1 Series E81 130i (N52K) 3-door
11 25 671
Replacing piston rings on all pistons (N52K)
Necessary preliminary tasks:
•
Removing all pistons
Measuring axial clearance of piston rings in piston ring groove.
Technical Data.
Note:
It is not possible to measure the axial clearance of the U-flex
rings.
Remove plain compression ring and stepped ring upwards with
piston ring pliers.
The U-flex ring comprises two steel band rings and a support
spring.
Note:
The U-flex ring cannot be removed with piston ring pliers.
Put aside all piston rings in correct sequence and installation
position.
It might not be possible to find the identification on used piston
rings.
Installation:
New pistons may only be installed together with new piston rings.
RA Replacing piston rings on all pistons (N52K)
BMW AG - TIS
22.01.2013 03:24
Issue status (12/2007) Valid only until next DVD is issued
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