In the last 90 days or so, I've asked about Casting # 3748770 that I and others have come across that do NOT have an "X58" cast into them; asked, I might add, without receiving any commentary at all.
You can imagine my surprise when I found, in the first column on page 51 of Driveline #193, an ad selling, in part, a cylinder head with casting #3731539 and a date of G307 AND an "X58" casting!
One of the perceived arguments about +/- "X58" is that this was included only in the first 60-90 days, to call out to engine plant people that this was a changed casting in some way, shape or form and that Flint wanted to know of any perceived/reported changes as soon as possbile.
It would seem possible with this "539" head that another reason for "X58" may be required........
You can imagine my surprise when I found, in the first column on page 51 of Driveline #193, an ad selling, in part, a cylinder head with casting #3731539 and a date of G307 AND an "X58" casting!
One of the perceived arguments about +/- "X58" is that this was included only in the first 60-90 days, to call out to engine plant people that this was a changed casting in some way, shape or form and that Flint wanted to know of any perceived/reported changes as soon as possbile.
It would seem possible with this "539" head that another reason for "X58" may be required........
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