GR Yaris & GR Corolla Engine Failures | Explanation & Prevention | Pre Ignition & Mega Knock

[@throttlebuddies0]

This video is an update to the previous Video i did on this topic. The video was removed to an unjustified copyright claim wich will hopefully be resolved in the next few days. if you want to see the old video (which has some misinfotmation though: kzbin.info/www/bejne/rKSXYWRtiJVml6c much love goes out to everyone who commented

[@Sekred]

I have had my GRY for nearly 4 years now. Must be ready to go bang at any minute now. I also have 40 years of mechanical experience. So Toyota have got the ring gaps wrong. Well they have not been around for long time as a company. Tiny R&D department. No motorsport experience either. I always thought the Oil Control ring controlled (see what I did there) leakage(of oil) pass the piston. Blow By is the term used referring to leakage of combustion gas past the piston and rings into the sump during the combustion/power stroke. Not the other way round. I don't thing I have heard a bigger load of unproven rubbish base on no facts or qualified failure analysis in all my life. I will add one more thing. Prove It.

[@sultanoftippoo3857]

@@Sekred 100% agree. Had my GRY for nearly three years and its always run like a Swiss watch. Anyone who has looked at this narrative instantly sees it’s a load of b*llocks (of the two GR corollas that somehow caught fire one of the owners bought another GRC two weeks later).

[@elky82]

The crankcase pressure should never be high enough for oil gasses etc. to be able to enter the combustion chamber through the gaps in the rings. The oil is coming from the PCV system which is sucked back into the engine and burned for emission purposes. Id recommend a catch can or air/oil separator to ensure there is no oil mixing with the combustion air which can cause this detonation issue.

[@yuyu-san]

So how can we tell if we have a Gen 1 engine or a Gen 2? Is there a specific VIN number or serial number to look for?

[@throttlebuddies0]

Well they solved the issues completely in the facelift engines and some in the later pre facelift, bit the tolerances still remained on the wide side on the later pre facelift ones so i would use the recommended oil at least and do regular changes that will go a long way

[@yuyu-san]

@@throttlebuddies0 By facelift you mean the new 2025 models right?

[@throttlebuddies0]

@@yuyu-san yeah the ones that just came out i knot that they have all the improvements of the "gen 2" engine. as far as which older ones have what improvements, i am not so sure about unfortunately.

[@1InfinityShade]

@throttlebuddies6356 There is only one part number listed for the piston rings across all US GRC generations. Normally, you would see a part number supersession after a change like that.

[@elky82]

@@1InfinityShade the part numbers will be the same as the rings gaps are ground for each individual engine to make them fit

[@mmc2k9999]

How do you identify second-generation engines?

[@throttlebuddies0]

all of the facelift models are Gen 2 engines.

[@andrewcarroll8265]

They don't have a hole in the block 😂

[@1InfinityShade]

​@throttlebuddies6356 Half way though the fist year of production, there were a few changes made, but I am unsure if the piston ring issue was addressed that early on. The engines are numbered. So, I'm curious if there is a way to track the where in the series these issues are most prominent. My car was built in July of 23. So, I am a little nervous. I'm not sure I want to go out and grab a 2025 just so I can rest easy.

[@mmc2k9999]

​@@1InfinityShade toyota needs to come out and do to GR Corolla what they are doing to Tundra trucks and LX SUVs and replace the motors.

[@khamid1]

This storm in a teacup still going about? Highly exaggerated fear mongering but hey, keep scaring people for clicks.

[@throttlebuddies0]

@@khamid1 well the danger certainly is there there is no way around it as said in the video the right oil can help massively and with the new engines toyota has solved these problems

[@khamid1]

@@throttlebuddies0 There is no substantive evidence for the failures presented anywhere. Everything that has been mentioned has no actual evidence outside of "trust me bro" and "this guy told me".

[@throttlebuddies0]

@@khamid1 no actually the ecus can detect pre ignition and will throw a code and therefore there is evidence that this is an issue If you were using knock monitoring while driving and that happened you would also clearly see it. There has been plenty of testing showing that that issue is pre ignition and its not just a "trust me bro" thing

[@khamid1]

@@throttlebuddies0 You haven't shown anything. This is still trust me bro. Provide the data, prove it or keep spreading rumours for likes, views and clout.

[@throttlebuddies0]

@@khamid1 there hasnt been any data published to the public unfortunately but plenty of tuners have tested this and come to.a conclusion that this is the isue. And that also is the only logical explanation for the failures. Or what do you think are the causes? The issue consists and is a problem on all direct injected engines but on the g16 engine more so due to looser tolerances which has been confirmed by toyota and shops who have pulled down engines and measured the piston ring gap wich was too large, promoting oil entering the combustion chamber This is why you see some engines also randomly throwing rods while revving. You have to acknowledge there is a problem, otherwiese toyota wouldnt have done these revisions and there werent as much engine failure videos + not everybody does a video on this In the comments on my last video which unfortunately got copyright claimed by some idiot for no reason there were plenty of people in the comments who had actual engine failures on stock engines so dont tell me that there is not an issue.

[@andrewcarroll8265]

Im surprised toyota made such an oversight

[@throttlebuddies0]

@@andrewcarroll8265 all cars with direct injection have a problem qith pre ignition, but the pistons and tolerances toyota was using in their first generation were just causing problema

[@benbennit]

No oversight they know about these issues. You have a very high pressure, highly strung systems. There is also issues an issue with fuel vapor being pushed down past the piston. Toyota just need to get the car past it's warranty.

[@meganjay30]

I was wondering why i have't seen any on the road for a while now... I can't stand the look of them or a 3 cylinder engine.

[@throttlebuddies0]

I wouldnt say the majority have blown their engine but you just have to be careful for example when servicing what oil you put in as that can make a huge difference

[@meganjay30]

@@throttlebuddies0 still... not a good feeling since the amount the GR Yaris cost to buy........... Toyota will have to pay in the end.. For sure.

[@throttlebuddies0]

@@meganjay30 hopefully they will. In the us they are kinda iffy about it