marka model piston sizes

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Below is data on piston parameters for modifications of cars of different years of manufacture.

Main piston parameters:

Piston parameters include more than 15 sizes, the main ones are as follows:

  • Diameter: nominal piston diameter;
  • Height: piston height;
  • Compression height;
  • Groove height: first and second ring groove height;
  • Oil control ring groove height;
  • Cylinder gap: acceptable gap between cylinder and piston ring;
  • Piston pin diameter;
  • Ring height.
Note:

When piston is worn out, the gap between skirt and cylinder, piston upper groove erasing, skirt scoring, cracks and deformation of partitions between rings may occur.

Important: item parameters and sizes of different manufacturers can slightly differ.

Piston - full drawing
General BMW 8er piston parameters
General view spravka
General view

Piston stroke min spravka
Piston stroke min

Minimum value of parameter Piston stroke for all marka model modifications.

Data is given in (mm).

Piston stroke max spravka
Piston stroke max

Maximum value of parameter Piston stroke for all marka model modifications.

Data is given in (mm).

Modifications spravka
Total number of all marka model modifications presented in our database

Dimensions piston

(General view)		67.6 (mm)82.7 (mm)9
marka model piston parameters
Parameter spravka
Piston parameter

Data is given for cars of various modifications and years of manufacture

Value spravka
Piston value

Data is given for cars of various modifications and years of manufacture
E31 830i 3.0 MT (1992)
Piston stroke67.6 (mm)
Compression ratio10.5
E31 840i 4.0 AT (1993 - 1996)
Piston stroke80 (mm)
Compression ratio10
E31 840i 4.0 MT (1993 - 1996)
Piston stroke80 (mm)
Compression ratio10
E31 840i 4.4 AT (1995 - 1999)
Piston stroke82.7 (mm)
Compression ratio10
E31 840i 4.4 MT (1995 - 1999)
Piston stroke82.7 (mm)
Compression ratio10
E31 850i 5.0 AT (1989 - 1994)
Piston stroke75 (mm)
Compression ratio8.8
E31 850i 5.0 MT (1989 - 1994)
Piston stroke75 (mm)
Compression ratio8.8
E31 850i 5.4 AT (1994 - 1999)
Piston stroke79 (mm)
Compression ratio10
E31 850i 5.6 MT (1992 - 1996)
Piston stroke80 (mm)
Compression ratio9.8

Warning: the above data are official figures of the manufacturers, however, it should be borne in mind that the information is for reference and does not guarantee unambiguous accuracy.


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