BMW 7 Owners & Service Manuals

BMW 7 Series: 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 left and right

Support front silencer with special tool 31 2 220 and a suitable universal lifter.

Mufflers
Fig. 14: Supporting Front Silencer With Special Tool 31 2 220

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.

Mufflers
Fig. 15: Identifying Cutting Line Front Silencer

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 seals.

Mufflers
Fig. 16: Identifying Exhaust System Nuts

Unscrew nuts (1).

Tightening torque 18 20 1AZ.

Mufflers
Fig. 17: Identifying Unscrew Nuts

Installation note: Install front silencer, adjust, and connect with clamps.

Centre clamps and tighten down.

Tightening torque 18 31 4AZ.

Mufflers
Fig. 18: Identifying Front Silence With Clamps

NOTE: Check exhaust system for leaks.

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