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I am having this issue right now with my 2.3 liter ecoboost. Several misfire codes, coolant loss and white smoke. My warranty just ran out 2,000 miles ago so I took it to a mechanic $2400 later he tells me that it's a flaw in the open deck cooling design. In between each cylinder they make a slit for coolant to circulate and this is where the gasket failed. The Mechanic told me that it will just fail again and that the entire block needed to be changed. Ford changed this design for 2020 amd above due to this flaw. There are several lawsuits and tons of data out there about this known issue. Today I brought ot back to Ford and it looks like they have extended the warranty on these blocks because of this is so hopefully I'll get a new but I've had to eat the other $2400 spent on the head hasket.
I don't agree with your mechanic 100% But if Ford is willing to extend your warranty, I would gladly eat $2400! It's a lot less than what you could be paying!
 
How many miles do these engines have before failure and how hard are they being driven?
I have 2019 PP with Ford Tune I got the tune somewhere around 5k and the typical blot on’s. Granted my eco only has 23k because it’s not a daily driver. I do lean on it but I don’t beat it either. Haven’t had any problems.
One thing that does come to mind there were early reports of eco’s having spark plugs not gaped correctly from the factory. From what I understand direct injected engines do not like detonation and don’t handle it well perhaps with a misfire it is warping the cylinder head just enough to cause coolant leak and if that happens the problem will compound itself quickly. Keep in mind this is my possible speculation. Also if you had a tune up and the spark plugs were changed I’d check the spark plug gap to make sure it’s correct.
I would definitely check the head and the deck on the block to make sure they are flat. If the head is slightly warped and not checked your going to be having the same problem or if there was a problem with deck on the block. Again I’m just speculating possible causes.
 
How many miles do these engines have before failure and how hard are they being driven?
I have an October 2014 engine with 53k, Original owner and I don't baby it. I haven't had any head gasket, or engine issues other than a Turbo wastegate failure that was replaced under the extended warranty.

I would suggest the CFM valve cover breather to help vent pressure to atmosphere instead of blowing head gaskets, leaking timing covers, etc.
 
How many miles do these engines have before failure and how hard are they being driven?
The Ecoboost engines aren't perfect and they may have some design flaws, but they don't have any more issues then any other all aluminum, direct injected, turbocharged, gasoline motors that meet todays required manufacturing standards.
 
I am having this issue right now with my 2.3 liter ecoboost. Several misfire codes, coolant loss and white smoke. My warranty just ran out 2,000 miles ago so I took it to a mechanic $2400 later he tells me that it's a flaw in the open deck cooling design. In between each cylinder they make a slit for coolant to circulate and this is where the gasket failed. The Mechanic told me that it will just fail again and that the entire block needed to be changed. Ford changed this design for 2020 amd above due to this flaw. There are several lawsuits and tons of data out there about this known issue. Today I brought ot back to Ford and it looks like they have extended the warranty on these blocks because of this is so hopefully I'll get a new but I've had to eat the other $2400 spent on the head hasket.
Have the same issue with my 2017 2.3 ecoboost. I'm trying to find out if the 2020 long block will fit in 2017 Mustang Ecoboost. Can't seem to get a straight answer from Ford. They only tell me what they have to match my vin #.
 
I am having this issue right now with my 2.3 liter ecoboost. Several misfire codes, coolant loss and white smoke. My warranty just ran out 2,000 miles ago so I took it to a mechanic $2400 later he tells me that it's a flaw in the open deck cooling design. In between each cylinder they make a slit for coolant to circulate and this is where the gasket failed. The Mechanic told me that it will just fail again and that the entire block needed to be changed. Ford changed this design for 2020 amd above due to this flaw. There are several lawsuits and tons of data out there about this known issue. Today I brought ot back to Ford and it looks like they have extended the warranty on these blocks because of this is so hopefully I'll get a new but I've had to eat the other $2400 spent on the head hasket.
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Have the same issue with my 2017 2.3l ecoboost. Trying to find out if a 2020 long block will fit in a 2017 Mustang Ecoboost. Ford only tells me what matches my Vin # so I'd be buying the same 2017 engine with the same design flaw. Anybody out there know if a 2020 will fit?
 
Have the same issue with my 2017 2.3 ecoboost. I'm trying to find out if the 2020 long block will fit in 2017 Mustang Ecoboost. Can't seem to get a straight answer from Ford. They only tell me what they have to match my vin #.
Do a search on the forum or internet there are several shops that build eco engines. They can probably point you in the right direction or build you a long block.
 
Looking for a crate engine if possible. Ford has a 2017 long block for $3700. I would like to go stock 2020 if it bolts right in. Otherwise I'll buy the 2017 and trade it in before it goes boom again.
 
Looking for a crate engine if possible. Ford has a 2017 long block for $3700. I would like to go stock 2020 if it bolts right in. Otherwise I'll buy the 2017 and trade it in before it goes boom again.
I've noticed a price difference between the 2020+ Mustang Ecoboost RWD savage motors and other 2020+ Ecoboost RWD savage motors. An example is this 2020+ RWD Explorer short block, listed on eBay for $800.
Will they interchange, I don't know. But, it's worth checking.
The head for this motor is also available for $400.
That would leave $2500 to have the motor assembled and timed by an Ecoboost Specialist, such as EMS (engineered motorsport solutions) with performance hardware.

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I've noticed a price difference between the 2020+ Mustang Ecoboost RWD savage motors and other 2020+ Ecoboost RWD savage motors. An example is this 2020+ RWD Explorer short block, listed on eBay for $800.
Will they interchange, I don't know. But, it's worth checking.
The head for this motor is also available for $400.
That would leave $2500 to have the motor assembled and timed by an Ecoboost Specialist, such as EMS (engineered motorsport solutions) with performance hardware.

View attachment 44017
Does this work for a 2018 ecoboost mustang?
 
If you are looking at new crate engines, why not put in a 5.0l ! Yes lots of moula but than you can forget about trying to amp up power with all sorts of tunes!

Just curious, I have read many posts on this forum about boosting hp with tunes. What happens with your manufacture warranty?
I am done with trying to boost power on engines. I have a 2015 579 PETERBILT truck with a m13 l which I had deleted and had power boosted to 500hp. Problem was the first delete was done poorly and I ended up spending another 4 grand on a second delete.
I am not sure if the first delete was done wrong but the head cracked on me. Once the head cracked the pieces of metal went thru the turbo and caused the turbo to go and more engine damage. Mechanic thought too high a tune caused more fuel dumped into the cylinder causing heat and thus cracking. Truck was puffing out thick white smoke. No warning signs of failure were detected.
Rebuild is $37 000 canadian
I know its a different engine. This was a Paccar, but the point is over tuning a small block engine is just asking for trouble. Only do it if you have deep pockets and know you will eventually have a ecoboom!

Get a 5.0 l
 
I'm going through the same issue with my 2019, 49K miles.
I've had warranty work done: plugs, coils, wires, head gasket, and all 4 injectors replaced.
Check engine light came on AGAIN for a cylinder one misfire.
Brought it back to them again and all they have done is changed the plugs 🤦‍♀️
I've pressured them for a compression test and I don't care who I have to yell at, they are putting a new (different year) motor in it when it's all said and done. This one has the stupid grooves between the cylinders and is causing head gaskets to blow left and right. I've dealt with this for a year now and I'm at my wits end.
 
I'm going through the same issue with my 2019, 49K miles.
I've had warranty work done: plugs, coils, wires, head gasket, and all 4 injectors replaced.
Check engine light came on AGAIN for a cylinder one misfire.
Brought it back to them again and all they have done is changed the plugs 🤦‍♀️
I've pressured them for a compression test and I don't care who I have to yell at, they are putting a new (different year) motor in it when it's all said and done. This one has the stupid grooves between the cylinders and is causing head gaskets to blow left and right. I've dealt with this for a year now and I'm at my wits end.
Mine too but at 22k miles. So pissed.
 
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