M52TU B25 And B28 Engines: Crankcase

The crankcase of the M52 TU engine is a new design. It is made from the same aluminum alloy as the crankcase for the Z3 Roadster 2.8 liter M52 engine.

• The aluminum crankcase is 51lbs lighter than the cast iron block of the M52.
• The engine has cast iron liners as the M52 engine in the Z3.
• There is the possibility for boring the cylinders once (+.25mm).
  Fig 1: Cut-Away View Of Crankcase

  Courtesy of BMW OF NORTH AMERICA, INC.