[Dhmanovic]

Hello everyone, someone from a Honda Accord Telegram group sent this photo of his engine.
The damage appears to be on the exhaust valve which is broken! This seems so strange to me given that Honda is known for its reliability!
Plus several other people have had problems with the spark plugs where they break or even melt!!
What do you guys think what is the cause for these problems. Could it be the fuel running lean/rich? Or Pre-Ignition? Give me your thoughts please!

 

[LARRY70GS]

Honda Accord 2023/2024 1.5T Major issue - Honda Accord Forum - Honda Accord Enthusiast Forums

General Tech Help - Honda Accord 2023/2024 1.5T Major issue - Hello everyone, someone from a Honda Accord Telegram group sent this photo of his engine. The damage appears to be on the exhaust valve which is broken! This seems so strange to me given that Honda is known for its reliability! Plus...

www.hondaaccordforum.com

I see you posted above as well. Posting that picture with zero context, and then stating a pervasive problem exists? You'll need to provide a lot more information. Broken valves, and spark plugs. Yes, severe detonation could certainly do that. More boost without supporting mods could do that. Insufficient octane fuel can also contribute to that.

 

[WMGwizard]

The speckling in the picture is indicative of detonation.

There are several potential causes for detonation including the engine running too lean. This could be from an injector failure or from unsupported modifications pushing more air without enriching the fuel system.

 

[Roadrunner00]

The valve is spotless which could be an indication of being cleaned by the fuel. No idea what would cause it without more info.

 

[Accord_Mike]

Spark plugs melting and breaking on the 1.5T? Never heard of that one. Why would they melt? Does the center of the valve cover get that hot? The turbo is not located in that area.

 

[LARRY70GS]

Extreme detonation can melt/break spark plugs, valves, ring lands etc. It also pounds the rod bearings. One more 1 post wonder designed to do what? A picture with no other information or context from a poster who hasn't followed up. Until I get more information, I consider this one more post whose only purpose is to bash the brand.

 

[Accord_Mike]

Extreme detonation can melt/break spark plugs, valves, ring lands etc. It also pounds the rod bearings. One more 1 post wonder designed to do what? A picture with no other information or context from a poster who hasn't followed up. Until I get more information, I consider this one more post whose only purpose is to bash the brand.

The problem is the ECU will help protect the engine in those conditions. Makes me think that cyl head pic was from a fast and furious Civic that was modded to hell and back. Or, someone experimenting with higher boost who didn’t have a clue about detonation and tuning safely. However, I’m pretty sure it wasn’t an 11th gen Accord. I don’t think there are too many people out there with 11th gen Accords turning up the boost on their 1.5T’s. If there are, they’re buying the Honda data or Ktuner off the shelf tunes which are relatively safe with the right supporting mods.

 

[LARRY70GS]

The problem is the ECU will help protect the engine in those conditions. Makes me think that cyl head pic was from a fast and furious Civic that was modded to hell and back. Or, someone experimenting with higher boost who didn’t have a clue about detonation and tuning safely. However, I’m pretty sure it wasn’t an 11th gen Accord. I don’t think there are too many people out there with 11th gen Accords turning up the boost on their 1.5T’s. If there are, they’re buying the Honda data or Ktuner off the shelf tunes which are relatively safe with the right supporting mods.

Agreed 100%

 

[The Hard Truth]

Glad for the handy " Ignore" option that is included with the $99.99 annual subscription for these jealous Toyota Employees.

 

[Dhmanovicc]

Extreme detonation can melt/break spark plugs, valves, ring lands etc. It also pounds the rod bearings. One more 1 post wonder designed to do what? A picture with no other information or context from a poster who hasn't followed up. Until I get more information, I consider this one more post whose only purpose is to bash the brand.

Sorry for not following up but the guy didn't give me any more information other than that he fixed it with his own money 3500 sar which is about 1000 dollars, he claimed for warranty but the dealer ship refused because he didnt do the maintanence, and trust me i have no benefit in bashing honda i just saw this problem and i didnt believe it at first until he showed me
Here is a couple of videos


Also he said that the dealer ship said its because of bad fuel but i dont know
btw i lost my first account thats why i came in a second account.

 

[Dhmanovicc]

Hello everyone, someone from a Honda Accord Telegram group sent this photo of his engine.
The damage appears to be on the exhaust valve which is broken! This seems so strange to me given that Honda is known for its reliability!
Plus several other people have had problems with the spark plugs where they break or even melt!!
What do you guys think what is the cause for these problems. Could it be the fuel running lean/rich? Or Pre-Ignition? Give me your thoughts please! View attachment 561391

Sorry for not following up but the guy didn't give me any more information other than that he fixed it with his own money 3500 sar which is about 1000 dollars, he claimed for warranty but the dealer ship refused because he didnt do the maintanence, and trust me i have no benefit in bashing honda i just saw this problem and i didnt believe it at first until he showed me
Here is a couple of videos


Also he said that the dealer ship said its because of bad fuel but i dont know
btw i lost my first account thats why i came in a second account.

 

[Dhmanovicc]

Sorry for not following up but the guy didn't give me any more information other than that he fixed it with his own money 3500 sar which is about 1000 dollars, he claimed for warranty but the dealer ship refused because he didnt do the maintanence, and trust me i have no benefit in bashing honda i just saw this problem and i didnt believe it at first until he showed me
Here is a couple of videos

Also he said that the dealer ship said its because of bad fuel but i dont know
btw i lost my first account thats why i came in a second account

 

[Dhmanovicc]

Glad for the handy " Ignore" option that is included with the $99.99 annual subscription for these jealous Toyota Employees.

Sorry for not following up but the guy didn't give me any more information other than that he fixed it with his own money 3500 sar which is about 1000 dollars, he claimed for warranty but the dealer ship refused because he didnt do the maintanence, and trust me i have no benefit in bashing honda i just saw this problem and i didnt believe it at first until he showed me
Here is a couple of videos

Also he said that the dealer ship said its because of bad fuel but i dont know
btw i lost my first account thats why i came in a second account

 

[LARRY70GS]

Sorry for not following up but the guy didn't give me any more information other than that he fixed it with his own money 3500 sar which is about 1000 dollars, he claimed for warranty but the dealer ship refused because he didnt do the maintanence, and trust me i have no benefit in bashing honda i just saw this problem and i didnt believe it at first until he showed me
Here is a couple of videos

Also he said that the dealer ship said its because of bad fuel but i dont know
btw i lost my first account thats why i came in a second account

I'm a little confused here. This is second hand information, it didn't actually happen to your car, correct? The dealer refused the warranty work because he didn't do the maintenance? Does that mean oil changes? Here in the States, the dealer cannot require you to use them for maintenance. You can do it yourself. That is the law here AFAIK.

Bad fuel will cause detonation, that is death especially for a turbocharged engine.

 

[Dhmanovicc]

I'm a little confused here. This is second hand information, it didn't actually happen to your car, correct? The dealer refused the warranty work because he didn't do the maintenance? Does that mean oil changes? Here in the States, the dealer cannot require you to use them for maintenance. You can do it yourself. That is the law here AFAIK.

Bad fuel will cause detonation, that is death especially for a turbocharged engine.

exactly, its not my car i just saw the guy complaining about his problem and wanted to share it here to find possible causes, here in saudi arabia dealerships are really bad they void your warranty for the absolute worst reasons, as if they are scamming you out of your warranty, as i said the dealership refused to fix the car and they said its because of bad fuel, he had put 91 octane fuel in the car, he didnt give me much info but he said the odometer is 15k kms and he is using hondas 0w20 oil, also he said that it couldnt be from bad fuel because he fuels up in good and known gas stations, he told me that one spark plugs head had been broken inside the cylinder and caused the exhaust valve to break, but thats weird what would cause a spark plug head to break in a brand new car? as i told you ive contacted this and he said thats all he knows, he also changed the head gasket and coolant after this.

 

[LARRY70GS]

exactly, its not my car i just saw the guy complaining about his problem and wanted to share it here to find possible causes, here in saudi arabia dealerships are really bad they void your warranty for the absolute worst reasons, as if they are scamming you out of your warranty, as i said the dealership refused to fix the car and they said its because of bad fuel, he had put 91 octane fuel in the car, he didnt give me much info but he said the odometer is 15k kms and he is using hondas 0w20 oil, also he said that it couldnt be from bad fuel because he fuels up in good and known gas stations, he told me that one spark plugs head had been broken inside the cylinder and caused the exhaust valve to break, but thats weird what would cause a spark plug head to break in a brand new car? as i told you ive contacted this and he said thats all he knows, he also changed the head gasket and coolant after this.

Yes, that is classic detonation. No engine will stand up to that for very long. It can break pistons, valves, spark plugs, and ring lands. If you are lucky, the head gasket acts as a safety valve, the weakest link. Causes include lean running cylinder, high engine temperatures, insufficient fuel octane, too much boost, and too much ignition timing. If you run the engine very long with the oil contaminated by coolant, it will destroy the bearings as well. If I had the 1.5 Turbo, I would run the highest octane fuel I could. Your octane numbers are not the same as in the states. Your 91 is Research octane. It's equivalent to our 87. Here in the states, we run the AKI (anti knock index). That is an average between the Research octane number, and the Motor octane number (R+M/2). I would imagine that it gets pretty hot in Saudi Arabia.

 

[Dhmanovicc]

Yes, that is classic detonation. No engine will stand up to that for very long. It can break pistons, valves, spark plugs, and ring lands. If you are lucky, the head gasket acts as a safety valve, the weakest link. Causes include lean running cylinder, high engine temperatures, insufficient fuel octane, too much boost, and too much ignition timing. If you run the engine very long with the oil contaminated by coolant, it will destroy the bearings as well. If I had the 1.5 Turbo, I would run the highest octane fuel I could. Your octane numbers are not the same as in the states. Your 91 is Research octane. It's equivalent to our 87. Here in the states, we run the AKI (anti knock index). That is an average between the Research octane number, and the Motor octane number (R+M/2). I would imagine that it gets pretty hot in Saudi Arabia.

exactly! i notice these kinds of problems come in summer where temperatures reach up to 60 celsius under sun light, so you would say its a mix between insufficient octane and high temperatures? ok what could people do to not have this problem other than to put RON 95 fuel?

 

[Dhmanovicc]

also after the temperatures dropped and winter came in i didnt see anybody having these problems, as opposed to summertime, ive seen a couple of people with the same issue.

 

[LARRY70GS]

also after the temperatures dropped and winter came in i didnt see anybody having these problems, as opposed to summertime, ive seen a couple of people with the same issue.

60 Celsius, that's 140* Fahrenheit. That is certainly going to elevate the coolant temperatures above what you would normally see. Elevated coolant temperatures can promote detonation. Add boost into the equation, and I would want to run the highest octane fuel I could. Your 95 RON is equivalent to our 91. 91 is the low end for our premium gasoline. 93 and even 94 is available here. The way a car is driven is relevant as well. Driving around at high boost a lot is going to up the risk. It's a small engine being pumped up by the turbocharger. Cylinder pressures will be higher than a normally aspirated engine. I'd be changing the oil more frequently and using premium fuel especially in the Summer.