Z Series E85 Z4 3.0i (N52) ROADST
11 25 Pistons with Rings and Pins N52 B25
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
81.985
±
0.014
Repair stage (new dimension)
mm
%
Oversize (new dimension)
mm
82.235
±
0.014
Piston installation clearance (piston new)
mm
0.000 ... 0.043
Piston installation clearance (piston worn)
mm
0.020 ... 0.047
Permissible total wear tolerance between piston and
cylinder
(engine operated)
mm
0.15
TD Pistons with Rings and Pins N52 / B25
BMW AG - TIS
16.02.2013 06:06
Issue status (12/2007) Valid only until next DVD is issued
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