see this post, and this post, and this post
the "Hot Zone" was 21159 thru 21228
we believe the new valves started with 21266
(Friday NHTSA reported "October 2021")
when Ford replaced blown engines, many of the early replacements had build dates 21273 & 21274
Bottom Line: Looks like you got a...
Since this thread died over a year ago, there are many new reports at NHTSA and other places. Total now well above 90
NHTSA 2021 Engines
NHTSA 2022 Engines
Friday NHTSA updated their investigation
3 Investigations
for 2021 FORD BRONCO
FILTER INVESTIGATIONS BY AFFECTED COMPONENTS
All (3) ENGINE (3)
September 29, 2023 NHTSA ACTION NUMBER: EA23002OPEN INVESTIGATION
Loss of Motive Power
NHTSA Action Number: EA23002
Components ENGINE
Opened From...
Friday NHTSA updated their investigation
3 Investigations
for 2021 FORD BRONCO
FILTER INVESTIGATIONS BY AFFECTED COMPONENTS
All (3) ENGINE (3)
September 29, 2023 NHTSA ACTION NUMBER: EA23002OPEN INVESTIGATION
Loss of Motive Power
NHTSA Action Number: EA23002
Components ENGINE
Opened From...
Ford really needs to resolve their cam phaser problems with their V-engines. Nearly 20-years now. Ford V-engines of all sizes having too many of these quality/reliability failures
In recent years Ford's quality problems are well documented
. . and this link to WSJ article
But here in B6G there are lots more than one. You'll get a whole troupe of acolytes with their canned responses "All manufacturers have problems" etc
Unfortunately the data are in. Over past 5-years...