Piston - BMW D7 Workshop Manual

Piston

Note
Heat piston to remove piston pin
- Remove the gudgeon pin snap rings and press
out the gudgeon pin by hand while the parts are
still warm (29).
Piston Dimension
Piston dia
Oversize
Overall length
Piston ring gap
(new condition)
Unscrew Piston
Detach
Repair Data
D7 nominal
values
mm 72.96
mm +1.00
mm
mm 0.25 – 0.4
In the following cases, the piston is unusable:
- ring land between the rings broken
- piston scuffed
ring groove worn out
-
- and cracked
Piston rings are unusable when the gap is too
big
Max. allowable
Remarks
wear (mm)
82mm
Up to 2.00
13