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:
Removing And Installing/Replacing Feed And Return Lines For Engine Oil
Cooler (N63)
WARNING: Risk of scalding!
Only perform this repair work after engine has cooled down.
IMPORTANT: Wear protective gloves and safety goggles.
IMPORTANT: Adhere to conditions of absolute cleanliness when performing
repair work on
the engine oil circuit.
When removing engine oil pipes and engine oil
Mounting
SUBSEQUENT INSTALLATION OF WHEEL-BOLT LOCK
Loosen wheel bolts.
Raise car so that wheel can be turned freely.
Release wheel studs to such an extent that the wheel can move freely on the
wheel hub.
Turn wheel so that valve is face down.
Remove top wheel stud and insert wheel stud lock.
Fig. 72:
