Checking the gap in the connecting rod bearings

The average inner diameter of connecting rod bearing: 4,028 mm. The average diameter of the neck shaft connecting rod bearing: 2,981 mm. Clearance in connecting rod bearings: 0,047 mm Calculated gap in connecting rod bearings is equal to 0,047 mm in this example. Allowable gap connecting rod bearing is from 0,013 mm to 0,061 mm.

NOTE The inquiry is made an instrument for measuring gaps in the bearings.

Fig. 2,232. Installation position covers types of bearings: 1 - cover

Check the loading position, connecting rod bearing caps (Fig. 2.232). Disconnect the connecting rod bearing inserts and connecting rod bearing cap by unscrewing 2 screws fastening. Measure the clearance in the connecting rod bearings, using the tool to measure clearances in bearings (plastic wire).

NOTE Tool for measuring gaps in the bearings is available for different ranges of measurements.

Cut the wire so that its length is consistent with the width of the connecting rod bearing.