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.

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.

Cut through exhaust pipes at marked point with a suitable tool.

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.

Fig. 16: Identifying Exhaust System Nuts

Unscrew nuts (1).

Tightening torque 18 20 1AZ.

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.

Fig. 18: Identifying Front Silence With Clamps

NOTE: Check exhaust system for leaks.

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