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Home >> BMW >> 2018 >> X5 M >> Repair and Diagnosis >> General Information >> OEM General Information >> Technical Data -- X5 M (F85) >> 11 Engine Technical Data >> 1125 Piston With Rings And Bolts Technical Data (X5 M)

1125 Piston With Rings And Bolts Technical Data (X5 M)

11 25 PISTONS WITH RINGS AND PINS S63T2 B44 SPECIFICATION

1st groove
Height mm 1.21... 1.25
End clearance mm 0.15...0.25
Side clearance mm 0.02...0.08
2st groove
Height mm 1.51... 1.53
End clearance mm 0.35...0.55
Side clearance mm 0.02...0.06
3rd groove
Height mm 2.01... 2.03
End clearance without spiral expander mm 0.25...0.50
Side clearance without spiral expander mm 0.02... 0.06
11 25 PISTONS WITH RINGS AND PINS S63T2 B44 SPECIFICATION

Piston and pin are paired to each other - replace together only.
Measuring point "A" (position) mm 8
Piston diameter at measuring point "A"
Original (new dimension) mm 88.97... 88.99
Oversize (0.25) mm 89.22... 89.24
Oversize (0.50) mm %
Piston installation clearance (piston new) mm 0.03...0.04
Piston installation clearance (piston worn) mm 0.02...0.05
Permissible total wear tolerance between piston and cylinder (engine operated) mm 0.15