Removing and installing poly V-belt with idler roller and air conditioner compressor — VW

🧭 Before you start

Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5

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

🔧 Engine codes this applies to

📐 80 workshop diagrams for CAYB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove noise insulation General body repairs, exterior50Body - front; Assembly overview - noise insulation
2. Remove front right wheel housing liner.
3. Unscrew bolt for idler roller/poly V-belt (2) until poly V-belt can easily be removed.
4. Take poly V-belt off belt pulleys.
5. Place new poly V-belt on belt pulley/vibration damper, alternator and air conditioning compressor .

6. Coat guide surfaces of idler roller with lubricating paste using a brush electronic parts catalogue G 052 751 A1.
7. Now insert the idler roller with its bolt into the guide of the ancillary bracket.
8. Tighten bolt for idler roller/poly V-belt (2) up to head by hand »the poly V-belt will be tensioned «.
9. Tighten bolt for idler roller/poly V-belt (2) further to stop »the poly V-belt will be tensioned further«.
10. Loosen bolt (2) another 1/4 turn. Now tighten bolt (2).
11. Now turn the 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 fitting poly V-belt, check direction of belt rotation and proper seating of belt in belt pulleys.]
12. Start engine and check that belt runs properly.
13. Install front right wheel housing liner.
14. Install noise insulation General body repairs, exterior50Body - front; Assembly overview - noise insulation.

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