Removing and installing alternator, 2.5 l, 125 kW injection engine — VW

🧭 Before you start

Fits: VW Golf VI (5K, 2008–2013)

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• When batteries are disconnected and reconnected, the procedure described in the workshop manual must be strictly observed . — Disconnect battery .
• Before installing the air conditioner compressor, ensure that both centring sleeves are inserted in the threaded holes of the ancillary bracket.

📋 Procedure

1. ⚠ When batteries are disconnected and reconnected, the procedure described in the workshop manual must be strictly observed . — Disconnect battery .
2. Remove noise insulation General body repairs, exterior50 Noise insulation.
3. ⚠ Before removing, mark the top side and direction of rotation of the poly V-belt. When installing, ensure correct fitting position and direction of rotation. If the belt is installed in the wrong position or against direction of rotation, the belt will be destroyed! — Remove poly V-belt 5-cylinder injection engine (2.5 l engine, 4-valve)13Dismantling and assembling engine; Removing and installing poly V-belt.
4. Release and disconnect connector (1) and remove securing bolt for (2) air conditioner compressor.
5. Unscrew both securing bolts (arrows) and remove air conditioner compressor from ancillary bracket. [Note: Ensure that both centring sleeves are not lost.The hoses of the air conditioner compressor can remain connected.Suspend the air conditioner compressor (2) using a piece of wire (1) at a suitable position until it is ready to be reinstalled.Ensure that the connected hoses are not stretched or kinked when doing this.]

6. Unscrew both securing bolts (arrow) and remove lower idler roller (1) from ancillary bracket.
7. Unscrew the 3 securing bolts (arrows) and remove the upper idler roller (1) from ancillary bracket.
8. Disconnect DF wire connector (2) and pull off protective cap (1).
9. Unscrew nut beneath and remove B+ (battery positive) wire (arrow) from alternator.
10. Unbolt wiring retainer from alternator (3).
11. Unscrew tensioning roller bolts (arrows) and remove tensioning rollers (1 and 2).
12. Remove upper securing bolt of alternator (arrow).
13. Remove lower securing bolt from alternator (arrow) and remove alternator downwards out of vehicle. [Note: Before installing the air conditioner compressor, ensure that both centring sleeves are inserted in the threaded holes of the ancillary bracket.]
14. ⚠ When installing used poly V-belts observe the direction of rotation marked on removal!Before installing poly V-belt, ensure that all ancillaries (alternator, air conditioner compressor) are secure.When fitting belt, ensure that poly V-belt seats correctly in pulleys! — Drive threaded sleeves (A) about 4 mm in direction of arrow out of alternator housing.
15. Tighten cable retainer (arrow) to rear of alternator in 8 o'clock position.
16. Tighten threaded connections to torques specified in assembly overview .
17. ⚠ Observe notes for battery terminal clamp bolt . — Reconnect battery .
18. Start engine and check belt is running correctly.

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