3 Series E30 Z1 (M20) ROADST
11 11 Crankcase M20 B 25
Bore dia. a)
mm
84.00
+ 0.01
Intermediate bore dimension a)
mm
84.08
+ 0.01
1) Grinding dimension a)
mm
84.25
+ 0.01
2) Grinding dimension a)
mm
84.50
+ 0.01
Surface roughness a)
Rt (microns)
3 ... 4
Permitted roundness deviation of cylinder bore a)
mm
0.03
Permitted conicity of cylinder bore a)
mm
0.02
Permitted total wear clearance between piston and
cylinder (engine run in).
mm
0.12
a) New condition or rework
TD Crankcase, M20, B 25
BMW AG - TIS
03.02.2013 17:50
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 1 -