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Home >> BMW >> 2009 >> 135i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1022 (Engine - Technical Data (N52K)) >> Piston With Rings And Pin >> 11 25 Pistons With Rings And Pins N52K B30

11 25 Pistons With Rings And Pins N52K B30

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
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 84.990 ±0.010
Repair stage (new dimension) mm %
Oversize (new dimension) mm 85.240 ±0.010
Piston installation clearance (piston new) mm 0.000...0.034
Piston installation clearance (piston worn) mm 0.020...0.047
Permissible total wear tolerance between piston and cylinder
(engine operated)		 mm 0.150


PISTONS WITH RINGS AND PINS SPECIFICATION

1st groove
End clearance mm 0.150... 0.300
Axial play mm 0.020... 0.070
2nd groove
End clearance mm 0.300... 0.500
Axial play mm 0.020... 0.060
3rd groove
End clearance mm cannot be measured
Axial play mm cannot be measured
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