Crankshaft Main Bearing

Crankshaft bearing Specifications

Crankshaft bearing






Main Bearing Cap Torque and Sequence






Bearings and the caps, then tighten the bearing cap bolts to 74 N-m (7.5 kgf-m, 54 lbf-ft), and the bearing cap side bolts to 49 N-m (50 kgf-m, 36 lbf-ft) in the proper sequence.

Main Bearing-to-Journal Oil Clearance





If the plastigage measures too wide or too narrow, remove the crankshaft, and remove the upper half of the bearing. Install a new, complete bearing with the same color code, and recheck the clearance. Do not file, shim, or scrape the bearings or the caps to adjust clearance.

If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below the current one), and check again. If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start over.






Main Bearing Selection

Crankshaft Bore Code Location

Letters or bars have been stamped on the end of the engine block as a code for the size of each of the four main journal bores.

Use them, and the numbers stamped on the crankshaft (codes for main journal size), to choose the correct bearings. If the codes are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.










Main Journal Code Locations (Numbers or Bars)