18 12 030 Replacing rear silencer (B48, B46)

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WARNING: Risk of burning !
Only perform this repair work after engine has cooled down.

WARNING: Danger of injury !
Call on the assistance of a second person to remove the rear silencer.

Necessary preliminary tasks:

Support rear silencer with a suitable jack and secure against falling down.

Removal:

Loosen screws (1).

Remove cross strut (2) on rear axle support.

Fig 1: Cross Strut And Screws

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Fig 2: Separation Point Line Mark On Pipe

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NOTE: If the separation point line is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new rear silencer.
Carry over separation point to faulty rear silencer and mark.
Secure rear silencer against falling off.
Cut through exhaust pipes at marked point with a suitable tool.

Spray rubber mount (1) with lubricant and detach from exhaust system.

Fig 3: Exhaust System Rubber Mount

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Replaced damaged rubber mounts.

Parts: Rubber mount

Fig 4: Rear Silencer Rubber Mount

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Spray rubber mount (1) with lubricant and pull off from rear silencer.

Replaced damaged rubber mounts.

Parts: Rubber mount

Lower and remove rear silencer with assistance of a second person.

Installation:

Install new rear silencer and connect rubber mount (1) to rear silencer.

Fig 5: Rear Silencer Rubber Mount

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Connect rubber mount (1) to rear silencer.

Fig 6: Exhaust System Rubber Mount

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Adjust new rear silencer and connect by clamp to center silencer.

Center clamp and tighten down.

Tightening torque 18 20 3AZ .

Fig 7: Rear Silencer Clamp

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Fig 8: Cross Strut And Screws

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Install cross strut (2) on rear axle support.

Tighten down screws (1).

Tightening torque 33 31 2AZ .

Required follow-up work:

Check exhaust system for leak tightness.