Connecting Rod And Bearings - BMW N55 Manual

Connecting Rod and Bearings

The size of the connecting rod of the N55 engine is 144.35 mm. A new feature is the
specially formed hole in the small end of the connecting rod. This formed hole is
machined wider on the lower edges of the wrist pin bushing/bore. This design evenly
distributes the force acting on the wrist pin over the entire surface of the rod bushing and
reduces the load at the edges, as the piston is forced downward on the power stroke.
N55, small end of the connecting rod
Index
1
2
Explanation
Bushing
Connecting rod
19
N55 Engine