The engine identification code is located in the VIN at the 8th digit. The VIN can be found on the instrument panel. See the Engine Identification chart for engine VIN codes.
The engine block is also stamped with a 5-digit engine date code on the front side of the block to indicate the day and time of manufacture. The 1st position is a code for hour. The 2nd-4th positions indicate the Julian date (month and day). The 5th position is a code for year.