Audi Q3: Overview - A/C Compressor Power Unit

Overview - A/C Compressor Power Unit, 4-Cylinder Engine

1 - Ribbed Belt

• Check for wear
• Removing and installing. Refer to → Rep. Gr.13; Cylinder Block, Belt Pulley Side; Ribbed Belt, Removing and Installing.
• Mark the rotation direction, install on correct side. Refer to → Rep. Gr.13; Cylinder Block, Belt Pulley Side; Ribbed Belt, Removing and Installing.

2 - Alignment Sleeve

• Quantity: 2

3 - Auxiliary Component Bracket

• There are different versions. Refer to the Parts Catalog.
• To remove and install, refer to → Engine Mechanical, Fuel Injection and Ignition; Rep. Gr.13; Cylinder Block, Belt Pulley Side; Auxiliary Components Bracket, Removing and Installing.

4 - O-Ring Seal

• Replacing. For the correct version, refer to the Parts Catalog.
• Coat with refrigerant oil before installing. Refer to → Chapter "Refrigerant Circuit Seals".

5 - High Pressure Side Refrigerant Line

6 - Bolt

• Tightening specification. Refer to → Chapter "Overview - Condenser, A/C Compressor, Expansion Valve, Refrigerant Line".

7 - Bolt

• Tightening specification. Refer to → Chapter "Overview - Condenser, A/C Compressor, Expansion Valve, Refrigerant Line".

8 - Low Pressure Side Refrigerant Line

9 - O-Ring Seal

• Replacing. For the correct version, refer to the Parts Catalog.
• Coat with refrigerant oil before installing. Refer to → Chapter "Refrigerant Circuit Seals".

10 - A/C Compressor Regulator Valve -N280-

• To check, refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function, → Chapter "A/C Compressor Regulator Valve -N280-, Checking Switch-On Signal" and → Wiring diagrams, Troubleshooting & Component locations.

  Note

• Certain functions on the A/C Compressor Regulator Valve -N280- (for example, a stuck valve or a disruption in the coil) can lead to a complaint regarding the A/C compressor (A/C system doesn't cool, the evaporator ices over, etc.). If the cause is with the A/C Compressor Regulator Valve -N280- (and not the A/C compressor itself), the A/C compressor can be serviced by replacing the A/C Compressor Regulator Valve -N280-. Refer to → Refrigerant R134a Servicing; Rep. Gr.87; Refrigerant Circuit Components, Replacing (Refrigerant R134a, Servicing; Refrigerant Circuit Components, Replacing).
• The A/C Compressor Regulator Valve -N280- is not available as a replacement part for all A/C compressors. If the A/C Compressor Regulator Valve -N280- is not available as an individual A/C compressor part (different versions), then the entire A/C compressor must be replaced. Refer to the Parts Catalog.

11 - A/C Compressor

• There are different versions. Refer to the Parts Catalog.
• Refrigerant line, disconnecting and reconnecting. Refer to → Chapter "Refrigerant Lines, Disconnecting and Connecting at A/C Compressor".
• Removing from and attaching to the bracket. Refer to → Chapter "A/C Compressor, Removing and Installing on Bracket".
• Removing and installing. Refer to → Chapter "A/C Compressor, Removing and Installing".

12 - Bolt

• Quantity: 3
• There are different versions. Refer to the Parts Catalog.
• Tightening specification for steel bolts: 25 Nm
• Tightening specification for aluminum bolts: 8 Nm +180º
• Only use aluminum bolts once, then replace.

13 - Belt Pulley with Overload Protection

• There are different versions. Refer to the Parts Catalog.
• Overview. Refer to → Chapter "Overview - Belt Pulley".

Overview - A/C Compressor Power Unit, 5-Cylinder Engine (Audi RS Q3)

1 - Auxiliary Component Bracket

• There are different versions. Refer to the Parts Catalog.
• To remove and install, refer to → Engine Mechanical, Fuel Injection and Ignition; Rep. Gr.13; Cylinder Block, Belt Pulley Side; Auxiliary Components Bracket, Removing and Installing.

2 - Bolt

• Tightening specification. Refer to → Engine Mechanical, Fuel Injection and Ignition; Rep. Gr.13; Cylinder Block, Belt Pulley Side; Overview - Cylinder Block, Belt Pulley Side.

3 - Bolt

• Tightening specification. Refer to → Engine Mechanical, Fuel Injection and Ignition; Rep. Gr.13; Cylinder Block, Belt Pulley Side; Overview - Cylinder Block, Belt Pulley Side.

4 - Bolt

• Tightening specification. Refer to → Engine Mechanical, Fuel Injection and Ignition; Rep. Gr.13; Cylinder Block, Belt Pulley Side; Overview - Cylinder Block, Belt Pulley Side.

5 - A/C Compressor

• There are different versions. Refer to the Parts Catalog.
• Refrigerant line, disconnecting and reconnecting. Refer to → Chapter "Refrigerant Lines, Disconnecting and Connecting at A/C Compressor".
• Removing from and attaching to the bracket. Refer to → Chapter "A/C Compressor, Removing and Installing on Bracket".
• Removing and installing. Refer to → Chapter "A/C Compressor, Removing and Installing".

6 - Bolt

• Quantity: 3
• There are different versions. Refer to the Parts Catalog.
• Tightening specification for steel bolts: 25 Nm
• Tightening specification for aluminum bolts: 8 Nm +180º
• Only use aluminum bolts once, then replace.

7 - Alignment Sleeve

• Quantity: 2
• Be careful to use the correct version and make sure the subassembly bracket and A/C compressor fit correctly.

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