Crankshaft Main Bearings
- Prior to disassembly, ensure main bearing caps are marked for identification, for reassembly in their original positions.
- When using Plastigage method to check bearing clearances, torque main bearings to 29 ft. lbs. (40 N.m) for 1.3L; 33 ft. lbs. (45 N.m) for 1.5L and 48 ft. lbs. (66 N.m) for all others. Ensure oil film is wiped from surfaces to be checked.
- A code indicating cylinder block bore size for each main journal is stamped into cylinder block. See Fig 1 and Fig 2 . Crankshaft main journal sizes are coded, and stamped onto crankshaft. See Fig 3 . Use these codes to obtain correct replacement bearings.
- With crankshaft removed from engine, measure for bend, out-of-round and taper. If any measurement exceeds specifications in Crankshaft Wear Specifications table, replace crankshaft.
CRANKSHAFT WEAR SPECIFICATIONS
| Application | Standard In. (mm) | Service Limit In. (mm) |
|---|---|---|
| Runout | .0012 (.030) | .0024 (.060) |
| Taper | .0002 (.005) | .0004 (.010) |
| Out-of-Round | .0002 (.005) | .0004 (.010) |