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.
.png)
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).
.png)
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.
.png)
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.
.png)
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.
.png)
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:
Checking Automatic Safety Belt
General considerations when checking seat belts:
The seat belts must be checked after an accident.
For the check, you should start by trying to get information on which seats in
the car involved in the accident
were occupied. If this is not possible, check all the seat belts in the car and
replac
Housing Cover
REMOVING AND INSTALLING LOWER TIMING CASE COVER (N63)
Necessary preliminary work
Remove ENGINE
Remove both cylinder head covers
Remove LOWER OIL SUMP SECTION
Remove UPPER OIL SUMP SECTION
Remove alternator BELT TENSIONER
Remove VIBRATION DAMPER
Remove COOLANT PUMP
Remove ALTERNATOR
Remove
