Removing and installing alternator - vehicles with 6.3 ltr. FSI engine — AUDI

🧭 Before you start

Disconnect the battery earth, then remove the front right coolant pipe, lower longitudinal member, underbody guard and engine oil cooler. Slacken the belt, detach the coolant hose, connector and B+ wire. Back the bolts out, tap them to release the sliding bushes, remove them and take the alternator out to the right. Drive the bushes back slightly, refit, reconnect and check belt running.

Fits: Audi A8 D4 (4H, 2010–2017)

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• Back the bolts out about 6 turns and tap the heads to free the sliding bushes.
• Free stiff mounting bushes or the clamping force will not be adequate.
• Secure hose connections with the same type of clips as original equipment.
• Check and top up coolant after refitting the pipe and oil cooler, as general practice.

Written for this job from the workshop steps below · TorqFix editorial.

📋 Procedure

1. Disconnect earth cable from battery with ignition switched off .
2. Remove coolant pipe (front right) 19Coolant pipes; Removing and installing coolant pipes.
3. Remove lower longitudinal member and underbody guard General body repairs, exterior50Lock carrier; Exploded view - lock carrier.
4. Remove engine oil cooler 17Engine oil cooler; Removing and installing engine oil cooler.
5. Slacken off poly V-belt and detach from alternator pulley 13Cylinder block (pulley end); Removing and installing poly V-belt.

6. Release hose clip (1) and detach coolant hose.
7. Unplug electrical connector (2).
8. Unscrew nut and detach B+ wire (3).
9. Unscrew bolts (arrows) for alternator approx. 6 turns.
10. Tap carefully on bolt heads with a hammer to release sliding bushes securing alternator.
11. Remove bolts completely.
12. Take out alternator towards right. [Note: Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.Stiff alternator mount bushes must be freed; otherwise the clamping force of the bush will not be adequate even when the bolts are tightened to the correct torque.]
13. To facilitate positioning of alternator, drive back sliding bushes for securing bolts slightly.
14. Connect battery. Steps required .
15. Start engine and check that belt runs properly.

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