Replacing all connecting rod bearings (B48 and B46 engine) (Cooper S and John Cooper Works)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2021 MINI Cooper, 2020 MINI Cooper, 2019 MINI Cooper, 2018 MINI Cooper, and 2017 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: There is no classification at the crank pins of the crankshaft in the modified procedure.
The top bearing shell (rod side) is supplied with lubricant varnish.
Extreme cleanliness has to be ensured in the bearing area and rod bearing screw connection area.
Connecting rod bolts must always be replaced.

Preliminary work needed:

Remove all PISTONS .

IMPORTANT: New connecting rods must be vacuum cleaned prior to installation.
Do not use compressed air to fuse off cracked areas.

Use a commercially available vacuum cleaner (2) to vacuum clean cracked areas (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Install new connecting rod bearing shells.

Insert connecting rod bearing shells (1 and 2).

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install all PISTONS .
Assemble engine