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Home >> BMW >> 2016 >> 428i 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Technical Data - F33 >> Pistons With Rings And Pins - N20, N26 >> 11 25 Pistons with Rings and Pins N20/N26

11 25 Pistons with Rings and Pins N20/N26

PISTONS WITH RINGS AND PINS SPECIFICATION

1st groove    
End clearance mm 0.15...0.30
Side clearance mm 0.03...0.08
2st groove    
End clearance mm 0.30...0.50
Side clearance mm 0.02..0.06
3rd groove    
End clearance mm 0.20...0.90
Side clearance mm can't be measured
PISTONS WITH RINGS AND PINS SPECIFICATION

Piston and pin are paired to each other - replace together only.    
Measuring point "A" (position) mm 12
Piston diameter at measuring point "A"    
Original (new dimension) mm 83.95... 83.96
Repair stage (new dimension) mm %
Oversize (new dimension) mm %
Piston installation clearance (piston new) mm 0.01...0.03
Piston installation clearance (piston worn) mm 0.02...0.05
Permissible total wear tolerance between piston and cylinder (engine operated) mm 0.15