BMW 7 Series: Replacing Center Muffler (N63)
Notes
WARNING: Scalding hazard! Only perform these tasks after exhaust system has cooled down.
Support center silencer with special tool 31 2 220 and a suitable universal lifter.
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Fig. 9: Identifying Centre Silencer With Special Tool 31 2 220
Release screws (1).
Tightening torque 18 20 6AZ.
Only when independent heating is fitted: release screw (2) on metering pump.
Tightening torque 18 20 7AZ.
Release screws (3) on underbody panels.
Remove reinforcement plate (4).
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Fig. 10: Identifying Screw On Metering Pump, Screws On Underbody Panels And
Reinforcement Plate
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 center muffler.
Carry over cutting line to faulty center muffler and mark.
Secure center muffler against falling off.
Cut through exhaust pipes at marked point with a suitable tool.
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Fig. 11: Identifying Cutting Line On Centre Muffler
Picture shows the left side, the procedure for the right side is identical.
Slacken nut (1).
Tightening torque 18 20 4AZ.
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Fig. 12: Identifying Exhaust System Nut
Installation: Adjust center muffler to fit and connect with clamps.
Centre clamp and tighten down.
Tightening torque 18 31 4AZ.
The procedure is identical on both sides.
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Fig. 13: Identifying Centre Muffler With Clamps
NOTE: Check exhaust system for leaks.
READ NEXT:
Replacing Front Silencer (N63)
Notes
WARNING: Risk of burns! Only perform these tasks after exhaust system
has cooled down.
Necessary preliminary work
Remove rear UNDERBODY PROTECTION
F03 Only:
Remove underbody protection on l
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.
Fig. 19: Supporting R
SEE MORE:
Removing And Installing/Renewing Right Exhaust Camshaft (N63)
Notes
Cylinders 1-4:
IMPORTANT: Risk of damage!
The exhaust camshaft must first be rotated in such a way that the camshaft is
free from tension when the bearing caps are released.
Necessary preliminary work
Remove right HIGH-PRESSURE PUMP
Remove right CYLINDER HEAD COVER
Remove right EXHAUST CAM
Adjust Door
IMPORTANT: Do not damage adjoining body components.
Minor corrections (realignment work) are permitted if the existing adjustment
options are not sufficient.
NOTE: Observe GAP DIMENSIONS.
The door must be provided with all add-on parts for correct adjustment.
Adjust screwed body components from r
