Overview - Cylinder Block, Belt Pulley Side, Starter Generator Belt Drive, 2.9L/3.0L Engine

WARNING: This page is about a different car, the 2024 Audi A8 Quattro, 2023 Audi A8 Quattro, and 2022 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Cylinder Block, Belt Pulley Side, Starter Generator Belt Drive, 2.9L/3.0L Engine

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 40 Nm
Tensioner
- For the ribbed belt
- Removing and Installing. Refer to RIBBED BELT TENSIONER FOR STARTER GENERATOR, REMOVING AND INSTALLING, 2.9L/3.0L ENGINE .
Ribbed Belt
- Check for wear
- Do not kink
- Belt path. Refer to Fig 2.
- Before removing, mark the running direction using chalk or a felt-tip pen.
- Removing and Installing. Refer to RIBBED BELT FOR STARTER GENERATOR, REMOVING AND INSTALLING, 2.9L ENGINE .
- When installing, make sure it is seated correctly on the belt pulleys
Belt Pulley
- For the coolant pump
Bolt
- Tightening specifications. Refer to OVERVIEW - GENERATOR .
Nut
- Tightening specifications. Refer to OVERVIEW - GENERATOR .
Threaded Pin
- Tightening specifications. Refer to OVERVIEW - GENERATOR .
Starter Generator -C29-
- Removing and installing. Refer to GENERATOR, REMOVING AND INSTALLING .
Bracket
- For the starter generator
- Removing and Installing. Refer to STARTER GENERATOR BRACKET, REMOVING AND INSTALLING .
Bolt
- Tightening specification and sequence. Refer to Fig 3.
Alignment Sleeves
Bracket
- For the idler roller
Bolt
- 25 Nm
Idler Roller
- For the ribbed belt
Bolt
- 40 Nm
- Replace after removing
Cover
- For the idler roller
Vibration Damper
- Removing and Installing. Refer to VIBRATION DAMPER, REMOVING AND INSTALLING .
Bolt
- 150 Nm +90°
- Replace after removing

Starter Generator Belt Path

Fig 2: Starter Generator Belt Path

Courtesy of AUDI OF AMERICA, LLC

Starter Generator
Upper Tensioning Roller
Idler Roller
Coolant Pump
Vibration Damper
Lower Tensioning Roller

Starter Generator Bracket 1 - Tightening Specifications and Tightening Sequence

Fig 3: Starter Generator Bracket -1- - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in stages as follows:

Step	Bolts	Tightening Specifications
1.	-arrows-	8 Nm diagonally
2.	-arrows-	22 Nm diagonally