18 12 046 Replacing front silencer (N63)
WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2017 BMW 550i GT xDrive, 2017 BMW 535i GT xDrive, 2017 BMW 535i GT, 2016 BMW 550i GT xDrive, and 2016 BMW 535i GT xDrive. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 31 2 220
WARNING:
Risk of burning!
This repair work may only be carried out on an exhaust system which has cooled down.
This repair work may only be carried out on an exhaust system which has cooled down.
Necessary preliminary tasks
- Remove rear UNDERBODY PROTECTION
Support front silencer with special tool 31 2 220 and a suitable universal lifter.
NOTE:
If the separation point is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new front silencer.
Carry over separation point to faulty front silencer and mark.
Secure front silencer against falling out.
Cut through exhaust pipes at marked point with a suitable tool.
Carry over separation point to faulty front silencer and mark.
Secure front silencer against falling out.
Cut through exhaust pipes at marked point with a suitable tool.
Version 1:
Picture shows the left side, the procedure for the right side is identical.
Slacken nut (1).
Tightening torque 18 31 1AZ .
Replace self-locking nuts.
Replace gaskets.
Version 2:
Picture shows the right side, the procedure for the left side is identical.
Release clamp (1).
Tightening torque 18 31 1AZ .
Unscrew nuts (1).
Tightening torque 18 20 1AZ .
Installation note:
Install front silencer, adjust, and connect with clamps.
Center clamps and tighten down.
Tightening torque 18 31 4AZ .
NOTE:
Check exhaust system for leaks.