Rod Bearings
- Note direction of connecting rod and cap before removal for reassembly reference. If bearings are to be reused, measure bearing oil clearance using Plastigage before removing pistons. Check rod side play. See CONNECTING RODS and CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS tables under ENGINE SPECIFICATIONS.
- Rod bearings are available in 3 standard sizes. Rod bearing size is indicated by a numerical identification mark, "1", "2" or "3", stamped on back side bearing shell and on connecting rod cap . Identification mark is used to determine bearing thickness. See STANDARD ROD BEARING SPECIFICATIONS table.
- Install piston and rod assembly. Check rod bearing clearance using Plastigage method. Tighten rod bolts in 2 steps to specification, then turn nut additional 90 degrees. If rod bearing clearance is excessive, measure crankpin journal diameter. If crankpin journal diameter is within specification, replace bearing with a standard bearing. If crankpin journal is less than minimum specification, a .0098" (.25mm) undersize bearing is available. Regrind crankshaft to fit undersize bearing if necessary.
STANDARD ROD BEARING SPECIFICATIONS
| Bearing Identification Mark | Bearing Thickness: In. (mm) |
|---|---|
| "1" | .0585-.0587 (1.486-1.490) |
| "2" | .0587-.0588 (1.490-1.494) |
| "3" | .0588-.0590 (1.494-1.498) |