Removing and installing poly V-belt, poly V-belt drive with tensioning roller and air-conditioning compressor — VW

🧭 Before you start

Fits: VW Polo 6R (2009–2014), VW Touran I (1T, 2003–2015), VW Passat B6 (3C, 2005–2010), VW Golf VI (5K, 2008–2013), VW Golf Cabriolet (517, 2011–2016), VW Passat B7 saloon (362, 2010–2014), VW Passat B7 Variant (365, 2010–2014); platform code 521

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• Before installing poly V-belt, ensure that all ancillaries (alternator, air conditioner compressor) are secured tightly.When installing poly V-belt, check direction of belt rotation and proper seating of belt in pulleys.

🔧 Engine codes this applies to

🔩 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 noise insulation:
2. Loosen right wheel housing liner in front area.
3. Unscrew bolts (3, 4, 6).
4. Carefully push coolant lines (5) slightly to the side.
5. Unscrew bolt for poly V-belt idler pulley (arrow) until poly V-belt can be removed easily.

6. Remove poly V-belt.
7. Using a brush, coat guide surfaces of idler pulley with lubricating paste. Electronic Parts Catalogue (EKTA) G 052 751 A1.
8. Fit poly V-belt on poly V-belt pulley:
9. Now insert idler pulley, with its bolt, into guide of ancillary bracket.
10. Tighten bolt in 5 stages.
11. Move coolant lines (5) back to installation positions and tighten (3, 4, 6). 8 Nm. — 8 Nm (5.9 lb-ft)
12. Turn engine at least one turn in direction of rotation at the belt pulley/vibration damper central bolt. [Note: Before installing poly V-belt, ensure that all ancillaries (alternator, air conditioner compressor) are secured tightly.When installing poly V-belt, check direction of belt rotation and proper seating of belt in pulleys.]
13. Start engine and check belt running.
14. If necessary, install front right wheel housing liner.
15. Install noise insulation:

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