Engine replacement TSB - misfire, CEL

[marksst]

https://ford.oemdtc.com/7822/custom...eplacement-2021-ford-explorer-lincoln-aviator

Certain 2021 Model Year Explorer/Aviator All-Wheel-Drive Vehicles Equipped with 3.0L Engines Engine Assembly Replacement

All of the affected vehicles, an oversized right-hand exhaust camshaft journal was installed in the engine assembly. This may result in a misfire and low compression condition. The check engine light will be illuminated

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[northof60expST]

LIke the RS all over again?! A 19 hour job! WoW!

 

[Cruising68]

I'd say that's a pretty good supplier screw up and even worse if Ford produces them.