Audi Q3 Owners & Service Manuals

Audi Q3: Overview - Belt Pulley, Valeo A/C Compressor

Audi Q3. Overview - Belt Pulley, Valeo A/C Compressor

1 - Bolt

  • 17 Nm
  • Replacing

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

  • 7 Nm

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

3 - Drive Plate

  • Removing and installing. Refer to → Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".
  • The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor
  • With rubber element for decoupling belt pulley from A/C compressor driveshaft, dampens vibrations and noise

4 - Circlip

  • Replacing
  • Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

5 - Belt Pulley

  • Removing and installing. Refer to → Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

6 - Air Conditioning (A/C) Compressor

  • Clean the A/C compressor driveshaft before setting the belt pulley on it

Overview - Belt Pulley, Sanden A/C Compressor, Version 1

  Note

  • Installed on vehicles with a 4-cylinder engine
  • If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
  • The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
  • The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

Audi Q3. Overview - Belt Pulley, Sanden A/C Compressor, Version 1

1 - Nut

  • 25 Nm

- To loosen and tighten hex nut, hold the belt pulley firmly in place using a commercially available strap wrench (with cloth tape).

- The thread of the nut, which was installed with locking compound, must be cleaned (for example, using a thread tap). Otherwise, there is a danger that the input shaft breaks off during assembly.

- Clean the thread of the A/C compressor input shaft with a wire brush.

- Insert the nut with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

  • 4.5 Nm

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the bolts.

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

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 belt pulley runs freely without driving the A/C compressor
  • With rubber element for decoupling belt pulley from A/C compressor driveshaft, dampens vibrations and noise

4 - Washer

5 - Circlip

  • Replacing
  • Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

6 - Belt Pulley

7 - Air Conditioning (A/C) Compressor

  • Clean the A/C compressor driveshaft before setting the belt pulley on it

Overview - Belt Pulley, Sanden A/C Compressor, Version 2

  Note

  • Installed on vehicles with a 4-cylinder engine
  • If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
  • The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
  • The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

Audi Q3. Overview - Belt Pulley, Sanden A/C Compressor, Version 2

1 - Nut

  • 25 Nm

  Note

The Air Conditioning (A/C) compressor input shaft may be covered with a plastic cap to protect the threads on it (the plastic cap is not illustrated).

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the hex nut.

- The thread of the nut, which was installed with locking compound, must be cleaned (for example, using a thread tap). Otherwise, there is a danger that the input shaft breaks off during assembly.

- Clean the thread of the A/C compressor input shaft with a wire brush.

- Insert the nut with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

  • 12 Nm

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the bolts.

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

3 - Drive Plate

  • The overload protection (securing spring elements); takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor.
  • Drive plate spring elements dampen vibrations and noise

4 - Circlip

  • Replacing
  • Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

5 - Belt Pulley

  • With rubber elements -B- and threaded plates -C- for decoupling belt pulley from A/C compressor input shaft, dampens vibrations and noise

  Note

  • The threaded plates can also be connected to each other by a ring, depending on the version.
  • For "cold climate" vehicles (for example, central and northern Europe), A/C compressors with a smaller displacement are installed. On these A/C compressors, the belt pulley is slightly different from the one illustrated here (the rubber elements -B- are, for example, as a vibration damper not present). Refer to the Parts Catalog.

6 - A/C Compressor

  • Clean the A/C compressor driveshaft before setting the belt pulley on it

Overview - Belt Pulley, Sanden A/C Compressor, Version 3

  Note

  • Installed on vehicles with a 5-cylinder engine
  • If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
  • The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
  • The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

Audi Q3. Overview - Belt Pulley, Sanden A/C Compressor, Version 3

1 - Nut

  Note

The A/C compressor shaft may be covered with a plastic cap to protect the threads on it (the plastic cap is not illustrated).

  • To loosen and tighten hex nut, hold belt pulley firmly in place using a standard band wrench (with webbing).
  • Clean threads of hex nut and threads of A/C compressor shaft of old thread locking compound before screwing on.
  • Install the hex nut with thread locking compound (for example, with D 000 600 A2). Refer to the Parts Catalog.
  • Nut tightening specification: 25 Nm

2 - Bolt

  • To loosen and tighten bolts, hold belt pulley firmly in place using a standard band wrench (with webbing).
  • Tightening specification 12 Nm
  • Clean old bolt locking compound from thread of bolts and threads of belt pulley before screwing on.
  • Install the bolts with thread locking compound (for example, D 000 600 A2). Refer to the Parts Catalog.

3 - Drive Plate

  • the overload protection (securing spring elements), takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor.
  • Drive plate spring elements damp vibrations and noise.

4 - Spacer

5 - Circlip

  • Replace
  • Install on proper side, beveled insertion edge -A- faces away from A/C compressor (install flat side facing the A/C compressor)
  • When installing the circlip, note that it cannot be bent open more than is necessary for installation.

6 - Belt pulley with double belt guide

  • Clean A/C compressor flange before sliding on pulley.
  • With rubber elements -B- and threaded plates -C- for decoupling belt pulley from A/C compressor input shaft (rubber elements damp vibrations and noise).

  Note

  • The threaded plates -C- can also be connected to each other by a ring, depending on the version.
  • On 5-cylinder vehicles (Audi RS Q3), 2 belts are guided over the belt pulley.

7 - A/C Compressor

  • There are different versions depending on engine installed and the market. Refer to the Parts Catalog.
  • Clean A/C compressor flange before sliding on pulley.

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