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Discussion Starter · #1 ·
I have been searching every where online and have come up with nothing. So I figured I would ask for some help on here. I have a 2015 ecoboost, love the car! Took it in for a misfire and the dealership found damage to the 3rd cylinder, with only 40,000 miles on the car. They quoted me $7400 for an engine replacement, and of course the car isn't under warranty. A buddy of mine has a 2018 2.3L mustang engine with only 20,000 miles on it, and he told me that he would sell it to me for $2500. Will this 2018 engine work in my 2015?
 

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I have been searching every where online and have come up with nothing. So I figured I would ask for some help on here. I have a 2015 ecoboost, love the car! Took it in for a misfire and the dealership found damage to the 3rd cylinder, with only 40,000 miles on the car. They quoted me $7400 for an engine replacement, and of course the car isn't under warranty. A buddy of mine has a 2018 2.3L mustang engine with only 20,000 miles on it, and he told me that he would sell it to me for $2500. Will this 2018 engine work in my 2015?
Unless there are any major changes between the two engines I don't see why not. I think the newer 18+ engines got an overboost function to bump the torque to 350 ft/lbs.
 

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I have been searching every where online and have come up with nothing. So I figured I would ask for some help on here. I have a 2015 ecoboost, love the car! Took it in for a misfire and the dealership found damage to the 3rd cylinder, with only 40,000 miles on the car. They quoted me $7400 for an engine replacement, and of course the car isn't under warranty. A buddy of mine has a 2018 2.3L mustang engine with only 20,000 miles on it, and he told me that he would sell it to me for $2500. Will this 2018 engine work in my 2015?
Assuming engine is healthy id do it
 

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Discussion Starter · #6 ·
I was just curious due to the fact that online it groups the 2015-2017 2.3L together and 2018-2020 2.3L engines grouped separately. I didn't know if there was a major change or different electronic components. It's my gas saver, I just need it back on the road. I'm having to commute to work in my 04 lightning right now!
 

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If all fails, just buy another pcm from the same car as yours pay dealer $100 for a flash to your as built

small price to pay as last resort
 

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Can anyone definitively answer this question?

I have the same exact issue with my 2016 ecoboost.. misfire, damage cylinder 3, 30k miles completely stock except for intercooler.. I've been trying to find a 15-17 turnkey motor, they're all extremely high mileage, the only thing I could find that is reasonable is a 2018 2.3L.. I've searched all over the web, forums etc.. can't find an answer to this question.
 

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Something I have done in the past while swapping motors... has been to reuse everything from my existing motor when possible. Simply switch each item onto the donor motor, one by one. Especially when it comes to electronics, etc.
And pick up manuals for your Mustang and the donor when possible.
I just found an electrical manual for my 2018 on eBay for $30. I'm planning on building a motor this winter, and have many of same questions. Thanks for posting!!
And please keep us up to date on your progress!
 

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I'm not doing this swap myself, my car is at a shop to be worked on by an ASE certified mechanic. I ordered a salvaged 2017 2.3L ecoboost motor, I paid for it and was issued a receipt for a 2017 motor.

A couple days later they sent me the warranty/guarantee info along with the final invoice (already paid for) and on it they put 2018 2.3L ecoboost, I did not see this invoice until Sunday so I had to wait until Monday to reach out to the company. Now they seem to have shipped a 2018 2.3L ecoboost motor, they're not being helpful in trying to resolve the issue and instead keep telling me that it's "the right motor" and it will work with my car.. despite not being able to find any definitive info on this anywhere on the internet..

I'm currently still trying to get them to do the right thing and send me what I paid for or trying to figure out definitively if the 2018 is a direct swap for my 2016 Mustang.. I've spoken to a few mechanics that tell me it may not be and I shouldn't risk it but they keep assuring me that they called "a dealer" and spoke to a Ford Specialist that tells them it will work fine.
 

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There were no changes to the engine assembly of teh 2.3 ecoboost engine anywhere in the production of the car. A 2018 engine should work just fine with teh 2017 electronics and bolt ons. There is literally nothing different under the hood between a 17 car and an 18. Trust your mechanic. It'll be fine.
 
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I'm not doing this swap myself, my car is at a shop to be worked on by an ASE certified mechanic. I ordered a salvaged 2017 2.3L ecoboost motor, I paid for it and was issued a receipt for a 2017 motor.

A couple days later they sent me the warranty/guarantee info along with the final invoice (already paid for) and on it they put 2018 2.3L ecoboost, I did not see this invoice until Sunday so I had to wait until Monday to reach out to the company. Now they seem to have shipped a 2018 2.3L ecoboost motor, they're not being helpful in trying to resolve the issue and instead keep telling me that it's "the right motor" and it will work with my car.. despite not being able to find any definitive info on this anywhere on the internet..

I'm currently still trying to get them to do the right thing and send me what I paid for or trying to figure out definitively if the 2018 is a direct swap for my 2016 Mustang.. I've spoken to a few mechanics that tell me it may not be and I shouldn't risk it but they keep assuring me that they called "a dealer" and spoke to a Ford Specialist that tells them it will work fine.
As already mentioned. Same motor. Same bolt pattern same hookups. Block and heads are all the same. You are good to go.
 

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It should be the same however I would replace the broken parts rather than just entirely swap the engine. Wiring a new engine is a nightmare.
Good suggestion!!
Motors are repairable, did they tell you what type of damage has been done to cylinder #3? Big question, is the head salvageable??
 

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Cylinder 3 is the weak spot and the usual place of ecoboom which will require a swap if so.

The swap would be straightforward. These days the harnesses are easy mainly plug and play with the harnesses holding the connector in the general location of the sensor. Also the connectors are sensor specific except starter so no way to mix them up. These ecoboost mustangs have tremendous engine bay space so its easy to reach and plug things up.
 
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