This isn't a "rumor" This is the newsletter from the Lima Engine assembly plant acknowledging a valve issue...Yeah this is not the case. Several people who had their 2.7s replaced have already had the 2nd engine need replacement as well, right here on these forums.
There is no known “original bad valve batch.” That was a rumor/theory that has mostly been disproven (and certainly never been confirmed) now that failure distribution has occurred over a much wider range of build dates and engine build dates.
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