Re: Question on my 1937 Twelve's Engine Number

Posted by 1508 On 2014/5/2 20:52:53

Since it's a small percentage of engines that have a "A" in their serial number, perhaps it's more along the lines of over sized rod or main bearings. As these engines were hand built, when Packard encountered a crank that was "slightly off" and had to be ground another .010 from the norm to make it work, the "A" in the engine number would alert them if a dealer or rebuilder ordered replacement bearings down the road.