine goes on!

[@pratikagrawal4190]

Tier 1 media💪

[@RobertMitchell]

You know it ;-)

[@petripaa]

That is first class service from Autohaus Henn. Really really cool to see the engine stripped down to parts and also the extent of the damage. I hope I'll get to drive this car later this year given that traveling is allowed again.

[@matmul4850]

New drinking game. Every time Robert says "Ultimately" take a shot. 😁 Guaranteed you’ll be drunk very quickly 😅

[@RobertMitchell]

Let’s do it

[@robertdaniels9460]

Haha this is the only reason I’m in the comments as I found it funny too 😂

[@salsarriba5695]

cany anybdy bssay, how thisd vdeoi ended?

[@mayuravirus6134]

A shot of what!? Vodka!? Whiskey!?

[@fredzephire4071]

@@salsarriba5695 lol

[@BigUpYaRancidCarpet]

Toyota is a great company to do business with. Respect to them for letting you film in their workshops . Bonus content from the exploding Yaris Win Win ... should pay your shoe budget

[@Richard_Turner]

All in all not so bad in the end. Good to look at a positive angle like that. If no over rev was logged have they still said mis shift or mechanical failure?

[@eugenux]

I was just about to ask that as well; if there is no over-revving logged on the ecu, it will be considered mech failure and be done under warranty?

[@davidhunternyc1]

Wow, I can't believe that tiny little engine has that much power. I would expect that engine to be in a 1968 Volkswagen Beetle but not in a 2021 GR Yaris. It's a technological marvel.

[@muttenmagroo]

High compression + direct injection + turbo.

[@davidhunternyc1]

@@muttenmagroo ... otherwise known as hocus pocus + abracadabra + alacazam.

[@jahyoda]

Completely Captivated by this

[@paulkippax4530]

Cheers Robert for showing us around this mighty little engine!

[@itscaptainterry]

I haven't watched the video yet, but I'm sure it's good

[@RobertMitchell]

Thank you Captain

[@itscaptainterry]

Update: it was good

[@kapsoztatoltott4537]

@@itscaptainterry confirmed

[@6spdkeg]

Big power, tiny parts. Got it. Are the valvetrain parts forged? Mainly talking about the rockers and small parts.

[@totojejedinecnynick]

"I love open deck 3 cylinder engines" -noone, ever.

[@RobertMitchell]

🤣🤣🤣🤣🤣

[@bastifantasti82]

@@RobertMitchell You have to do a closed deck conversion at subi performance.

[@NightwalkerUK]

🥸😂

[@nsjaaron]

Yeap close the deck

[@davidofford7002]

It really is great, from three, four or five points of view. You look like you are really enjoying working with thd dealer and their mechanics there. And, as you say, building a relationship! There has been super transparency - for everyone in the GR community - and us too, along for the ride. It feels so quick. And now great to take a rest. The GR, too, warm and happy inside.

[@riseandshinesunshine]

God you’re such a good teacher ! That tops up on the fact that you’re always so humble. Such a good person you are !! I’m happy that I’m following Misha to discover you and to follow you as well now!

[@howtorepairpendulumclocks]

As always, thank you for high-quality no BS content. Those cam shafts and timing (VVT?) badgers are so beautifully made and finished. makes that car so such good value for money! (in relative terms).

[@dehaviland7645]

Robert... This makes you tier A1+... Get some of that Misha...😁😁😁

[@RobertMitchell]

@misha how are you going to handle this blatant disrespect?

[@Sim-903]

Perhaps you should do more this kind of videos. Its way more cheaper and stress free in comparison to the driving videos. Calm and really good explained.

[@jbu89gb]

Were Toyota able to tell you what the max RPM was that the engine saw?

[@mattyoz0]

This is what I wanna know.

[@ghostwrench2292]

Not sure about Toyota but the PCM in a Ford Mustang GT350 told us the engine had revved in excess of 9,000 RPM. That car had been "money shifted" at a track and threw 2 connecting rods into the plastic oil pan and melted them into it. Also crushed the rod bearings and just massive mechanical carnage in that engine. It was pretty cool to see.

[@GHOOGLEMALE]

Yours is the sort of garage I need - I liked how they are to check that piston, but with a view to returning it to service. A good video and well presented

[@billx4266]

Would love to hire that car next summer

[@RobertMitchell]

It’ll be ready ;-)

[@dsman2968]

Thank you Robert. Clear, simple and well explained...so we don't accidentally make the same mistake.

[@unitx445]

I just got more respect for car mechanics....that puzzle would take me a life time to put back togheter :D

[@RobertMitchell]

It’s a hot damn mess

[@ghostwrench2292]

I'm a car mechanic. I absolutely LOVE doing that kind of engine work!

[@ghoulbuster1]

The nut inducing satisfaction when you put it all back up and it starts is pure nirvana.

[@siimu111]

@@ghostwrench2292 Problem is when engine is assembled, but there are still some parts left...

[@AWD_T]

That is catastrophic for any other engine. I’m impressed that there isn’t more damage. I’d be worried pushing these to its limits until there is a better rocker/bearing upgrade.

[@kdoeone]

Oh weird. It's a three cylinder engine. Is there a turbo? I'll have to research this little car. It is turbo. How kool. Great vid.

[@melvynkuan764]

That is a super clean Toyota workshop. Great access and explanation. Hope the Yaris gets back on the road soon.

[@MrTrev69]

Apex rocker arm keychains coming soon ✌

[@RobertMitchell]

And necklaces

[@bnight2]

This is the valuable content I watch your channel for. Keep it coming. Hope your GR Yaris is back on the ring in no time.

[@THENELLYXPRESS]

I would still take out piston 1 to make sure it didn’t compress the piston rings !!!

[@hfracing]

Agreed. Recently helped check a 944turbo engine.. debris had hit the piston and the top ring was almost siezed in the grove as the piston had compressed a tiny amount.

[@beepbop9]

Always amazes me seeing such a small form factor engine with 3 cylinders and knowing how much power these can throw out. Really feels like we're at peak petrol right now

[@SuperWayneyb]

Great content Robert, looks like you dodged a bullet and the damage is still,not good but far less than it could have been. So fingers crossed 👍🤓👍🇬🇧🙏

[@trevorwilson2744]

Pretty cool seeing this 3 cylinder. I work in the engine assembly department at the Toyota plant in Kentucky. Looks very similar to the 4 cylinders we build. Which I guess that'd be a given lol.

[@Pit63]

So the data log read out didn’t max out RPM over redline?

[@RobertMitchell]

Nope

[@Jonathan_Doe_]

Good to know!

[@Pit63]

@@RobertMitchell no over rev! So can you still negotiate for warranty/discount for Tie 1 influencers?

[@RobertMitchell]

@@Pit63 I doubt it. I admitted that I did it so I’m sure that’s enough for them to say no.... right or wrong?

[@Pit63]

@@RobertMitchell at least you are open about it so they should do the warranty under the good well stand point of giving some discount / free parts ...although not much. It would be a happy ending somehow!

[@phillipchandler8862]

Interesting video of behind the scenes operations. All this diverse content makes for a great channel Robert.👌

[@RobertMitchell]

Glad you’re enjoying Phillip !!!

[@phillipchandler8862]

@@RobertMitchell That must be the quickest reply ever.👍

[@RobertMitchell]

@@phillipchandler8862 gotta stay on top of things :-)

[@petrolheatt]

Great tech-talk video Robert! But I really wonder whether the short (and probably slight) over-revving actually caused the damage or whether we'll see more of these damages with time. Hope not!

[@RobertMitchell]

It very well could not have been the cause. But I don’t think we will ever know the true answer that

[@Smt_Glaive]

awesome car , and the engine deserves all the love and care its getting.

[@darjanator]

Dunno if you got lucky, or if it's just a good design by Toyota, but that does look like really minimal damage and I agree that it makes sense to replace all the rockers. If those are the engineered failure point, the others could well be on the way out. You gonna keep that piston? :D

[@motamark]

Thanks Robert for the in depth look at what went on with the over rev !

[@jonleyton7905]

Really appreciate your video! Your next career should be as a diplomat!

[@micsub]

Very informative to see the engine open on such a recent model, that's a very rare sight. As a future owner of a GR-4, I really appreciate you sharing these step by step videos of the Yaris engine failure story. This is also very good publicity for the Toyota Dealer near your place to let you into the workshop. Some other dealers should take this as an example !

[@2of2DCH]

I'm just here for details on the Tier 1 Mitchell Consulting jacket merch.

[@RobertMitchell]

Stay tuned...

[@brockwilliams5533]

SIx or seven years ago a friend and I rented a 325i from a local provider, and alas my mate found 2nd whilst looking for 4th on his second lap of the day. The shape of that valve is very familiar - that following December, my mate received a Christmas card here in Australia from the car owner, with two very similar looking valves enclosed, cleaned and polished! An expensive souvenir but he can laugh about it now.

[@user-od9iz9cv1w]

Looks like a Japanese motorcycle engine. I think it's interesting that we are seeing 3 cylinder engines in the Yaris, Mini Coopers and BMW I8. I guess it is a cost saving over 4 cylinder?

[@Martin52863]

It’s a 3 cylinder like a Triumph so more like a Thai motorcycle engine😉

[@sang3Eta]

EU Emissions standards. They're taxing ICE sales over 99g/km now and giving that money via carbon credits to Elon Musk. Ignoring the fact that something like an VW ID.3 is 119g/km before you even put any electricity in it!

[@ApfelmannYT]

@@sang3Eta Thats obv a lie, but pls explain

[@micsub]

@@Martin52863 A Tryota engine...

[@micsub]

@@sang3Eta Well said man, even though I'm not sure about the Elon Musk part. However, you're absolutely absolutely right about the CO2 tax. In France to buy a Yaris GR-4, it's 6039 € CO2 tax (in 2021 - 7600 € in 2022) to add to the price tag. Won't see many GR-4's registered in France for sure. Many people that buy EV are not aware that the equivalent CO2 "weight" the construction of an EV and it's battery has before even starting to drive... They are so sure in helping the save the planet from us bad petrol head polluters...