How To Select A Connecting Rod Bearing
WARNING: This page is about a different variant/trim than selected.
When New Connecting Rod and Crankshaft are Used:
- Apply big end inside diameter grade stamped on connecting rod side face to the row in the "Connecting Rod Bearing Selection Table".
- Apply pin diameter grade stamped on crankshaft front side to the column in the "Connecting Rod Bearing Selection Table".
- Read the symbol at the cross point of selected row and column in the "Connecting Rod Bearing Selection Table".
- Apply the symbol obtained to connecting rod bearing grade table to select.
- A: Journal diameter
- B: Pin diameter
When Crankshaft and Connecting Rod are Reused:
- Measure dimensions of the big end inner diameter of connecting rod and outer diameter of crankshaft pin individually.
- Apply the dimension measured to the "Connecting Rod Bearing Selection Table" below.
Connecting Rod Bearing Selection Table
CONNECTING ROD BEARING GRADE TABLE
| Unit: mm (in) | |||||
|---|---|---|---|---|---|
| Grade number | 0 | 1 | 2 | 3 | 4 |
| Thickness | 1.496 - 1.493 (0.0589 - 0.0588) | 1.499 - 1.496 (0.0590 - 0.0589) | 1.502 - 1.499 (0.0591 - 0.0590) | 1.505 - 1.502 (0.0593 - 0.0591) | 1.508 - 1.505 (0.0594 - 0.0593) |
| Identification color | Black | Brown | Green | Yellow | Blue |
Undersize Bearing Usage Guide
- When the specified oil clearance is not obtained with standard size connecting rod bearing, use undersize (US) bearing.
- When using undersize bearing, measure the bearing inner diameter with bearing installed, and grind the crankshaft pin so that the oil clearance satisfies the standard.BEARING UNDERSIZE TABLE
Unit: mm (in) Size U.S. Thickness 0.25 (0.0098) 1.622 - 1.630 (0.0639 - 0.0642) CAUTION: In grinding the crankshaft pin to use undersize bearings, do not damage the fillet R (All crankshaft pins).