I purchased a 2011 F150 Super Crew Cab XLT with a 5.0 3 years ago. I didn’t realize the vehicle came with a crate engine it. In fact, someone helped me decode the label on the engine see below.

Bottom row of the decal:
E1521=Essex Engine Plant
190214= February 14, 2019
0367= Sequence (yours is engine #367 off the line)
This is straight from the 2014 FSM for the 5.0, Section 303-01C

I replaced AC and drive belt and for some reason the numbers that came off the existing belts were for a 2018 5.0 engine instead of the 2011 5.0 engine. Why would the belts be different? What else could I expect to be different when ordering parts? Is it a 2018 or a 2011 engine?

 

The belts probably came with the 2019 motor. It sounds like they replaced the 2011 engine with a 2019 one.

 

In your last thread, we decided the date code is DDMMYY, not YYMMDD.

https://www.f150forum.com/f38/decode...-label-504654/

So your engine wasn't Feb 14, 2019, it was Feb 19, 2014.

Indeed, if you reference the FSM section the original poster mentioned, you'll see it's DDMMYY:



The early Coyotes had a stretch-to-fit A/C compressor belt, later ones went to a more normal idler/tensioner setup. The drive belt routings look the same on the tensioner-style early Coyotes and the 2018, so I'm not sure what the part number difference would be, but there is a different belt spec'd for both the A/C compressor and other accessories between years.