Checking the gap in the connecting rod bearings

Measurement

Fig. 2.230. Replacing some types

of bearings: 1 - connecting rod 2 connecting rod bearing inserts, and 3 - connecting rod bearing cap

Replace the cover connecting rod bearings (3) with the connecting rod bearing inserts (2) on connecting rod (Fig. 2.230).

NOTE Do not change the cover connecting rod bearings and connecting rod during installation, and ensure the purity of the contacting surfaces

NOTE The old bolts can be reused for testing.

Fig. 2.231. Points of measurement

of diameter connecting rod

Tighten the 2 bolts moment 13 Nm, then Dauvergne at +60 ° +15 °. The diameter of the connecting rod center is measured with an internal micrometer in positions I, II, and arithmetic. Formula and calculate the diameter of connecting rod bearing: I + II + III. I - 43, 026 mm. II - 43, 027 mm. III - 43, 031 mm. 129.084 mm: 3 = 43.028 mm. The average inner diameter of connecting rod bearings - 43.028 mm. Neck diameter shaft connecting rod bearing is measured by an external micrometer in positions I, and II. Formula and an example to calculate the diameter of the neck of the shaft connecting rod bearing: I + II / 2; I - 42,977 mm + II - 42,985 mm. 85.962 mm: 2 = 42.981 mm. The average diameter of the neck shaft connecting rod bearings - 42.981 mm. Identify the gap in the connecting rod bearings, using the average inner diameter of the connecting rod bearings, and the average diameter of the neck shaft connecting rod bearing. 257