Detaching and attaching pulley (without N25), "“Denso”" air conditioner compressor version "“2”" — AUDI

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

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• Ensure correct insertion of the circlip (A). The bevelled side (C) faces away from the air conditioner compressor (flat side faces compressor).

🔩 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 preliminary work Preparations for renewing pulley.
2. Remove the poly V-belt 13Cylinder block, pulley side; Removing and installing poly V-belt.
3. Use a small screwdriver or pointed-nose pliers, for example, to carefully remove the circlip (A) (with the vulcanised rubber disc ), taking particular care not to damage the pulley.
4. Hold the air conditioner compressor drive shaft (B) in position with a commercially available Allen key and turn the drive plate (C) with the pulley (D) in the direction of arrow (E) (tightening torque 35 Nm). — 35 Nm (26 lb-ft)
5. Detach the drive plate (C).

6. Remove circlip (A).
7. Detach pulley (B). [Note: If the pulley cannot be detached with the air conditioner compressor in position, detach the air conditioner compressor with the refrigerant lines connected: 4-cyl. engine , 6-cyl. diesel engine Detaching air conditioner compressor from holder/attaching - vehicles with 6-cyl. engine. On vehicles with a 6-cyl. FSI / TFSI engine the air conditioner compressor has to be removed Removing and installing air conditioner compressor, vehicles with 6-cyl. engine.] [Note: Replace the circlip (A).]
8. Fit the pulley (B).
9. Ensure correct insertion of the circlip (A). The bevelled side (C) faces away from the air conditioner compressor (flat side faces compressor).
10. Insert the rubber elements (D) in the pulley (B) as shown.
11. For fitting the drive plate, moisten the rubber elements (D) slightly with tyre assembly paste or soap solution for example to provide lubrication.
12. Insert the drive plate (C) in the rubber elements (D) (refer to illustration above) until it makes contact with the shaft of the air conditioner compressor (B).
13. Screw the drive plate (C) onto the compressor shaft (B) by turning it in the direction of arrow (F).
14. By turning it with a commercially available strap wrench (fabric strap) in the direction of arrow (F), tighten the drive plate (C) (by way of the pulley (D)) to 35 Nm. Hold the compressor shaft (B) in position with a commercially available Allen key. — 35 Nm (26 lb-ft)
15. Fit the circlip (A) (with vulcanised rubber disc).

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