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Home >> Mini >> 2011 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Technical Data (R56) -- Cooper >> Pistons With Rings And Pins >> N14 Engine >> 11 25 Pistons with rings and pins

11 25 Pistons with rings and pins

NOTE: For diameter of cylinder bore, refer to ENGINE BLOCK .
PISTONS WITH RINGS AND PINS SPECIFICATION - 1 OF 2

1st groove    
End clearance mm 0.25... 0.35
Contact clearance (wear limit) mm 0.91
Axial play mm 0.030... 0.070
2nd groove    
End clearance mm 0.35... 0.50
Contact clearance (wear limit) mm 1.06
Axial play mm 0.030... 0.070
3rd groove    
End clearance mm 0.10... 0.35
Contact clearance (wear limit) mm 0.82
Axial play mm 0.030... 0.070
PISTONS WITH RINGS AND PINS SPECIFICATION - 2 OF 2

Piston and pin are paired to each other - replace together only.    
Measuring point "A" (position) mm 10
Piston diameter at measuring point "A"    
Original (new dimension) mm 76.964... 76.992
Piston running clearance mm 0.008... 0.050
Permissible total wear tolerance between piston and cylinder (engine operated) mm 0.130