Cylinder Block Design and Specification (Mercedes-Benz E-Class W123)

Height of cylinder block, mm

M 102

• nominal

292,45—292,55

• maximum

292,35

M 110

• nominal

213,1—213,2

• maximum

212,8

M 115

• nominal

242,8—-242,9

• maximum

242,5

M 123

• nominal

242,8—242,9

• maximum

242,5

Warping of mating surfaces of the block, mm

• top

0,03

• lower

0,04

Nominal ovality and conicity of cylinder mirrors, no more than, mm

• for models produced before 1980.

0,013

• for models produced after 1980.

0,007

Maximum permissible value in operation (when worn out)

0,05

Permissible non-linearity of the generatrix, mm

0,05

Surface roughness, µm

0,002—0,004

Honing marks grid

50° ±10°

Height from the piston bottom at top dead center to the mating plane with the cylinder head

• maximum

0,60—0,65

• minimal

0,60—0,65

M 102.920 (939)

• class 1

88,998—89,008

89,498—89,508

89,998—90,008

—

• class 2

89,008—89,018

89,508—89,518

90,008—90,018

—

• class 3

89,018—89,028

89,518—89,528

90,018—90,028

—

M 115.938

• class 1

87,000—87,022

87,500—87,522

88,000—88,022

88,500—88,522

• class 2

87,010—87,032

87,510—87,532

88,010—88,032

88,510—88,532

• class 3

87,020—87,042

87,520—87,542

88,020—88,042

88,520—88,542

M 102.980 (982)

• class 1

95,498—95,508

95,998—96,008

96,498—96,508

—

• class 2

95,508—95,518

96,008—96,018

96,508—96,518

—

• class 3

95,518—95,528

96,018—96,028

96,518—96,528

—

M 110.923 (984.988)

• class 1

86,000—86,022

86,500—86,522

87,000—87,022

—

• class 2

86,010—86,032

86,510—86,532

87,010—87,032

—

• class 3

86,020—86,042

86,520—86,542

87,020—87,042

—

M 115.954

• class 1

93,750—93,772

94,150—94,172

94,550—94,572

—

• class 2

93,760—93,782

94,160—94,182

94,560—94,582

—

• class 3

93,770—93,792

94,170—94,192

94,570—94,592

—

M 110.923 (984.988)

• class 1

86,000—86,022

86,500—86,522

87,000—87,022

—

• class 2

86,010—86,032

86,510—86,532

87,010—87,032

—

• class 3

86,020—86,042

86,520—86,542

87,020—87,042

—

74,50—74,52

62,500—62,519

74,50—74,52

67,00—67,02

67,00—67,02