Spot on assessment. Blew the first head gasket at 12 months, and blew the replacement at 24 months on 19 si ethanol tuned. Then I used ARP head studs and cometic gasket and it's held for 31 months and counting. Car has had no other problems yet.

Thank you for sharing. My 2018 Honda Accord with just 59k miles had its head gasket blown. The car has never been modified and I don't drive it hard. Had the misfire took it took Honda and they told me Cyl 4 failing test and that I needed a new set of fuel injectors not covered by warranty and Honda motor Corp would not help with the $1,593 repair bill. While I was waiting for the parts to be delivered my check engine light came on. I looked at the coolant it was empty, the oil looked weird. The dealer misdiagnosed my problem, it was a blown headgasket. This was my first Honda and it will be my last. I am out of the powertrain warranty by two months. Honda should be a shamed of themselves. To error is human to not take responsibility for the design flaw is shameful. I am going back to Toyota for good. Will vote with my dollars. Goodbye Honda!

Here in Saskatchewan, i have rarely seen headgasket failures. We do have however extreme cases of the fuel/oil mixing problems. The super cold weather then the blistering hot summers, combined with 10k KM service intervals. Ususally in the super cold (-35° - -40°C) is when we see this. Doing an oil change on a hot 1.5l in the winter months is similar to being on Splash mountain. Lots of engines failing due to oil filters coming apart. (Similar to the excessive camshaft noise warranty extension.) Keep up the good work! Love the videos - always cool to see what other honda techs are experiencing!

2023 A-Spec Integra owner here. My car gets nothing but ethanol free 91 or 93 fuel, and regular oil changes. It runs great, but I'll definitely be keeping an eye out for any irregularities. It's currently stock and I only plan on adding a better intercooler/piping and intake. Increased service intervals should be the standard for any small displacement high power output engine. I come from the Fiat world where my tuned 1.4 was cramming out 200 hp (26-30lbs of boost). Oil dilution was an issue, but more frequent oil changes really helped. And that engine just loved to be abused. The big failure point on those was the Multi-Air Unit, usually from folks not changing the filter screen in the head and waiting too long to change the oil.

Thank you for the post . I been waiting for this video for a while . I been using premium since I got my CPO 1.5T Accord . I been getting more gas mileage going premium .

I love my 2.0L N/A civic. Not once have I regretted my choice over the 1.5t

I have an '18 SI which has 73k which is stock and I have been very happy with the performance and mileage with zero issues whatsoever. That being said, I would recommend buyers look at the 2.0 NA engine with a manual versus the 1.5T if your looking for long-term reliability.

very informative, in brief 1. design problem 2. weak head bolts 3. knock or detonation can cause issues

I have a 2023 Honda Civic Si. My L15CA has been getting 2000 mile oil changes from the dealership and is fed 92 octane from Chevron in WA. the vehicle has 6,700 something miles when I last glanced at the odometer. I am aware my car is still young but thanks to videos like yours, I am keeping on my toes. I do drive the car hard because despite the downfall of this CA engine. It brings a smile to my face and I came from a 2018 Honda Civic LX with the K20C2 and a 6 speed manual. That car also made me smile but the Si does a better job at it!

If my memory serves me right, the eco boost (ford) had a similar design and same head gasket failures, which they have now changed the manufacturing and instead have a small drilled hole instead of the groove. As to why Honda went this route is beyond me. They aren’t known to cut corners and as such would think they would spend the extra to negate head gasket failures.

I can’t believe Honda is having an engine concern. The company has been so thorough with their vehicles!🤷‍♂️ Thanks for answering my question on how to prevent!👍

Finally been waiting for this video Thanks 🙏

I love this guys channel and everything he is addressing is very logical and fact based. I just wonder if he's going to get fired someday for shining a light on the poor engineering of the 1.5t 🤔 Seems like they could've just used better head studs. WTH?

First! Finally see you! Mine 21 civic has 12K miles and I am going to put 93 octane from now. Turn on Eco mode to lower the boost. I think CRV and Accord have a much higher chance of getting Head gasket Leak!

Thank you for talking about in details about this issue.

We’ve seen this a few times also (San Antonio, TX) but not too often. Appreciate the input and actually makes a lot of sense. Will be curious to see if Honda comes out with a S.B. on them and how bad we’ll get plugged in the back side on the labor they’re willing to pay.

Ive been putting high octane for a while people said theres no benefits but im glad you give a legit one

Ford had the same issues with the 1.5 1.6 and 2.0 EcoBoost engines. Ford ended up with a new block design w/o these grooves also because of a much thicker material between the cylinders.

Get one of these every week it seems like. Agreed on the groove being a factor and how inconsistent the head bolts torque down. Good video. 👍

Thank you I think your assessment is spot on. I enjoyed your video and the information that you share with me. I will use it accordingly. Thank you again.

Always keeping it 💯...Keep up the great work 💪

Another great video. I myself and my best friend are unapologetically Honda Fan Boys as well.

2018 CRV...traded it in for my 2024 Hybrid....had 138,000 on it....a tech at the Dealership I traded it on bought it before it hit the floor. I used mid grade and changed my oil at 5,000, also had a catch can on it from 2019.....she is still going strong.

I have a ‘21 Accord Touring 2.0T with 21k miles on it currently. After watching one of your videos, I switched from using 87 octane to top tier 93 octane about 6 months ago. Not sure I can tell any seat of the pants difference but it sure does run well. I love the 2.0T engine. I wouldn’t own the 1.5T but I understand why many people do.

2 videos I’d like to see, the 07-11 crv frame rust recall and the 2.4 start up rattle. The differences between the newer GDI engines with bad chain tensioner and the older engines with bad VTC actuators. Thanks!

Just finished a head gasket job on my 19 accord. It had 101k miles on it. Hoping it’ll last at least another 60k

Excellent failure analysis , just one or two more twists . Head bolts factor is not because what it seems to be as you played it out . But rather these bolts reacting to the abnormal change in thermal loads due to the software updates while using the wrong fuel and or oil 😮that these engines got 2018 onward to mitigate the fuel /oil dilution . That dilution could also influence the cylinder pressure . One way to shed some light on this issue is to check the live data under various loads while using high octane fuel vs low octane in term of timing and fuel / air ratios . Once you see timing still being pulled back when using high octane fuel you will know that there are fuel oil dilution . So frequent oil change and use the proper oil Are the keys As and using the wrong oil will lead to more LSPI events which is the root cause of excessive cylinder pressure variations .

Recently had to replace head gasket on a 2017 Honda Civic sport w/ 138k. Purchased new, highway driven daily. Regular oil changes and did only run 87 octane fuel. Experienced vibrating and misfires on all cylinders, coolant was low. $3800 for dealer to replace head gasket and all new injectors. Very disappointed as I’ve had other vehicles with higher mileage and no issues. Going on about 8k miles since replacement. I’m hoping for a lot more miles out of this car. Good video as potential buyers need to be aware.

I’ve been a Honda guy all my life. This is telling me I need to consider becoming a Toyota guy.

I took a used 2021 Accord Touring 2.0L turbo home for a long weekend test drive this morning. Before I saw your video I had decided to purchase the car next Tuesday, primarily due to the much more supportive 12 way power driver's seat than the 12 way in my 2020 Accord EX 1.5L turbo. OOPZ. Also the electro magnetic shocks help both ride comfort and handling. Overall despite being white (meh) with a basic blACK interior (ugh) the car has impressed me very favorably after a long day of driving despite the drop in mpg: 31-32 in the 2.0 vs the 36+ I get with the 1.5. Both cars have a bit over 31K miles. My emphasis on the seat is due to a pinched nerve in my lower spine and a screwed up left hip replacement years ago. Both things leave me in pain-level varies-EVERY DAY 24/7. At any rate thanks for all the gr8 info on these cars and engines! :) DFO

Your Honda videos are excellent . We communicated last week on scan tools. I have purchased the launch Honda only version. Should arrive today. Now what year civics could be affected? I know my daughter just purchased I believe a 2022 civic. I’ll find out the model and inform her about the issue. Much appreciated. I’ve been a follower I believe sine your channel was created. I’m out here on Long Island. Thanks for sharing your Honda knowledge. Artie 👍

Finally! Someone besides me knows the importance of putting a higher octane on import cars. Kudos to you bro, keep up the good work! I myself is also a Honda tech and believe me when I tell you that almost everyone at my work doesn’t know the difference of gas octanes and what they do for import engines.👍👍

My wife has a 2020 CR-V 1.5T and we will absolutely start using Premium fuel all the time now. The last thing we need is a blown head gasket. I also regularly change the oil with full synthetic and plan on doing the 1st CVT fluid change at 30k miles.

such good knowledge. 175K and pretty sure the gasket has been leaking for 15k. It was low on coolant 6 months ago, 2 months ago it started misfiring. After replacing injectors and coils, it stopped for 3 weeks then did it again. Borescope in cylinder 2 showed the leak. New gasket next week.

Thank you for making these vids and making people aware. All manufacturers make mistakes, just the unfortunate reality of production. its all about how they make it right to the peiple that buy em. You hear anything about the j30AC in the type S?

Part of the reason I bought a '16 Accord was because I just knew Honda would be going turbo and ditching the trusty K24. They usually don't let common engine issues like this persist for too long, hopefully that's the case here because the L15 is gonna be around for a while.

Owned my 2018 Civic EXT for over five years (bought new). Currently at 163,700 miles averaging 36 mpg. No tune. No mods. All stock. I only use Shell Premium 93 Octane for the highest detergent (purportedly) to mitigate carbon deposits. I never drive hard. I rarely exceed 4k rpm. I rarely take short trips. I change the oil/filter every 4,000-4,500 miles. My goal is to get at least 300k miles without major repair to the engine, turbo, or transmission. Fingers crossed.

Interesting information sad to hear this long time Honda fan have owned 6 my newest is a 2010 in the market but concerned so many bad designs since 2012

Great video and very informative!

They had the same problem in 2.0 eco boost from ford, they changed it for the maverick and escape ect to a closed deck ,and it seemed like its solved the problem.

I have the 2023 Honda Accord EX (1.5T) and the owner's manual recommends 87+ octane or higher. I looked up the Acura Integra 1.5T and they recommend 91+ octane. Its the same engine! You're right premium fuel is the way to go.

2018 Honda Accord EX-L 1.5 73,300 miles (I'm from JERSEY TOO :D). Just came back from the dealer. Started with christmas tree lights (every warning light) going off in the car. Thought it was a bad battery, bought a battery wasn't that. Misfire on cylinder 3. Blown head gasket with a possible leak or deformed engine. They recommend buying a new engine at a cost of around $10,000.00. Went down an internet rabbit hole and it seems that the problem is quite major with thousands of posts all over the internet. The problem is believed to be making the engine more emissions-friendly to deal with government ratings; what they didn't foresee was the gaskets couldn't take the pressure. I contacted Honda GoodWill and seeing what they say, I'm not holding my breath. I've owned 1998 Honda Civic, 2009 Honda Civic, 2013 Honda Accord, 2016 Honda Accord, and 2018 Honda Accord...it's looking like this will be my families FINAL Honda.

Damn, I’m glad I stumbled onto you. Dammit that’s awesome! Not the problems are awesome. Just you’re awesome…lol

I bought mine new 2021. Been using 93 octane. I had a 3rd gen TL before. I do a 60 mile commute and average 40 mpg. I am 40,000 miles. Thank you for the advice.

Great video. I drive naturally aspirated Honda and Toyota V-6 cars. I have no worries. Love the 3.5L engine made by both companies.

Sticking with my 1.8l 94 ls integra. Best era for honda/toyota

Hopefully they would have resolved this issue in the new generation accords and civics , Hondas reputation could be on the line if these kind of issues persist. For example look at nissan they've been using the same crappy unreliable cvts for decades now and still haven't learned their lesson.

Ford had the same design coolant relief cut between the cylinders and was cracking the block. They had to redesign the coolant passage in the block and it fixed the coolant intrusion. Sounds like a redesign is in order!

Typical signs of a blown head gasket on any car not just Honda: Oil mixed with coolant, boiling coolant in the reservoir, milky colored oil, white thick smoke from tailpipe, constant coolant overfilled reservoir while radiator keeps getting empty. However, the best procedure to detect a blown head gasket is a block tester. I had a 1988 Honda Civic 1.5L . I replaced the gasket and problem solved. It is recommended to replace cylinder head bolts as they are called "stretch bolts..." How to prevent blown head gasket? Keep your coolant clean and perform a coolant service every 30,000 miles. After coolant service, make sure no air pockets are trapped in coolant system. Purge any air out of system using a spill free funnel. If not available, start engine and rev up to 2500 RPM until both coolant fans kick in while squeezing upper coolant hose, allowing bubbles to travel to the surface of the radiator opening .you will see the air bubbles popping out as you squeeze hose. Make sure your heating system is all the way to hot but not on as to allow coolant circulation through the heater core.

had cold start misfires, sputters, did head studs and so far so good! about 5 months after.

Love the 2.4 in my Honda Accord Sport Will Never get a turbocharged car. Oil Dilution and Head Gaskets prove me right again.

The word 'phenomenal' is reserved for Honda's J series engine. I personally own a 2003 Accord V6 equipped with the J30A4 engine, that is a phenomenal engine. Hopefully I can buy the 2008 Accord V6 (J35Z2) in the future. Anyway great video & explanation.

Thank you brother great info.

I have no problems so far and I'm at 130k but the best I can do at this point is fill it up with higher octane gas. A recall on these would be nice though! Thank you for the analysis.

Ford had the same issue with the 2.0 ecoboost with that same kind of groove. They removed that groove on the block no more head gs issues.

I’ve been working at a dealership 5 years. Up until about a year ago we saw few head gasket failures. Just the last month I’ve had 3. Still not many across the shop though. Apart from the head gaskets and regular bad injectors though, the 1.5 isn’t seeming super problematic.

I am having a accord 2018 54000km filled up with basic gas twice….. i felt drop in initial pickup and engine sound increased …. And after i decided that never to fill up with cheap gas always filled up with mid or 2nd grade …. Always felt happy … engine sound smooth… and obviously got a good average aswell and after watching this video feeling proud that i m unintentionally using a good fuel on my car not have any issues so far

Have they fixed the issue? Looking at the civic sport touring or the integra. Also if it cannot run correctly on the minimum octane(whatever the manufacture says) without having reliability issues, thst kind of ruins the epa numbers

I had a 1993 accord and for 10 years I had no problems just maintenance it was the perfect car back then I've been driving Honda since then NOW it's embarrassing having all these issues and they're not cheap to buy them that's why I lease them and return them cause all the problems they have 😊

Wow just now seeing this. I'm at 65K on my 2018 Accord 1.5T CVT. My coolant level is full, been that way since new. I do regular oil changes with full Pennzoil Ultra Platinum synthetic...but have been running 87 octane since new. I'll switch to 93oct today LOL. It's my daily driver, I don't drive it like a ragged drag racer.

I started running 93 octane at 30,000 miles in my 21 accord sport. I was running it a some of the time before that but when we had $6.00 a gallon fuel I stopped. I check the oil and coolant once a week. I put a piece of tape on the coolant reservoir to keep an eye on the coolant. Also I never drive like I stole it and drive it like an old lady. The 1.5t is a good running engine with lots of power when it’s not broken.

Heavier car, boosted tiny motor, results can be anticipated. Manufacturer evidently didn’t bother to clamp the head accordingly, didn’t beef up the supporting systems (cooling). Run!

Owned several Accords since 1996 including an 07 3.0Land 15 2.4L now. Your video has convinced me to avoid a new 1.5L Accord. Now I would only consider the 2.0L hybrid or buy a Camry. It seems clear Honda engineers have not figured out the 1.5T. Wonder if they ever will.

17 crv kept in meticulous condition using 91 octane . Head gasket at 50k. All the usual symptoms. Dealer said it was a bad radiator cap. Dealer bought the car back. We bought a Lexus. Problem solved.

The power train worries aside, my fiancé's 2023 civic hatch already has annoying issues (warped brake rotors, side window rattle, TPMS lights that don't turn off, a sticky e-brake switch, hatch strut failure, sun visor just fell off, and paint chips. My 2021 Corolla hatch se 6spd hasn't had any problems. I think the crew who built her car partied the night before. 😢

Ford had a similar problem with their 1.5L as well. A small redesign of the block to remove that groove solved the problem.

Good job, 80% of what we see are CRV's... Rough idle on cold start with no misfire DTC yet and low coolant reservoir are the indicators early on in our experience as well. Pressure test and a bore-scope and yup its leaking. Only seen one Accord and no Civics...... yet. We put new ones every time with warranty or customer, there is a spec to measure and reuse but they may be stretched a different lengths so new ones all the time.. Thanks for the heads up on aftermarket studs. Honda says they are failing and the fix is a new gasket, they sell thousands and the failure rate according to them in acceptable, I personally think they will come out with a check and re-torque like they did with the 1.6 back in the 90's, but by then its already leaking.

Hey man, another very informative vid. Have you considered the idea that the climate you live in may have a huge part in this specific problem being so prevalent? I work in south Texas and since working at Honda I haven’t seen a single problem with the heads on this motor. Could it be because people drive the cars super hard early in the morning before the car has fully warmed up? Lmk what you think

Considered buying a new SI but with this issue plus the mark ups I ended up getting a used ES 350 I ran across at the Lexus dealership one day. Haven't regretted my decision, its not as fun but its way more comfortable and will last forever.

I have a 19 coupe ex-t L15B7. I've owned since new, ONLY run 93 , fuel injector cleaner every oil change. Castrol 0w20 , Honda OEM filter. Change my oil every 3500 miles. I know...that's probably overkill with the oil, just an old habit. Never get in and just go during winter. Always let things warm up. Even if I'm only taking a short trip I let it get to temp. Atleast 2x a week I'm looking under the hood to make sure everything is good. I'm at 50,000 miles now, and have been doing this since brand new. I wish I had known about the L15's prior to buying the car. I would have , SHOULD have found a clean 8th or 9th gen SI and turbo'd that. I just fell in love with the design of the 10th gen coupes. Imo they just look badass , sleek, and modern. Although now it's becoming a bit dated, but that's ok. I plan on keeping my car forever either way. That's why I fluid film black the chassis every year, and keep the paint super clean and protected. I keep damp rid containers in the car. One in the trunk, and one in the main cabin. I also toss a few of those anti moisture packets in the spare tire area. Keep the engine bay clean, use all season mats so water doesn't soak into the carpets and rust out those areas. Hopefully I can find a winter beater for next year. Im torn between just the basic OTS tune from hondata, or just leave it alone. My plan is to head south anyway and find a rust free 1990-1993 Accord coupe, an eg hatch, or an ek hatch and have that be my project fun car. Leave my 19 as a DD and just keep it clean. Why do people say the B7 is better than the BA anyway? How different are the two?

2018 Honda Accord 1.5 owner here. Head gasket issues are real. First replacement 97k Second (currently) replacing at 165k I bought the vehicle with the intention of high mileage. It is in the shop for the replacement and will be asking about the aftermarket head studs. I drive normal, run 93 regularly. Hopefully these suggestions will help it last longer. I don’t want to go through a 3rd round!

I too am a Honda fan, just sold my s2k..had 2 of them. Also, I am a Porsche lover, so the head gasket story brings back a story about the very early Porsche 935, race car. 2.1 litre, very high boost making 850 hp and blowing head gaskets. The engine was staying together in 12 and 24 hr races but they had to fix the head gasket problem....so, until they could figure a better way out they actually welded the head to the engine case....expensive but winning* races was more important....

They’re blowing because people are boosting above 25psi. I’ve done it 3 times. This last time I replaced the head gasket and have turned the boost down to 18psi. I’ve been driving hard as hell since February and no blown gasket.

I worked at the dealer and rarely saw these engines with issues, unless someone was driving around with cooling system problems, usually because people put the incorrect coolant in, or run it dry. I have a 2017 and the car runs just reliable as the 2.0.

Do you think a turbo blanket and lightweight flywheel could help with any of this? Those are going to be my nexr mods along with a stage 1 clutch

I have a 2018 CRV and a 2020 Pilot. I am planning to sell the Pilot and keep the CRV but this issue with the gaskets (I just learned about it in this video) and the oil dilution issues on the 1.5L turbo have me worried. My question is, if honda is aware of all of these issues, why are they doubling down on installing the 1.5L on all CRVs and Civics? My understanding is that the LX trims still had the 2.0 L NA. Honda’s decision to expand use of the 1.5LT suggests that the failure rates are too low to be of concern to Honda or the failures are expected to occur long after the warranties are expired and at mileages so high that it would not appear to be unexpected. What do you think?

I would think the xj12 jag motor would have been a learning experience for the engineers but still manufactures are recreating the same issues.

Thanks for the video. How many of these have you seen since? Has Honda been covering any of the costs? We have a 2018 CR-V with the 1.5T. Would you get rid of a car like that?

It's the absence of a temperature gauge in models that come with the engine. All you get is a warning light that comes on when approaching overheating temperatures, by the time you have been warned it's usually too late and you get an overheat. The overheat damages the head gasket, or at the very least, a near overheat will weaken the gasket integrity. Easiest solution without installing a separate temp gauge is simply getting an aftermarket plug and play heads up display, they all have temperature readings straight from the car computer.

I'm keeping my 16 accord sport 6mt for a lot longer than i thought I would. They can keep the turbo cvts.

undersized turbo engines with direct inject are bad news- when honda built N/A 1.8 and larger engines they had great reliability

Same prob with the 2018 3cyl Ford Focus, and why I sold one I owned. They had the same grooves in the block and they were blowing gaskets just like this. Mine was consuming coolant at 50K mi.

Hello you got people putting foot down because it got turbo if you go steady .it go only a small engine thank for info bril ive learnt a lot thanks i just keep up with servceing😊😊

History repeating itself (rash of head gasket failures). Back in the 1980s (when aluminum heads with Iron blocks became common) there was another rash of head gaskets failures (Mopars, Mazdas, Cadillacs, Fords, VWs, diesels and more) but most people junked the cars since the typical life of cars was 100k miles, and to put an expensive repair on an 70k car was not worth it. (now the cause is turbos on little engines)

I know Honda made some internal changes to the 1.5 starting in Model year 23. Crank ,oil pan , turbo have been re worked. I can tell at least in the CRV- Smoother quieter more refined. Do you think the HG issue will still exist?

Ford Ecoboost having the same exact problem. The deck design is exactly the same with the notches between the cylinders . Wow.

Would you be able to provide similar analysis of the L15 in the 11th gen Si? great video, thank you!

The si is a manual. You tend to apply the accelerator more towards the higher revs. This seems to me more to do with people pushing it in eco mode in an automatic and just making heat. Premium gas would help, but if you know you always expect more, keep it in sport mode. Lately, car manufacturers have been trying to hit peak boost earlier. For instance, the mazda 2.5 turbo hit peak boost at 1200 rpm. But its not that bad because its in a bigger motor.

My mom had a '92 Civic, stick... got about 40-50 mi./gal, no joke. That thing always ran like a dream, nice clutch, with solid design principles, and solid materials, incredibly resilient. It's basically the type of product which had the BIG-3 on corporate welfare. I feel like Honda needs to step-back a little, take a breath, and revisit some tried-and-true, common-sense, design concepts. I've had problems with my pickup, very silly problems which shouldn't exist over decades of trial-and-error; we also had a Clarity which was... problematic, and got lower mileage than the '93 Civic. That's just silly. And it's not just Honda over-engineering themselves into a stock sell-off... the new Tundra... what a mess. Maybe it's just stupid consumerism... no one knows how, or cares to learn, to drive a stick anymore.

**BEWARE** I had my coolant flush/ oil change done just the other day on my 2.0T accord. First flush ever im just past 60k; anyways I checked my fluids the next morning once car sat overnight... The coolant turned clear( car never overheat or acted weird when I drove it the rest of the day after service)..... I took it back to dealership explained what happened, then they flushed it again; was told at this vist that they use a cleaner I think its that BG brand that alot of honda dealerships use; next day same thing.... I took it back 3rd time and told them based on my common sense and some baseline car knowledge, that I think alittle bit of the cleaner is being left behind after the flush, causing the coolant to kinda breakdown a lil hence why the blue color dye kept dissapearing in the fluid and that they should just run some honda coolant thru it and drain it then refill... Well here I am next morning my coolant stayed blue and all is good finally. SO the lesson here is check your radiator the next morning and verify the fluid is blue and is holding up after your dealer does a coolant flush, especially if they using a cleaning additive during the flush....

Great info

That is going to be a MAJOR issue with those engines, just like the Ford 1.5. That head surface area isn't enough to seal. Fix will be new short blocks, like Ford😉

I still have a slight interest in a ‘23 Accord EX. I have also read that the fuel injectors going bad prematurely is a problem, too. Do you think bad fuel injectors and blown head gaskets are pretty much a given to eventually happen in the 1.5t engine?

Mine is at Honda right. Now. For head gaskets. 2018 Accord 1.5T with 88k. Injectors were done at 50k, on the 4th battery, and door actuators replaced. Bought this car with 8K on it and well maintained. So much for the reliability I was expecting from my first Honda.

I appreciate your channel and thank you for answering my questions What gas should I use in my 2019 Accord?

How difficult is it to remove and install the studs alone? Not the whole install but just the removal and torquing down the new ones. Id like to do it myself in the future but am worried about snapping one.

The Ford tech mukaloco channel has a good explanation on the Ford turbos going from a closed deck in 2016 to open deck with the cross slots and now to a cross drilled design so the block gasket surface is continuous. Will Honda do the same 🤔

Wow this is the same problem that Ford has with their Ecoboost engines. I always run premium fuel in my Honda Odyssey even though it may not need it. I did try several times to switch and measured the fuel economy and found that premium in the Odyssey gave me better fuel efficiency.

These Honda open deck blocks look just like Ford Focus block that put a groove between cylinders for cooling. Makes even less surface for head gasket sealing. Modern cars have cheap race engine for sales pitch, they are scrap at when they fail. Most serious race engines use a close deck block that provides better cylinder support, more head gasket surface sealing, more block beef for stronger head bolt clamping. Open deck block is fast cheap production, good enough for consumer $40k cars.

Having driven and owned Honda's for over 30 years within my family, we always use premium fuel. Normal fuel always "felt off" and i guess this is hard evidence why it does on specific Honda engines. My current car is a 1.5T, so am happy to continue my family's habits!