6 Series 630i (N53) Coupe
If necessary, replace connecting rods.
Important!
Connecting rods are divided into weight categories and are
only available as a set.
Old and new connecting rods must not be installed in mixed
combinations.
Installation:
The gudgeon pin must be able to be pressed through the liner by
hand with little force and must not display any significant play.
Measure piston installation clearance:
Measure piston diameter with micrometer at measuring point A
from bottom edge of piston and offset at 90
°
to the axis of the
gudgeon pin.
Piston diameter at measuring point A.
Adjust micrometer to cylinder bore of engine block. Set internal
calliper on micrometer to zero. Measure bottom, centre and top of
cylinder bore in direction of travel and direction of engine rotation.
Diameter of cylinder bore.
Piston installation clearance.
Total permissible wear tolerance.
If necessary, replace piston.
Warning!
Protective goggles must be worn.
Important!
The opening of the gudgeon pin circlip must be installed in
the 12 o'clock position on the piston - risk of damage.
Insert gudgeon pin circlip (2) into groove of special tool
11 4 493 .
Bring gudgeon pin circlip (2) into assembly position (1).
RA Removing and installing or replacing all pistons (N53)
BMW AG - TIS
17.01.2013 11:19
Issue status (12/2007) Valid only until next DVD is issued
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