Hole found in Cylinder of 2021 2.3 Ecoboost

SLFilms Bronco
Dec 23, 2025

Rank IV

Dec 23, 2025

Hello Nation. Looking to see if we are alone or if others have had this experience.
Mechanically stock 2021 Non Sas 2.3 Ecoboost.

No rock crawling nor extreme angles, but lots of snow, such, mud, sand and ruts.
We had a motive power failure after 115k flawless Miles.
Ford dealer, Whom we have had excellent experiences, pulled the valve covers and had to dig into the actual engine block with a borescope.
They discovered a hole in the engine block of our 2.3 cylinder wall between cylinders 2 and 3.
Looking for any input or if anybody else has heard of this.
Supposedly we are not alone with this issue but it is spoken of quietly among the tech world.
Thanks for any input. Chatting possibilities with our dealer now

Specs:
- Stock
- Non - Sass
- Stock Height
- 2.3 Ecoboost
- Automatic
- No Engine Mods
- No Performance Tune
- OEM Dealer Oil change every 3.5K miles
- OEM Dealer Transmission and Transfer Case fluids changed early at 75k Miles
Deadbronco, Kenneth

454748

Dec 23, 2025

#1
Hole or crack?
Joined May 29, 2020 Member 546
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SLFilms Bronco, Eninty

STRESS FREE !!!

Dec 24, 2025

#2
While I can be of no help with the issues you speak of but...... check around and see if you can get your hands on a crate 3.0 eco from the BRaptor.... just saying.... that is unless you have extended warranty covering the current issues.
2023 Wildtrak, Iconic Silver, Hard top, ordered 10/5, built 12/13, delivered 1/18

Expelled From Polite Society

Dec 24, 2025

#3
I didn't care about a hole in the engine block of a 2.3 Bronco engine,
Because I didn't own a 2.3 Bronco engine....

Rank IV

Dec 24, 2025

#4
It would seem quite odd that if your engine had a manufacturing defect where the engine block was cast with a "hole" between cylinders 2 and 3 that a problem would surface after 4 years and 115,000 miles of use. And what was the symptom of the "motive power failure"? Did the engine break, as in a crankshaft bearing failure, camshaft failure, overheating event that warped the cylinderhead or engine block? Blown headgasket? Did the hole allow coolant to mix with the engine oil?

I think the dealership needs to provide more information.
No salt tram towers were harmed in the making of this post...
extra toasty

Rank IV

Dec 24, 2025

#5
It would seem quite odd that if your engine had a manufacturing defect where the engine block was cast with a "hole" between cylinders 2 and 3 that a problem would surface after 4 years and 115,000 miles of use. And what was the symptom of the "motive power failure"? Did the engine break, as in a crankshaft bearing failure, camshaft failure, overheating event that warped the cylinderhead or engine block? Blown headgasket? Did the hole allow coolant to mix with the engine oil?

I think the dealership needs to provide more information.

These engines look to be “ Time Bombs”💣


raqball, Eninty

Gladesmen

Dec 24, 2025

#6
If this is the case, I guess I will end up with two Fords with Cummins power plants. Now to find a 4bt 🤔
BN 1100, Desert Sand Everglades. Reservation 7/30/20. ordered 1/22/21, reordered 10/15/21 dropped tow and hard top, reordered 3/9/22 changed to Everglades. production date 9/7/22 rescheduled 9/14/22 completed 9/26/22, shipped 10/7/22, arrived 10/31/22, delivered 11/03/22
Eninty, Mikes2021Bronco

Rank IV

Dec 25, 2025

#7
These engines look to be “ Time Bombs”💣



Lawyers make everything sound so terrible. Lol.
No salt tram towers were harmed in the making of this post...
Jakob1972, extra toasty

Rank IV

Jan 05, 2026

#8
Hole or crack?

OEM Service at Dealer used a Borescope to confirm a hole

Rank IV

Jan 05, 2026

#9
I didn't care about a hole in the engine block of a 2.3 Bronco engine,
Because I didn't own a 2.3 Bronco engine....

This is exactly why you were expelled from polite society and likely sat alone at lunch through high school. That said, if you didn't care, why did you bother typing this? LOL
Umichigan, TK1215

Rank IV

Jan 05, 2026

#10
It would seem quite odd that if your engine had a manufacturing defect where the engine block was cast with a "hole" between cylinders 2 and 3 that a problem would surface after 4 years and 115,000 miles of use. And what was the symptom of the "motive power failure"? Did the engine break, as in a crankshaft bearing failure, camshaft failure, overheating event that warped the cylinderhead or engine block? Blown headgasket? Did the hole allow coolant to mix with the engine oil?

I think the dealership needs to provide more information.

No other valve, shaft, crank or other failure. Dealer OEM service has been stellar and on our side. The performed the borescope and are on record in agreement that it is an extraordinary failure and working with us with corporate. There seem to be others of not in the service underground.
Umichigan, TK1215

Rank IV

Jan 30, 2026

#11
Hole or crack?

Hole1769791132321.png
raqball

Rank I

Wed at 1:40 am

#12
Hello Nation. Looking to see if we are alone or if others have had this experience.
Mechanically stock 2021 Non Sas 2.3 Ecoboost.

No rock crawling nor extreme angles, but lots of snow, such, mud, sand and ruts.
We had a motive power failure after 115k flawless Miles.
Ford dealer, Whom we have had excellent experiences, pulled the valve covers and had to dig into the actual engine block with a borescope.
They discovered a hole in the engine block of our 2.3 cylinder wall between cylinders 2 and 3.
Looking for any input or if anybody else has heard of this.
Supposedly we are not alone with this issue but it is spoken of quietly among the tech world.
Thanks for any input. Chatting possibilities with our dealer now

Specs:
- Stock
- Non - Sass
- Stock Height
- 2.3 Ecoboost
- Automatic
- No Engine Mods
- No Performance Tune
- OEM Dealer Oil change every 3.5K miles
- OEM Dealer Transmission and Transfer Case fluids changed early at 75k Miles

mine has the same issue just -1/2 cylinder I did the bite scoping my self. Never used coolant or overheating wife drives so it’s dhfkdjdhdjdjd!!!!!!!!
SLFilms Bronco

Rank I

Wed at 1:41 am

#13
Does ford fix anything that’s a factory. Issue of warranty

Wherever you go, there you are!

Wed at 1:48 pm

#14
These engines look to be “ Time Bombs”💣



AI slop -vs- AI slop

*the below screenshot I am posting is AI slop.. Do NOT believe everything it says without doing legit and real research. I present it to show how ridiculous AI is in this Ai v Ai fight.

Screenshot 2026-08-05 at 08.39.37.png
AI slop aside, here is a non AI video comparing all Bronco engines using their factual service department records. Bronco engines start at the 8:05 ish mark



Based on their actual data here are the results:

  1. Best engine 3.0L
  2. 2nd best engine 2.3L
  3. 3rd best engine 2.7L

Do not take that video as a sole point of information. It's their opinion based on their data.

Can we please stop with all this AI generated nonsense? This constant 2.3L bashing and fear mongering is getting a bit out of hand..

I personally think all 3 engines are good. They all can and might have a variety of problems. Constantly bashing one engine via AI slop is not fair to readers of the forum who want accurate information..

My .02
onX Trail Guide & Tread Lightly Member
Gyoja, Laura
Moderator Staff member

Administrator

Wed at 2:11 pm

#15
AI slop

Can we please stop with all this AI generated nonsense?

Yes, @raqball is right; we're working on a forum rule about AI. While it can be a helpful tool, we do not want to share solely AI-generated information due to errors, biases it can produce, and the lack of substance it can bring to the table. Posts should rely on research with sources, personal knowledge, opinions, and expertise of real people, so we can best help each other.
2021 Oxford White 2-door non-Sas Mid package 2.7L/10-speed Badlands with MIC top
2021 Carbonized Gray 2-door Sas High package 2.7L/10-speed Badlands with MIC top
Keeping the Jeeps: stock '89 XJ, 3.5" lifted '00 XJ on 31s and '89 MJ
Jakob1972, Gyoja

Wherever you go, there you are!

Wed at 2:48 pm

#16
Yes, @raqball is right; we're working on a forum rule about AI. While it can be a helpful tool, we do not want to share solely AI-generated information due to errors, biases it can produce, and the lack of substance it can bring to the table. Posts should rely on research with sources, personal knowledge, opinions, and expertise of real people, so we can best help each other.

IMO, AI can be
useful but it can't be used as the end all.

The other day I was Googling a wind sound that was coming from my Bronco after my hot and cold charge pipe and larger intercooler
install.. I wanted to find forum posts and / or videos of someone who had done it and did a sound test after the install etc..

Google automatically put AI generated info into the search results. Even though I had said in my search query that I had tested for leaks and found none, The original auto AI response said that I had a leak.

Right next to this auto AI generated search result was a clickable button called AI Mode.


I clicked on AI mode and it now said that this would be normal because of the larger metal pipes along with removing the sound baffling that's in the stock pipes.

I assume Google used the same AI model for both the initial result and for the AI Mode generated result so why so
different? Same exact question, completely different answers..

Users come to the forum for real answers from real people or to get factual information and data. IMO, AI kills all of that.

Thanks for looking into the AI issue!
onX Trail Guide & Tread Lightly Member
Jakob1972

Rank IV

Wed at 3:24 pm

#17
mine has the same issue just -1/2 cylinder I did the bite scoping my self. Never used coolant or overheating wife drives so it’s dhfkdjdhdjdjd!!!!!!!!

Sent you DM with the autopsy
raqball

Rank IV

Wed at 3:54 pm

#18
Yes, @raqball is right; we're working on a forum rule about AI. While it can be a helpful tool, we do not want to share solely AI-generated information due to errors, biases it can produce, and the lack of substance it can bring to the table. Posts should rely on research with sources, personal knowledge, opinions, and expertise of real people, so we can best help each other.

Yes agree. Laura is our true 6G Driving OG of an admin. Cheers and much respect to You.
You are one of the finest and realest believers and practitioners in off road Social Media. The Corporation is blessed to have you. Folks, dont make an AI s#it mess In Laura's room

I started this thread. We are a dirt mountain Bronco 6G OG Survivor. Original had ordered a hard top that the dealer believes broke before it was shipped so we got suckered into swapping for a soft top, we love it, though

We have had a hell of a journey. My Dealer, Dealer Tech and Service and parts staff went to war on my behalf like a pack of ninjas. 100% OEM Service, Parts and Fluids. We were a poster child for early preventative service. Did the Transfer and Tranny service at 71 K ahead of schedule.

We got it resolved somewhat satisfactorily.
It is a known issue that should truthfully be a recall.

We are not alone but still love the 6g. We use every gear and aux switch regularly in the field. Not extreme rock crawling but 12 month / year in all conditions.

In four minutes, I can take the windows off and pop the top, and have a camera on a tripod and keep my feet dry. If it looks like it’s about to rain, the record for getting the Top Button for me is about four minutes and 45 seconds.
Less with two people.


It's not a Badlands nor a First Edition. It's a "now classic edition" Black Diamond that has absolutely everything we need.
Slop, Rinse, Repeat. It is more nimble than a pickup and allows us to take Pelican cases of gear into the field or snow without having to transfer to a Side by Side. It drives great, laughs at snow and mud and gets our s#it done with a swagger and smile.

I am everyday still pissed AF after having to fight for a solution to a massive manufacturing fail that disrespects not only the customer but also OEM dealer and service staff. We collectively should not have had to fight so hard to get a solution for a manufacturing defective hole in the engine block that Ford 100% absolutely knows about. There are a ton of warranty fixes happening. WE were penalized because we actually use it. This is a workhorse. it's not a toy for us. It just feels like it.


6g At work-2.jpg6g At work-3.jpgStoryLounge 6G at work-1.jpg6g At work-4.jpg6g At work-5.jpg
Jakob1972, Umichigan

I wandered and got lost, again.

Thu at 4:57 am

#19
These engines look to be “ Time Bombs”💣



At the risk of seeming argumentative, I believe the 2.7 has a worse reputation. On the contrary, the 2.3 ( having been a well established engine at Ford) is often noted as more reliable. It would be interesting to see the actual statistics as opposed to anecdotal opinions.
"No matter where you go, there you are."
IG: Buckaroo_Bronco
raqball

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