Rod Bearings

Use Plastigage to check rod bearing clearance. If proper oil clearance cannot be obtained with standard bearings, try a combination of undersize bearings. DO NOT use any bearing combination other than listed. See UNDERSIZE MAIN & ROD BEARING COMBINATIONS table.
If use of bearing combinations does not bring clearance within specification, machine or replace crankshaft as necessary. Always replace bearings in pairs. Refer to, at the end of this article CRANKSHAFT MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.

UNDERSIZE MAIN & ROD BEARING COMBINATIONS ⁽¹⁾

Excess Clearance: In. (mm)

Use Upper Bearing: In. (mm)

Use Lower Bearing: In. (mm)

0.0-.0005 (.0-.013)

.001 (.025)

⁽²⁾

0.0005-0010 (.013-.025)

.001 (.025)

0.0010-.0015 (.025-.039)

.002 (.050)

.001 (.025)

0.0015-.0020 (.039-.050)

.002 (.050)

⁽¹⁾	DO NOT use any bearing combination other than listed. If use of bearing combinations does not bring clearance within specification, machine or replace crankshaft as necessary.

⁽²⁾	Use standard bearing.