Removing and installing air conditioner compressor, Passat — VW

🧭 Before you start

Fits: VW Passat B8 (3G, 2014–)

📋 Procedure

1. Remove noise insulation under engine General body repairs, exterior 66. Noise insulation; Assembly overview - noise insulation.
2. Remove poly V-belt 13Cylinder block (pulley end); Removing and installing poly V-belt.
3. Remove bolts (3).
4. Disconnect refrigerant lines (2) and (4) from air conditioner compressor (1).
5. Separate connector (6).

6. Disconnect connector (1).
7. Remove bolts (5).
8. Remove air conditioner compressor (1).
9. Carry out function "“Compressor first run”" in guided fault finding.
10. Clean contact surfaces of air conditioner compressor and holder.
11. Insert dowel sleeves (1) into air conditioner compressor (2). [Note: Improperly fitted dowel sleeves or dirty or damaged contact surfaces can cause deviations in alignment of air conditioner compressor and engine. Deviations in alignment will eventually damage the air condition compressor. If the air conditioner compressor is renewed on account of problems (e.g. internal damage), the refrigerant circuit must be cleaned Air conditioning system - with refrigerant R134a.When it is removed, the air conditioner compressor contains an indeterminate amount of refrigerant oil. For this reason it is important to observe the notes on renewing the air conditioner compressor Air conditioning system - with refrigerant R134a.]
12. Refer to notes on commissioning of air conditioning system after installation of air conditioner compressor Air conditioning system - with refrigerant R134a.
13. Start engine with air conditioner compressor switched off (control lamp in AC button is off) and wait until idling speed is stable.
14. Open dash panel vents.
15. Set temperature to "“Lo”" on heater and air conditioning controlsEX21 or on temperature preselection.
16. Switch on air conditioner compressor (control lamp in AC button lights up) and let it run for at least 5 minutes with engine at idling speed. [Note: The air conditioner compressor is driven by the poly V-belt pulley (not fitted with a magnetic clutch).If an air conditioner compressor seizes, the overload protection separates from the air conditioner compressor shaft. The seizure can normally be detected by the bulges in the poly V-belt pulley. Another indication of a seizure is abraded rubber material around the poly V-belt pulley. The air conditioner compressor has an internal oil circuit to ensure that the air conditioner compressor is not damaged when the refrigerant circuit is empty. This means that approx. 40 to 50 cm3 of refrigerant oil remains in the air conditioner compressor. Only start engine when refrigerant circuits are charged. Only start engine when refrigerant circuit has been correctly installed. If, for example, the refrigerant lines are not connected to the air conditioner compressor and the engine is running, the compressor may heat up to such a degree through internal warming that it will be destroyed. Air conditioning system compressor regulating valve N280 is not activated when the refrigerant circuit is empty and the air conditioner compressor idles with the engine. If it is necessary to start engine with an empty refrigerant circuit:The refrigerant circuit must be fully assembled. At least ¼ of the quantity of refrigerant oil specified for this refrigerant circuit must be in the air conditioner compressor. The engine speed must not exceed 2000 rpm. Run engine only as long as absolutely necessary, max. 10 min.]

Other VW procedures

• Removing engine · 41 torque figures
• Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
• Adjusting valve timing – VW Passat B5 · 83 torque figures
• Removing and installing camshafts – VW Passat B6 · 39 torque figures
• Removing and installing coolant pump · 53 torque figures
• Removing and installing silencer, Sharan
• Removing and installing engine mountings, CC
• Removing and installing slave cylinder with release bearing
• Removing and installing front seat backrest – VW Polo 6R
• Removing and installing battery, vehicles with starter battery in engine compartment