Removing and installing pulley (without N25), "“Denso”" air conditioner compressor version "“1”" — AUDI

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

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• Renew circlip (A).
• Ensure that circlip (A) is fitted correctly (bevelled side (C) faces away from air conditioner compressor; flat side faces compressor).
• Thread of new drive plate has been lubricated at factory with a pre-determined amount of a specific grease.
• Before installing drive plate, coat rubber elements (D) slightly with lubricant (e.g. tyre fitting paste or soap solution).

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Perform preparations Preparations for renewing pulley.
2. Remove cap (A).
3. Hold air conditioner compressor drive shaft (B) e.g. with a commercially available hexagon socket wrench (7 mm) and turn drive plate (C) with pulley (E) in direction of (arrow). [Note: The torque for driving the air conditioner compressor is applied to the compressor shaft via the threaded connection between the drive plate (C) and the compressor shaft. If the drive plate (C) has become so firmly attached to the air conditioner compressor shaft that it can no longer be loosened (the 7 mm hexagon socket wrench (B) can no longer transmit the necessary torque), the compressor must be renewed.]
4. Detach drive plate (C).
5. Remove circlip (A).

6. Detach pulley (B). [Note: Renew circlip (A).]
7. Install pulley (B).
8. Ensure that circlip (A) is fitted correctly (bevelled side (C) faces away from air conditioner compressor; flat side faces compressor).
9. Clean thread of compressor shaft. [Note: Thread of new drive plate has been lubricated at factory with a pre-determined amount of a specific grease.]
10. Before installing drive plate, coat rubber elements (D) slightly with lubricant (e.g. tyre fitting paste or soap solution).
11. Insert rubber elements (D) in pulley (B) as shown.
12. Press the rubber element of the drive plate (C) into the pulley (E) until the drive plate (C) makes contact with the thread of the shaft of the air conditioner compressor (B).
13. Secure drive plate (C) to compressor shaft (B) by turning in direction opposite to (arrow).
14. Hold air conditioner compressor drive shaft (B) e.g. with a commercially available hexagon socket wrench (7 mm) and turn drive plate (C) with pulley (E) in direction opposite to that of (arrow) (tightening torque: 30 Nm). — 30 Nm (22 lb-ft)

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