Measure crankpin with an external micrometer in the thrust direction and at right angles to the thrust direction.
Install bearing shells and assemble conrods.
Using tightening angle indicator, BMW No. 11 2 500, tighten the big end bolts.
Tightening torque: Big end bolts oiled:
- Closing torque — 20 Nm
- Tightening angle — 80°
Measure big end bearing with internal gauge in thrust direction.
Enter measured values on record sheet and calculate big end bearing play. See Technical Data.