Removing and installing poly V-belt pulley on alternator: VW Phaeton

🧭 Before you start

Fits: VW Phaeton (3D)

• Special tools named: 17 mm ring spanner, torque wrench

Don't miss

• The thread on the alternator shaft is left-handed. To loosen the connection turn clockwise and to tighten it turn anti-clockwise.
• Loosen threaded connection by turning clockwise. Counterhold with ring spanner when doing this.
• Counterhold adapter3400(1) using 17 mm ring spanner and tighten poly V-belt pulley with freewheel by turning alternator shaft anti-clockwise using torque wrench (2). Tightening torque is 80 Nm.

🔩 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. Remove alternator .
2. Clamp alternator on bracket points in bench vice.
3. Remove protective cap from poly V-belt pulley with freewheel. [Note: The thread on the alternator shaft is left-handed. To loosen the connection turn clockwise and to tighten it turn anti-clockwise.]
4. Insert adapter 3400 (1) with 17 mm ring spanner into poly V-belt pulley with freewheel (2) of alternator. Then insert a M10 multi-point bit (3) into alternator shaft.
5. Loosen threaded connection by turning clockwise. Counterhold with ring spanner when doing this.

6. Hold poly V-belt pulley with freewheel by hand. Turn drive shaft of alternator until poly V-belt pulley with freewheel can be removed.
7. First screw poly V-belt pulley with freewheel on drive shaft of three-phase alternator by hand as far as limit stop.
8. Release socket drive (1) and pull off grip (2).
9. Turn torque wrench grip (2) 180° and reinsert socket drive.
10. Set turning direction of torque wrench to anti-clockwise at socket drive.
11. Counterhold adapter3400(1) using 17 mm ring spanner and tighten poly V-belt pulley with freewheel by turning alternator shaft anti-clockwise using torque wrench (2). Tightening torque is 80 Nm. — 80 Nm (59 lb-ft)
12. Clip protective cap onto poly V-belt pulley with freewheel.

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