Engine siezed?

[randotheking]

Wow. So embarrassing to have an engine rebuild at 5k miles. They say the coyotes are bullet proof.. Dont know about that anymore..glad you got it fixed..

Better now than later I suppose. The car sounds better than the day I bought it. My service adviser pleaded with me to not reinstall my catch can. He said Ford could have easily blamed the issue on it. He said he could understand if I were going to supercharge the car, but since I'm not I should leave it stock, which I intend on doing.


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[EFI]

Wow. So embarrassing to have an engine rebuild at 5k miles. They say the coyotes are bullet proof.. Dont know about that anymore..glad you got it fixed..

Now now cmon...one failure like this does not really change how well built the engine is for the others. Stuff happens...and guess what I've seen an engine built for 3000hp+ with billet block, forged pistons and billet 300m connecting rods get wrecked on its break in run (eg. no boost or hard driving). If that engine will fail, so will a run of the mill mass produced block for a basic car.

My guess is that the engine failed either because of an assembly error or a malfunction of something simple like an injector or coil. I doubt the connecting rod/piston broke from purely too much RPM or cylinder pressure in a stock engine.

 

[randotheking]

Now now cmon...one failure like this does not really change how well built the engine is for the others. Stuff happens...and guess what I've seen an engine built for 3000hp+ with billet block, forged pistons and billet 300m connecting rods get wrecked on its break in run (eg. no boost or hard driving). If that engine will fail, so will a run of the mill mass produced block for a basic car.

My guess is that the engine failed either because of an assembly error or a malfunction of something simple like an injector or coil. I doubt the connecting rod/piston broke from purely too much RPM or cylinder pressure in a stock engine.

Ironically my adviser had a oil pump gear sitting on his desk. I've seen a lot of issues with those on the GT350. Think that could have caused this?

He basically said the engine was so destroyed that they couldnt determine a cause. He has never seen a 5.0 destroyed this badly. Crazy considering I was probably at 2500 RPM when it broke

 

[wireeater]

Wow. So embarrassing to have an engine rebuild at 5k miles. They say the coyotes are bullet proof.. Dont know about that anymore..glad you got it fixed..

There are easily around 80,000 or more 15-17 GT's on the road throughout the world right now. That means to even have a 1% failure rate on engines, you'd have to have 800. I know you won't find that many online. Even though not everyone goes online to post about their failures I will still assume that Ford has not replaced 800 blocks since selling these cars there just no way. Find something better to worry about.

 

[randotheking]

There are easily around 80,000 or more 15-17 GT's on the road throughout the world right now. That means to even have a 1% failure rate on engines, you'd have to have 800. I know you won't find that many online. Even though not everyone goes online to post about their failures I will still assume that Ford has not replaced 800 blocks since selling these cars there just no way. Find something better to worry about.

There are quite a bit with #8 failures, I'm able to find dozens of threads on various forums going all the way back to 2011. Funny thing is there are guys that swear this can never happen unless you tune. Clearly not true

 

[EFI]

There are quite a bit with #8 failures, I'm able to find dozens of threads on various forums going all the way back to 2011. Funny thing is there are guys that swear this can never happen unless you tune. Clearly not true

Are all those #8 failures on 100% stock engines putting around at 2500rpm or are they modified and/or boosted engines being raced at the drag strip with shiftpoints at 7500+rpm?

 

[randotheking]

Are all those #8 failures on 100% stock engines putting around at 2500rpm or are they modified and/or boosted engines being raced at the drag strip with shiftpoints at 7500+rpm?

I've seen a mix of both. There's quite a bit of discussion regarding #8 not getting enough coolant. MMR makes a kit that will let you route coolant from #4 to #8 but you have to tap the block

 

[OrangeStang]

Now now cmon...one failure like this does not really change how well built the engine is for the others. Stuff happens...and guess what I've seen an engine built for 3000hp+ with billet block, forged pistons and billet 300m connecting rods get wrecked on its break in run (eg. no boost or hard driving). If that engine will fail, so will a run of the mill mass produced block for a basic car.

My guess is that the engine failed either because of an assembly error or a malfunction of something simple like an injector or coil. I doubt the connecting rod/piston broke from purely too much RPM or cylinder pressure in a stock engine.

All I said was I dont believe the Coyote motors are bullet proof and it sucks to see an engine go like that with 5k miles. Like it was stated above, there are a lot of threads out there dating back to 2011. From the BBQ tick to another tick. Strong motor nontheless but not bullet proof.

 

[wireeater]

There is no such thing as a bullet proof engine. All it takes is a manufacturing error of 100th of an inch to cause mayhem sometimes. Or the wrong part, the wrong fluid, etc. People use to refer the 2JZ as a bullet proof engine, I've had friends with plenty issues running 2JZ. I think that term is misunderstood. If you have hundreds of thousands of coyotes out there and not even 5% of them are failing under heavy loads, I would call that a pretty bullet proof engine. I think people just tend to over exaggerate what they mean, maybe not purposely but just by stating you have seen "dozens" of threads really means nothing. If we are factoring in 2011-Current, seeing 25,000 failed engines still wouldn't be considered an issue when it comes to manufacturing specifications. Don't forget, the Mustang isn't the only vehicle that has the 5.0 in it.

 

[Mustang_Lou]

The 2015 Coyote has been improved since 2011 so let's not forget about that.

 

[OrangeStang]

There is no such thing as a bullet proof engine. All it takes is a manufacturing error of 100th of an inch to cause mayhem sometimes. Or the wrong part, the wrong fluid, etc. People use to refer the 2JZ as a bullet proof engine, I've had friends with plenty issues running 2JZ. I think that term is misunderstood. If you have hundreds of thousands of coyotes out there and not even 5% of them are failing under heavy loads, I would call that a pretty bullet proof engine. I think people just tend to over exaggerate what they mean, maybe not purposely but just by stating you have seen "dozens" of threads really means nothing. If we are factoring in 2011-Current, seeing 25,000 failed engines still wouldn't be considered an issue when it comes to manufacturing specifications. Don't forget, the Mustang isn't the only vehicle that has the 5.0 in it.

Dozens of threads means nothing? Hmm. I bet 90% of the people dont even state their problem online they go straight to the dealer/shop for repairs. Add them to the dozens of threads as well. All I ever read was "Coyote is bullet proof" and thats why im saying hmmm I guess its not as bullet proof after all. I drive the same car as you. Im not talking smack about it. But I know what I read. From bbq ticks to other ticks on such a LOW mileage car is just unacceptable. Regardless how you want to take it.

 

[randotheking]

Dozens of threads means nothing? Hmm. I bet 90% of the people dont even state their problem online they go straight to the dealer/shop for repairs. Add them to the dozens of threads as well. All I ever read was "Coyote is bullet proof" and thats why im saying hmmm I guess its not as bullet proof after all. I drive the same car as you. Im not talking smack about it. But I know what I read. From bbq ticks to other ticks on such a LOW mileage car is just unacceptable. Regardless how you want to take it.

What's unacceptable to me is Ford ignoring the problem. I took my car into the dealership and they didn't even open the hood. They showed me 2 other 5.0s, started them up and said "hear that tick? it's normal, just like yours"

My new engine doesn't tick at all.

 

[OrangeStang]

What's unacceptable to me is Ford ignoring the problem. I took my car into the dealership and they didn't even open the hood. They showed me 2 other 5.0s, started them up and said "hear that tick? it's normal, just like yours"

My new engine doesn't tick at all.

Yeah I just hate when the dealer gives you the old fashioned "its normal" statement. Common sense would tell someone if one ticks and the other one doesnt then theres an issue with the ticker. Once again, happy you got your 5.0 back on the road!

 

[BOBS550]

I should note, my new engine is super quiet. No ticking what so ever. Drove great on the way home

Glad you got your Mustang back and running good We just got ours back and runs good (200 miles) no knock yet! They did a great job no dings or scratches on the car can not even tell the complete engine trans and k member was dropped out for engine swap but still not happy that at 1,900 miles #6 & 7 went bad no tune or racing:shrug:After 50 years of racing Mustangs this is the first one that has not been raced:doh: The family joke is the problem was it was babied:lol::lol:

 

[randotheking]

Noticed something today

There is a small stretch of highway near me with a decent grade. With my old motor it would lug at 65-70mph in 6th gear going up this hill, I often had to downshift to 5th.

With the new motor I'm able drive it without any issues and I still have the ability to give it more gas without downshifting

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