We Blew Up The most powerful GR Corolla in the World.......

[@christophergeldien9907]

Hate to be that guy.. but “why the engine blew up” is probably 36lbs of boost on stock internals. That thing was dope dude, sorry for your loss, time to build back stronger.

[@remyche8768]

500hp isn't much for this engine. Maybe faulty part or build error. Plenty now in gr yaris with this power with the no upgraded pistons the corolla has.

[@christophergeldien9907]

@@remyche8768 it’s the 36lbs I’d worry about more than 500whp. That’s a lot for cast internals no matter what engine. But that’s pretty dope that lots are making 500whp.

[@remyche8768]

@christophergeldien9907 your probably right, but back in Nov 10, 2021 Motive video did a gr yaris build that got 472hp on 36psi of boost, only had its valve springs upgraded, with the motor left unopened and the internals untouched. Helping achieve the feat is a new exhaust, bigger turbo and intercooler, and a fuel system capable of delivering buckets of E85 from a custom surge tank setup. Then I'm pretty sure once they put cams in they got over 500hp with lower boost. And that would of been the non upgraded stock internals. Think possibly some over tighten a bolt, set the engine down to hard and bumped it in a right spot. Iv owed my gr yaris since they first came out and never seen a g16e-gts blow up like this. Iv only seen the miss shifts

[@jasondoulkeridis6202]

Roll back 4 years to the original release data for the GR Yaris and you’ll find one of the special things about the G16E GTS was that it had no valve seats.

[@NMTDevastator]

Dang that is tough. Thanks for pushing the limits though to keep progressing the platform!

[@NemtecRacing]

Come back stronger than ever

[@simplejoysmedia]

Lets just say, we appreciate y'all pushing the boundaries of this platform. It's a big ol bummer but I know y'all are gonna rebuild a beast. Side note, I don't think I've ever seen engine carnage quite like that 😂 Cheers y'all.

[@Speedcamel1222]

I hope you get the Corolla up and running quickly.. thanks for pushing the limits on it, it was amazing to watch

[@NemtecRacing]

Working on a quick turnaround

[@CG-yh6js]

Paying close attention to what works and what doesnt for my 2024 GRC. Thank you and keep modding it

[@Electronica27]

11:14 my best guess would definitely be rocker/valve related. Very common on both gr86 and GRY. These cars aren't built to be bouncing off redline. I don't plan on hitting redline until I get that rocker retainer kit installed.

[@nicrandazzo758]

Take it to the dealership. Should be covered under warranty. Its pretty close to stock 😅

[@Dr.Bojie-Chan]

While I have seen plenty of pistons shatter, that is the most complete shatter I have ever seen. I am surprised you guys did not explore the bolt you found in the girdle and the balance shaft weight. (unless the bolt was put there during disassembly). This is absolutely a shot in the dark but if the balance weight came off and struck the crank/rod, it may have created enough resonance to blow the piston up.

[@himmihyme2665]

the bolt looked untouched and the mounting surface on the weight seemed in tact. i would have questioned that a bit more too i think.

[@mpgcamo]

I think you guys need uprated Valve Locks and Rocker Retainers to help keep the valves captive. Lamspeed keep these in stock. I would also recommend the Oil Pan Baffles help to maintain oil pressure under high loads and lateral and downhill heavy braking Gs. 5w30 or even 5w40 should be recommended on these GR Yaris and GR Corollas because honestly apart from fuel economy 0w20 just can't adequately protect the engine under heavy load.

[@TheAnonomusGamers]

Definitely think it dropped a valve

[@NemtecRacing]

Definitely gonna go all out for oil mods in the new motor for sure

[@NemtecRacing]

I agree. After looking at it for a few days and looking at the ecu logs it seems to be the only reasonable conclusion

[@GRSuperSonicRed]

Honestly I thought they put those valve locks for the rockers. 😢😢😢This is sad. That was my first mod.

[@chitasao]

Came into the comments just to see if anyone else thought it might have been the loose rockers/lack of retainers that I saw in the Denstoj video a few months back: kzbin.info/www/bejne/jGWsdYx4oZp_l6c

[@andrewmerrick601]

Dang man, sad to hear but awesome to witness and learn from. Ya'll are awesome. Really hoping you guys get to hit the track this year! Either way, I'm here for the state of the art motion picture, nothing is more entertaining than learning about my own car lol

[@GRCorollas]

I want to see the GR at the time attack! Hopefully you guys find the best way out possible and thank you for pushing the limits 💪🏼 learning a lot of the G16 with you guys! Keep it up

[@MangoGRC]

damn that's rough! poor valvetrain, but thanks for documenting these things to raise awareness on the possible limitations of our cars. rocky road to the most badass GRC!

[@NemtecRacing]

Yeah looks like you need to be very very sure about who builds your head and definitely don’t skip out on better parts!

[@JK-tu1xx]

I'm going to go out on a limb and say that this was pre-detonation combined with previous heat cycle damage to the head and longer duration camshaft timing. The combination of factors is likely the culprit, it makes the most sense when considering the alternative possibilities. You can't really point a finger at one issue being the reason this happened.

[@Wind_slash0]

Didn't change the break in oil at 621 miles as stated in manuel

[@Haloruler64]

@@Wind_slash0 The manual doesn't state that you need to change the oil at 621 miles. It only states that the break-in process is 621 miles and not to beat on it. No oil change recommended, though I did mine anyway.

[@DavTune]

@@Haloruler64 621 miles lol we were doomed early on in that case

[@Haloruler64]

@@DavTune Bro the Porsche 718 demands 2000 miles of break-in! TWO THOUSAND! I dunno how they do it.

[@FeedYourGreed]

I’m really enjoying following this GR Corolla build, huge bummer that this happened. Really appreciate some of the technical analysis you and the team provide. Hope it comes back better than ever after you sort how you want to move forward with it!

[@RichValleyPicker]

great video! I am committed to leaving mine stock(Core with LSD's),but I love these videos of guys pushing these things!

[@hudsoncordero]

I guess it's a good thing that lamspeed sells blocks, heads and basically whatever else you'll need. I'm excited to see what 'all will do with the new motor.

[@robzilla609]

I think when you changed your oil you increased crankcase pressure and potential got blow by and compressed fuel and oil on the intake stroke. Than as piston 3 traveled to TDC it detonated your piston. That failure potentially put a mix of fuel and oil in the exhaust which cause the large flames. Thats my guess.

[@antd2733]

Does heaver weight oil increase pressure?

[@GhostlyVG]

Damn man, sorry to see this. Thanks for the documentation. Excited to see what's next.

[@NemtecRacing]

Soon we will get your reactions lol

[@user-ft6nr2ho9g]

Is it possible that cyl 3 ran lean? overheated and cracked the piston?

[@JamesDyer90]

The valve seats being MIA is odd for sure, im not sure if any other cars have failed in a similar way.

[@NemtecRacing]

seems like not having rocker retainers mixed with some iffy head work might have been the issue. But im just a guy trynna have fun lol not totally sure

[@Gr4yota]

Im going to be praying for team nemtec after seeing this video

[@someidiot9343]

Billet block to match billet trans?

[@NemtecRacing]

That would be sooo sick but idk if anyone makes it lol

[@timbattle3415]

Great opportunity for some future footage. I'm looking forward to it.

[@NemtecRacing]

We’ve got plans already in motion so it should t be too long!

[@miguelhughes9783]

If you don't mind me asking. How many miles beforeit blew?

[@Robiam85]

Looks like balance shaft went since it was directly under cylinder 3. Is there a balance shaft delete for these?

[@tatertotsandbattlebots]

Genuinely surprised the block survived as well as it did considering an entire piston grenaded itself down into the crankcase. Damn.

[@cpftank09]

Damn, this doing it for science thing gets expensive!! Great videos and I hope you get it going again to race it this year.

[@NemtecRacing]

Thanks for the support!!

[@spencervalentine3823]

What does insurance do in this situation

[@bash5552]

check the springs, prob not strong enough, valve float due to rpm/boost, piston smash valve closed, disrupt seat, seat turns when valve open, valve cant close, piston not forged, by by piston, tears

[@Gr4yota]

Any way to check the tune?

[@NemtecRacing]

So on the ecu logs I made the 3rd to 4th shift and 2 seconds after the piston exploded…. We’ve talked to 2 different tuning shops around the world and compared notes and didn’t seem like ours was too aggressive in terms of timing etc we actually had a pretty conservative setup…. I think the head had a malfunction

[@L3GACYxiNsTiiNcT]

For next time use of these 4 oils 1.Amsoil Signature Series 2. LiquiMoly 3.Pennzoil ULTRA PLATINUM 4. HPL Oil Royal purple is junk for high performance engines Also did you originally obide by the 2,500Mile Engine Break in period? Everything in the engine needs to properly seat before beated on which couldve caused the valve failure

[@DavTune]

I'm not sure the car even has 2500 miles on it quite yet

[@Wind_slash0]

All bandaids

[@Lairex_Rai]

That sucks, just now watch the video and damn the piston just Grenades in there. Didn't you have a anti lag tune at one point? But that's just crazy. I hope you find out what really happened. It's still a new platform and trial and error.

[@FarrPete]

Piston #3 has left the chat... 💥

[@ADT2525]

*Has left the planet!

[@Wind_slash0]

Existence*

[@alberttsai3659]

I love how you guys constantly break stuff purely for our entertainment and enjoyment!

[@begbis]

Seems like Royal Purple HPS 5w-30 has way too much calcium additive and that doesn't help with LSPI.

[@2seep]

How much hp?

[@NemtecRacing]

450whp

[@timprice8877]

I’m so happy I bought my Type R 😊 Making 450whp on a bone stock block for 2 years now without a single issue , keep those torque numbers low & she will last!

[@remyche8768]

@timprice8877 iv beat type r with that much power in my stock gr yaris, because he couldn't get traction

[@timprice8877]

@@remyche8768 Ugh 😩 The things I would do to have a Yaris GR shipped to the states! Would love to make FiestaST AWD with 2.0 ecoboost head, & 2.3 ecoboost block, That’s about the closest I’ll ever get here in the states 😂

[@SethWild]

Painful to watch, but you guys are killing it. Hopefully there's a little more unreleased footage after the sequential install?!

[@Andyol14]

Cmon man looking weldable for sure!

[@NemtecRacing]

100%

[@Wind_slash0]

Jb* go brrrr

[@ajpwr666]

I started to think that's not a coincident. All the G16 engines that failed were all Cylinder 3. By judging the head, the piston did smashed into the combustion chamber, the remaining 2 valves were pushed through the seat. I watched another Japanese video, that happened the same way, the guy said the piston disintegrated due to the coating technology that was used on the piston. Honestly, I think the G16 stock cannot handle anything over 400whp.

[@NemtecRacing]

I’d say 420ish is probably fine. Our final dyno numbers were like 458whp so drop it by almost 40hp you should be good. Our new sequential added so much strain because it was just constantly in boost….

[@NemtecRacing]

Do you know what video from Japan you watched that would be interesting to see

[@ajpwr666]

@@NemtecRacing I dunno where my respond went lol, here you go again. kzbin.info/www/bejne/eaqwY62VirOmp80 The guy mentioned something about the latest coating on the piston causing it not generating heat and also to dissipate heat.

[@Quickb3n]

I've seen a number of these blocks blowing completely untuned and running stock boost. I can absolutely see these being a depreciation bomb and almost un-buyable second hand once they start hitting high mileage.

[@richurro20]

Same. No wonder in the GR Corolla FB groups everyone seems to be selling theirs off and more and more are starting to go for MSRP at dealers.

[@boiipauly]

This will be a good discussion to compare how this happened vs the gry in europe making 700whp without blowing the motor.

[@ireallyreallyreallylikethisimg]

That's insane, I wonder how long it could be pushed to 500hp for 😮

[@boiipauly]

@@ireallyreallyreallylikethisimg i want to tune my grc to push 340-350whp but after seeing this I want to wait to see the proper precaution mods to do first after nemtec figures out what went wrong

[@Curious-f1b]

Its Australia, not Europe, and they ran 770whp with a shot of nitrous. They said it was stock bottom end and only changed cams and valve springs, and ofc huge turbo. A g35-something, they didnt specify. It didnt blow up even while making multiple live stream pulls. They said they're going to do some work with it and bring it to the drag strip soon, so really excited.

[@boiipauly]

@@Curious-f1b well Australia, my bad didn’t do my research. I’m just curious since its the same motor why nemtec had this issue and the gry didnt

[@Curious-f1b]

@vhofdimer6378 yea, same. It's really strange, and in Bahrain from ekanooracing, their fully built yaris has 600awhp. Multiple g16 engines are running 450+ now, and not many have blown up. Before you modify your own grc, you should ask for advice from lamspeed racing as they have done the most research and sell the most useful parts for the g16e engine.

[@Jeditilt]

IDK Wtf happened, I'm not a car tech like you all. but this is interesting AF! Can't wait for the upcoming episodes!

[@jhowe67]

I'd bet the valve snapped, and at the high RPM, just turned into a blender. If the piston failed first, the wrist pin would be deformed or broken. The Guys in Europ making 600 to the wheels in the yaris have all gone to Forged pistons and rods, But they are also changing the valves at that power level.

[@mark_845]

How much power did it have before it blew up

[@NemtecRacing]

450whp

[@PaintflowException]

IIRC I dont think thr pistons are forged... Thats unfortunate...

[@rs3tuber425]

Watch this video, it is from Savagegesse and they do a 1 year review of all the most common fails on the GR Corolla. One of the weakest points is the valve train, it fails on the top end and it takes down the rest of the engine. Another fail is the rear diff overheating, the engine overheating and the crank knock. Just watch it: kzbin.info/www/bejne/oH2zpXyvipKerNE

[@copperkeyracing6167]

This is terroble to hear. Completely doesn't seem like it was something you did wrong. Seems like the proper precautions and care were taken (correctly sized turbo with the factory pistons and rods). I've never heard of the seats dropping out. My initial thought was a misshift at one time fatigued a valve but didn't cause it to bend completely. Then, one day, the valve gave out from being a fatigued valve, aka very ever so slightly bent valve... but that would be an exhaust valve, not an intake valve, and that's not the case. And then we find out the seat dropped out, and that's not something that can be banged out and must be pushed from the back or pulled out... that's just unheard of. It's easy to just pass it off as a factory defect, and defects do happen, but that would be too easy and nearly impossible to be likely. This is just completely a mystery. Maybe the shop that ground them actually did something wrong. Maybe they heated them. Maybe they did actually remove them and replace them without your knowledge... I would say that is most likely the answer to the mystery. Next time, don't let anyone touch the head, and/or ask for a video of the work done on it. Regardless, good luck. Love your work, and always watching.

[@Nameless-ej7xd]

Thanks for the post Eared a subscription

[@NemtecRacing]

Thanks for the sub!

[@NigelsModellingBench]

This is crap.. sooo sorry guys. Didnt you say, when you had the head job that they fitted new seats? I wonder if they popped which is the sole cause of this issue?

[@Crazy8ts]

so the engine and trans blew?, $$$$$

[@mhk67091]

Pre detention is my thinking .. the look of that piston being completely shredded. Time to order a new short block!

[@PierreCox97]

The flame looked cool at first…then I realized that’s when it blew 😭

[@Dobermann.Kennel]

are you guys canadian?

[@NemtecRacing]

No USA

[@austinwolfe2373]

That is impressive! Absolutely kachowed that engine 😂💀

[@GeraldPUR]

So you gona buy a new motor? That crack looks unfixable. 😮

[@NemtecRacing]

yeah there will be a video on it next week

[@Mike_OMara]

Guessing your IDC’s was above 95%?

[@300zxdriver]

Are you going to buy a complete engine?

[@NemtecRacing]

No

[@300zxdriver]

@@NemtecRacing Can you buy a block?

[@Wind_slash0]

Yea from moms ce. Or swap and start over. Mom gets an overbuilt engine for dd at tame levels 😆

[@dogsterooni]

the cost to rebuild an engine

[@jeffreymitchell968]

Clearly it got very lean and melted a 1/3 of your motor. I would scrap it and buy a new engine there is no saving that engine. Check your logs I’m sure that cylinder was starved of fuel

[@Faces98A]

Maybe a rocker slipped out??

[@vallasjo8003]

Wow!

[@thatGRprick]

Well damn 😢

[@NemtecRacing]

It happens

[@januaryandonGRC]

holy RIP lil engine

[@seawarZz]

is piston alive ? :D

[@raymondfrank9202]

good one

[@josemeza5086]

😥😥😥 my heart broke 😢sorry guys..that what happened

[@CorkSportZach]

Damn JOHN!!!!!!!!! :(

[@NemtecRacing]

It’s happens lol…. Sequential was just too addicting

[@dogsterooni]

oh no

[@jeffreymitchell968]

Make sure you beef up the fuel system it’s the heart of the car. It’s obvious it was starved for fuel. Good luck with your build. I’ve seen a lot of people with damaged engines but your application is one of the worst failures I’ve ever seen.

[@daniellau4334]

I think Toyota is going to have big problems with this new designed engine. It’s starting out with big problems not small ones.

[@NemtecRacing]

This was 100% out fault lol. You can’t expect a stock motor to run 280 degree oil temp and get beat on day after day and never break

[@TylersNeighborhoodGarage]

Here's an alternative that will save 30k...buy clean 1970 Olds Cutlass, build 550 NA horsepower Olds 455, install drag radials, run 12.0's all day and spend all the extra time and money having fun. Just a thought.

[@wossbros1]

Good thing you got money apparently

[@man-e4g637]

Detonation

[@yoltsbp]

Ooooofff honestly glad I bought a new wrx. These motors holding 660w stock 💪

[@NemtecRacing]

Well power ain’t everything…. But I get your point

[@HenHavenEggs]

Yikes. So much for me telling my friends my cars block is bulletproof. Thr irony as I changed my profile photo tonight before watching this. Oops.... Ufo video tike rest of night.

[@HenHavenEggs]

Ill hang on hopes of hypereutectic piston failure. Kieth Black would be ashamed circa 1990.

[@braxtonwebster8421]

Warranty time

[@DannySarbs]

Yeah sure lol

[@Wind_slash0]

But this is normal driving conditions?? Ryan tuerck drives it like this all the time 🤔😂

[@khrizangel02001]

Should’ve went 0w40, the 5w as a start viscosity. Can be the culprit

[@johnshoemaker6684]

😢

[@NemtecRacing]

It happens lol. We will be back

[@leolldankology]

JB Weld

[@Alexi0]

NOOOOOO

[@grcorollace]

just put it on rice

[@BoostedRex]

Sale Sale Sale!!!

[@michaelfarrow25]

Rippp

[@carlosmoreno926]

What's next?

[@NemtecRacing]

New motor! More power lol

[@lilripsta911]

bad tune

[@NemtecRacing]

Interesting opinion

[@Joel-um2oi]

If it wasn’t valve float imma call it bad tune

[@kickithard]

Weak engine. This ain't no 2JZ.

[@iJakku]

If the 2jz was split in half into 3 cylinder. Its questionable that it'll be surviving this amount of power and boost either on stock block.