Engine Codes - 6-232 & 6-258 Early: 1965-1972
Contributed By: Joe Schaefer
The six digit Engine Code is stamped on the pad at the right upper center of the block.
1st Digit - Year
2nd & 3rd Digit - Month
4th Digit - Type
5th & 6th Digit - Day
Note: Prior to 1969 the Engine Code information was stamped on a tag on the front left side of the Baffle above the Intake Manifold. The top portion of the tag showed the as purchased Part Number. The bottom of the tag shows 3 digits below the build date as follows:
1st Digit - Bore Size
2nd Digit - Main Bearing Size
3rd Digit - Connecting Rod Bearing Size
|IFSJA.org hosting provided by BJ's Full-Size Jeep Parts
©2000-2023 IFSJA Site Staff. Jeep® is a registered trademark.