BMW 7 Series: Replacing Left Or Right Rear Silencer (N63)
Notes
WARNING: Scalding hazard! Only perform these tasks after exhaust system has cooled down.
Support rear silencer with special tool 31 2 220 and a suitable universal lifter.
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Fig. 19: Supporting Rear Silencer With Special Tool 31 2 220
NOTE: If the cutting line is not marked by a punch mark in the pipe, determine the cutting line by means of the pipe length on the new rear muffler.
Carry over cutting line to faulty rear muffler and mark.
Secure rear silencer against falling off.
Cut through exhaust pipes at marked point with a suitable tool.
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Fig. 20: Identifying Cutting Line On Rear Muffler
Picture shows the left side, the procedure for the right side is identical.
Slacken nut (1).
Tightening torque 18 20 5AZ.
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Fig. 21: Identifying Exhaust System Nuts
Picture shows the left side, the procedure for the right side is identical.
Slacken nut (1).
Tightening torque 18 20 5AZ.
Detach hose (2) on vacuum unit.
Lower and remove rear muffler with assistance of a second person.
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Fig. 22: Identifying Nut And Hose On Vaccum Unit
Installation: Install, fit new rear silencer and connect with hose clamp.
Centre clamp and tighten down.
Tightening torque 18 31 4AZ.
The procedure is identical on both sides.
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Fig. 23: Identifying Rear Silencer With Hose Clamp
NOTE: Check rubber mount for damage.
Replace damaged rubber mount.
Check exhaust system for leaks.
READ NEXT:
Removing And Installing/Renewing Catalytic Converter Cylinder 5-8
(N63)
WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.
Necessary preliminary work
Remove ACOUSTIC COVER.
REMOVE BOTH INTAKE SILENCER HOUSINGS.
Remove EXHAUST SY
Removing And Replacing The Catalytic Converter Cylinder 1-4 (N63)
WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.
Necessary preliminary work
Remove ACOUSTIC COVER.
REMOVE BOTH INTAKE SILENCER HOUSINGS.
Remove EXHAUST SY
SEE MORE:
Axle Mounting
REPLACING ALL RUBBER MOUNTS FOR REAR AXLE SUPPORT
Notes
IMPORTANT: Before removing rear axle support:
In order to avoid damage to vehicle hoist, perform weight compensation on
vehicle.
Load luggage compartment with sand bags.
Necessary preliminary work
Remove REAR AXLE SUPPORT
IMPORTANT: Risk of
Driver Assistance Functions
Depending on the equipment specification, two driver assistance functions
that act on the longitudinal dynamics
of the vehicle can be integrated in the ICM control unit:
Cruise control with braking function (Dynamic Cruise Control, DCC) and
Active cruise control with stop&go function (ACC St
