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Home >> BMW >> 2009 >> M3 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Engine - Technical Data -- E90) >> Pistons With Rings And Pins S65 >> 11 25 Pistons with Rings and Pins S65

11 25 Pistons with Rings and Pins S65

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PISTONS WITH RINGS AND PINS SPECIFICATION

1st groove    
End clearance mm 0.15... 0.30
Axial play mm 0.020... 0.060
2nd groove    
End clearance mm 0.40... 0.60
Axial play mm 0.020... 0.060
3rd groove    
End clearance mm 0.1... 0.3
Axial play mm cannot be measured


PISTONS WITH RINGS AND PINS SPECIFICATION

Piston and pin are paired to each other - replace together only.    
Measuring point "A" (position) mm 14
Piston diameter at measuring point "A"    
Original (new dimension) mm 91.990 ± 0.01
Oversize (new dimension) mm 92.190 ± 0.01
Piston installation clearance (piston new) mm 0.000... 0.032
Piston installation clearance (piston worn) mm 0.020... 0.047
Permissible total wear tolerance between piston and cylinder (engine operated) mm 0.050