Broken Timing Chain 23 5.0

[Gen14]

2023 5.0 - Truck has 9K miles on it and coming up to a stoplight and the truck started shaking/ misfiring. Pulled over and the truck stalled out. It started back up with every light on the dash lit up. I limped it to the dealer just down the rode as it still ran. The codes were for misfire, 2 erratic timing sensor codes, erratic electrical fault cylinder 4 deactivation circuit.
The first call was to say the cylinder deactivation solenoid failed and they had the part to replace. 3 days later the Service advisor just called and said the timing chain was broken and they will be fixing it along with phasers, water pump, and whatever else they see. He said it doesn't look like a motor replacement. I asked about the valves or any other damage but they haven't gotten that far. I know there are 4 timing chains but not sure which one went. It looks like its a non interference engine so hopefully all is good. Sucks! I had a 2011 F150 5.0 with no issues ever, 2 eco's 18 & 21, and even a 5.4 Triton back in the day.

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[Gros Ventre]

There is no way a timing chain can break at 9k miles... unless there was a manufacturing defect. So good that Ford & your dealer is bellying up to the bar.

 

[slow3v]

No way it's a non-interference engine either, but that's interesting. I wonder what actually failed.

 

[MattV]

I would push the issue for a replacement engine.

 

[Gen14]

Yeah I agree I think something else caused it but not sure. Very strange it broke.
I've read people saying its non-interference and then interference. Maybe it depends on which chain broke?
I think there is more damage than they think.

 

[Blue22]

This is the first one I've heard of breaking so keep us posted. At the very least I would ask for an extended warranty.

 

[tbinmd]

Time to pull the oil filter and look for metal debris. Odd they said the timing chain broke, because you were able to still drive it. I would push for a new engine.

 

[Natetroknot]

I assume it was a secondary chain if you could still limp it along…..but then why the water pump replacement? I’m just an internet amateur that owns an eco boost but I hope your dealer tech is a good one and you get fixed up!

 

[boo radley]

There is no way that the timing chain broke if the truck still drove. The timing chain controls the pistons, electric for spark and valves for intake and exhaust.

While they are in there ask if they'll change the oil pump belt too. It's in the back of the engine so you have to pull the cab off to access it. I read on this site that they recommend replacing the oil pump belt at 100,000.

 

[fordtruckman2003]

There is no way that the timing chain broke if the truck still drove. The timing chain controls the pistons, electric for spark and valves for intake and exhaust.

It's possible for it to move if it was one side, but would run like crap. My 2011 3.5 snapped a camshaft and ran on half an engine. Destroyed one head on the highway. It would move, just not fast. Fun when everyone at dealer says they have never seen that in their careers. ?
No rebuild with that motor and still ran great when I bought my current truck.

 

[Gen14]

It's possible for it to move if it was one side, but would run like crap. My 2011 3.5 snapped a camshaft and ran on half an engine. Destroyed one head on the highway. It would move, just not fast. Fun when everyone at dealer says they have never seen that in their careers. ?
No rebuild with that motor and still ran great when I bought my current truck.

Yep I drove it 2-3 miles, it didn’t want to do it but it did. I had to accelerate slowly or it would shake and fall in its face. It was running on 4 cylinders and not smoothly.

 

[Murrk847]

Thats crazy. I would push for a new engine or the fattest of extended warranties. Also as a 5.0 owner youre the 1 in a million that it happens to.

 

[Gen14]

Thats crazy. I would push for a new engine or the fattest of extended warranties. Also as a 5.0 owner youre the 1 in a million that it happens to.

Yup, my son drives a 2011 5.0 with 175K on it.

 

[Gen14]

Got it back and its "fixed" They replaced the :
-deactivation solenoid (Passenger side) caused the issue
- Small timing chain passenger side
- tensioners /belts
-VCT's
- oil level indicator / tube assembly
- tons of different bolts/ gaskets
- Inspected cams, rockers, inspected oil and changed.
Glad its leased it as I wont be buying this one. Also a 23 5.0 came in the same day I was picking it up with the same error codes on a flatbed...

Truck us running fine.

 

[JExpedition07]

More likely your chain snapped and sent the ECM into a frenzy, and at that point the ECM could not control the cylinder deactivation system because those rockers aren’t being actuated by the camshaft with a broken chain. The solenoid is commanding an actuation that is not occurring as expected because the camshaft is not hitting the lobes. The solenoid is then blamed by the ECU as its job cannot be done. Then the fault code likely went off. There is just no cause/effect between this CD and a broken chain that I can find referencing the systems interactions. These technicians don’t seem to understand the cause/effect analysis in why these codes were stored, they have it totally backwards. CD is always made out to be a boogeyman, it did not cause this. A faulty CD system can cause misfires and wipe cams, what it can not do is bust a timing chain. I’d venture to say your solenoid was 100% perfectly fine.

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