Cylinder Block - Inspection (Cont'd): Connecting Rod Bearing Clearance / Piston Pin Clearance
EM-242spec tableConnecting rod bearing clearance standards differ between CD17 and CD20. Selective rod bearing grade table applies to CD20 only.
Inspection (Cont'd)
Connecting Rod Bearing Clearance (Cont'd)
- 4Measure outside diameter "Dp" of crankshaft pin journal.
- 5Calculate connecting rod bearing clearance. Connecting rod bearing clearance = C - Dp. Standard: CD17 0.024 - 0.066 mm (0.0009 - 0.0026 in); CD20 0.031 - 0.061 mm (0.0012 - 0.0024 in).
| Specification | Value |
|---|---|
| Connecting rod bearing clearance (CD17, Standard)0.0009 - 0.0026 in | 0.024 - 0.066mm |
| Connecting rod bearing clearance (CD20, Standard)0.0012 - 0.0024 in | 0.031 - 0.061mm |
Connecting rod bearing clearance (CD17, Standard)0.0009 - 0.0026 in
0.024 - 0.066mm
Connecting rod bearing clearance (CD20, Standard)0.0012 - 0.0024 in
0.031 - 0.061mm
If it exceeds the limit, replace the bearing.
If crankshaft pin journal is worn or shows any abnormality, regrind crank pin and use undersized bearings to maintain the specified oil clearance.
IMPORTANT
Refer to S.D.S. for regrinding diameter of crankshaft pin and available service parts.
When regrinding crankshaft pin, do not grind fillet-roll.
For CD20 (Selective connecting rod bearing)
If either bearings or crankshaft are being replaced with new ones, select connecting rod bearings according to the following table. Grade numbers are punched in either Arabic or Roman numerals.
CD20 Connecting Rod Bearing Grade Selection
0
Crankshaft pin journal grade number 00
Crankshaft pin journal grade number 11
Crankshaft pin journal grade number 22
Identification color: Grade 0: Black; Grade 1: Yellow; Grade 2: Blue.
CONNECTING ROD AND PISTON PIN CLEARANCE (Small end)
| Specification | Value |
|---|---|
| Clearance (D - d)0.0010 - 0.0017 in | 0.025 - 0.044mm |
Clearance (D - d)0.0010 - 0.0017 in
0.025 - 0.044mm
If clearance exceeds the specifications, replace the bearing.
See also
S.D.S.