Cylinder Bore and Connecting Rod Journal Code Locations

Rod Bearing Selection
Inspect each connecting rod for cracks and heat damage.

Connecting Rod Big End Bore Code Locations





Each rod has a tolerance range from 0 to 0.024 mm (0.0009 inch), in 0.006 mm (0.0002 inch) increments, depending on the size of its big end bore. It's then stamped with a number or bar (1, 2, 3 or 4/I, II, III, or IIII) indicating the range. You may find any combination of numbers and bars in any engine, (Half the number or bar is stamped on the bearing cap, the other half on the rod).
If you can't read the code because of an accumulation of oil and varnish, do not scrub it with a wire brush or scraper. Clean it only with solvent or detergent.

Connecting Rod Journal Code Location





The connecting rod journal codes are stamped on the crankshaft.





Use the big end bore codes and rod journal codes to select appropriate replacement bearings from the table.

NOTE:
Color code is on the edge of the bearing.
When using bearing halves of different colors, it does not matter which color is used in the top or bottom.