A/C Compressor Drive Unit Overview

2012 Audi A6 Sedan (4G2) L4-2.0L Turbo (CAEB)SECTION A/C Compressor Drive Unit Overview





A/C Compressor Drive Unit Overview

Due to the installation position of the A/C compressor, the drive unit can only be checked after the subframe and the left engine mount have been removed. Refer to => [ A/C Compressor ] A/C Compressor.






1 A/C Compressor Input Shaft

60 Nm

There must be no play in the threaded connection seated in the engine drive wheel splines.

Grease the splines to the engine drive wheel with grease (G 000 100). Refer to Electronic Parts Catalog (ETKA).

Loosening and tightening, refer to => [ A/C Compressor Input Shaft, Loosening and Tightening ] A/C Compressor Input Shaft, Loosening and Tightening.

Removing and installing, refer to => [ A/C Compressor Input Shaft ] A/C Compressor Input Shaft.

2 Hex Socket Head Bolt

10 Nm

3 Drive Plate

The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the drive shaft runs freely without driving the A/C compressor.

Check the run-out. Refer to => [ A/C Compressor Drive Plate with Overload Protection, Checking Run-Out and Adjusting ] A/C Compressor Drive Plate With Overload Protection, Checking Run-Out and Adjusting.

Removing and installing, refer to => [ Drive Plate with Overload Protection ] Drive Plate With Overload Protection.

4 Drive Plate

30 Nm

Attached to the A/C compressor input shaft.

The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the drive shaft runs freely without driving the A/C compressor.

Removing and installing, refer to => [ A/C Compressor Drive Plate ] A/C Compressor Drive Plate.

5 Rubber Element

Decouples the drive unit and dampens vibrations and noises.

Install on correct side. Refer to => [ A/C Compressor Drive Plate ] A/C Compressor Drive Plate.

6 Spacer

The original spacer must be installed.

Dimension: 17.5 x 10 x 3 mm

7 Circlip

Replace

Install on the proper side - the Flat side faces A/C compressor.

8 Drive Plate

With roller bearing

Removing and installing, refer to => [ Drive Plate with Anti-Friction Bearing ] Drive Plate With Anti-Friction Bearing.

Clean the A/C compressor flange before installing the drive plate.

9 A/C Compressor

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.