Connecting Rod Bearing: Testing and Inspection

CONNECTING ROD BEARING CLEARANCE

^ Tool Required:
- J 26900-2 Outside Micrometer, Or Equivalent

1. Install connecting rod bearing in connecting rod and connecting bearing cap.
2. Place a piece of plastic-type gaging material the full width of the connecting rod bearing (parallel to crankshaft), avoiding the oil passage hole.





3. Install the connecting rod bearing cap to the connecting rod with the arrow mark on the cap facing toward the crankshaft pulley.

CAUTION: Apply clean engine oil to the connecting rod bolts prior to installation and never turn the crankshaft with-the plastic-type gaging material installed.

^ Tighten the connecting rod bearing cap bolts to 35 Nm (26 ft. lbs.).





4. Remove the connecting rod bearing cap from the connecting rod and, using a scale on the plastic-type gaging material envelope, measure the connecting rod bearing clearance at the widest point of the plastic-type gaging material. Connecting rod bearing clearance specification: 0.020-0.050 mm (0.00080.0019 inch) with a limit of 0.080 mm (0.0031 inch). If connecting rod bearing clearance is greater than 0.080 mm (0.0031 inch) use a new standard size bearing and remeasure clearance. If clearance still cannot be brought into specification, the crankshaft must be ground to the undersize diameter specification and undersized bearing used in place of the standard size connecting rod bearing.
5. .Inspect the connecting rod bearings for signs of fusion, pitting, burn or flaking and observe contact pattern. Any connecting rod bearing found in defective condition must be replaced.





^ Two kinds of connecting rod bearings are available: Standard size and a 0.25 mm (0.0098 inch) undersize bearing. To distinguish them, the undersize bearing has the stamped number US025 on its backside. The standard size bearing has no stamped number.