New 2020 GT350 HEP engine failure

[sox3]

Is the secondary timing chain missing?

looks to me like its in front of the cam cover, broken

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[Stage_3]

Man, that sucks OP. Sorry to read.
Good luck going forward and keep us posted!

 

[Rubyred17]

looks to me like its in front of the cam cover, broken

Hi

looks to me like its in front of the cam cover, broken

you can see the chain on the radiator cover along with a richer arm ...ouch

 

[olaosunt]

Do you what would cause a valve to drop?

No idea . May be one the resident engine experts can chime in ?
paging @bauern or @AceOne !

 

[RPDBlueMoon]

No idea . May be one the resident engine experts can chime in ?
paging @bauern or @AceOne !

You aren't the resident expert? Lol sure had me fooled

When I did a Google search the most common causes are the timing chain or the valve spring breaking.

 

[olaosunt]

You aren't the resident expert? Lol sure had me fooled

When I did a Google search the most common causes are the timing chain or the valve spring breaking.

LOL , i am only an expert at blowing up shit !

 

[stanglife]

Ok. What would you hardly refer to it as then ? The bottom line is that it's no longer being made. I'm sure there are several reasons for that, I was just wondering aloud what those were. I don't own one, so I have no beef ...

To say they "killed it off" was suggesting they had to stop making it for some other reason other than the life of the car they said was the only car that would get it had run it's course. I call it normal.

 

[stanglife]

Some Ford apologists here have a habit of ad hominem attacks instead of rational reasoning. They are armchair psychologists who want to analyze your mood and judge your motives. We should simply ignore them.

You're accusing others of non rational reasoning? If refusing to making shit up is not rational....then I guess!

 

[Super-Genius]

To say they "killed it off" was suggesting they had to stop making it for some other reason other than the life of the car they said was the only car that would get it had run it's course. I call it normal.

I'm not sure what you just said ... but ok, sure

 

[stanglife]

Autopsy pics:

Perfectly normal for this to happen 24 days after you purchase your car brand new.

Some asked for the builder plate. Here it is. I'm not blaming the builder. It may as well be a faulty part.

Good pics - nice they have it covered up some and are letting you check it out.

@honeybadger Check out the missing followers - wonder if they popped those out or they came out? I've thought a few times that a seized cam could cause the chain to break...honestly, the chains are so strong, I'm surprised they aren't the one thing still together and everything else shredded. If the cam seizes, especially on those big intake valves - could pop those followers and break the chain/opg.
Cams seize from oil starvation, typically....debris in the oil system or getting galled(sp) early on from lack of initial oiling. Built an 01 Cobra motor where the heads had been sitting for a while and a cam seized in about 20 seconds...in that case, the cam sprocket on that cam broke. I wonder if they'd be willing to put a wrench on that intake cam to see if it can move at all.

 

[shogun32]

cam shafts have clearance so seizing is not really all that common. If they did in fact weld themselves to the journals that level of damage is very, very easy to see if you pop some of the cam caps. Surely a "helpful" technician could undo some "by accident". I agree Hi-vol chain is usually VERY strong stuff. If the cam stopped dead I would fully expect to see teeth sheared off the gears.

Is the entirety of the VCT range 'safe' for operation at all RPM ranges? Or are only certain combinations legal, such that illegal ones run a high risk of mechanical interference?

 

[mk1spyder]

Either the chains or the tensioners are the issue. HOPEFULLY it was just a part quality issue and maybe some day someone will make upgraded chains for these cars. Like on motorcycles there are a variety of chain upgrades, fundamentally these are the exact same. The stock chains are TINY in my opinion but what do I know.

Side note, my car they didn't take anything apart or even touch the top of the engine bay much, they just dropped the whole subframe out and slapped another engine in. I dropped it off on thanksgiving day (thurs) they had a new engine sitting next to the car the following Monday which is crazy because every other part in their catalog is on backorder lol.

 

[lenFeb]

The below are seven instances with similar failed engines symptoms for 2020 GT350 that I searched on this forum.
Say that these are not all reported, still I don't think there are "many" failures for this engine. Moreover, same people posting here also posting on FB which blow out this issue from proportion. That being said, I'll be very upset if my failed. Sorry OP for your trouble.

Update: two other instances, nine in total.

1. https://www.mustang6g.com/forums/threads/2020-shelby-gt350-engine-failure.133081/
2. https://www.mustang6g.com/forums/th...-booboo-engine-replacement-experience.137204/
3. https://www.mustang6g.com/forums/threads/another-2020-gt350-engine-failure.137780/
4. https://www.mustang6g.com/forums/threads/my-2020-gt-350-engine-blew-today.138273/#post-2840377
5. https://www.mustang6g.com/forums/threads/new-2020-gt350-hep-engine-failure.152495/
6. https://www.mustang6g.com/forums/threads/2020-shelby-gt350-engine-replacement-dropped-valve.152472/
7. https://www.mustang6g.com/forums/threads/help-on-new-engine-or-buyback.149426/
8. https://www.mustang6g.com/forums/threads/well-that-didnt-last-long-2020-gt350r-dead.151244/
9. https://www.mustang6g.com/forums/threads/2020-gt350-engine-seizure-at-206-miles.137708/

 

[shogun32]

The below are seven instances with similar failed engines symptoms for 2020 GT350 that I searched on this forum.

let's assume that all 7 are the entirety of the observation pool. Of the M6G membership let's say maybe 200 persons are 2020 GT350 owners. Is that fair?

That's a 3.5% failure rate. If Coyote3 were failing at just 0.35% (1/10 as frequent) and assuming 65% of M6g forum members drive GT we'd have 0.0035 * 30,000 = 105 threads about infant mortality Coyote3 "new" off the show room floor. But that includes all 2015-2020 cars so let's just arbitrarily divide by 6 to make it represent a single MY. That would be 17 cases among just forum members. Have there even been 5 such threads? Or even 20 threads if we look at all years 2015-current?

Hell the units of Coyote3 on F150 positively dwarf Mustang so you'd think there would be a huge cacophony of pissed off truck buyers swarming those forums.

Yes self-selection bias is a real thing but even if this napkin math is off it still suggests Ford has a serious problem with their Voodoo engines be it design, manufacturing, or QC that can't be papered over by "everyone has shitty engines".

 

[mk1spyder]

The below are seven instances with similar failed engines symptoms for 2020 GT350 that I searched on this forum.
Say that these are not all reported, still I don't think there are "many" failures for this engine. Moreover, same people posting here also posting on FB which blow out this issue from proportion. That being said, I'll be very upset if my failed. Sorry OP for your trouble.

1. https://www.mustang6g.com/forums/threads/2020-shelby-gt350-engine-failure.133081/
2. https://www.mustang6g.com/forums/th...-booboo-engine-replacement-experience.137204/
3. https://www.mustang6g.com/forums/threads/another-2020-gt350-engine-failure.137780/
4. https://www.mustang6g.com/forums/threads/my-2020-gt-350-engine-blew-today.138273/#post-2840377
5. https://www.mustang6g.com/forums/threads/new-2020-gt350-hep-engine-failure.152495/
6. https://www.mustang6g.com/forums/threads/2020-shelby-gt350-engine-replacement-dropped-valve.152472/
7. https://www.mustang6g.com/forums/threads/help-on-new-engine-or-buyback.149426/

Your search is missing some, mine for example. If you consider how many 2020 were made and that they are all the same root cause, and figure maybe 20-30% get on the forums and talk about it. Its a pretty widespread issue amongst the 2020 cars.

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