Main Bearing Selection
Crankshaft Bore Code Location
- Numbers or letters or bars have been stamped on the end of the block as a code for the size of each of the five main journal bores. Write down the crank bore codes.
If you can't read the codes because of accumulated dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.
Main Journal Code Location
- The main journal codes are stamped on the crankshaft.
