Turbocharger Overview

Turbocharger Overview

• Secure all hose connections using hose clamps appropriate for the model type.

• Hose connections and charge air system hoses must be free of oil and grease before installing. On connector couplings, the seal and sealing surfaces must only be lightly oiled. Refer to => [ Air Ducts with Connector Couplings ] Air Ducts with Connector Couplings.

• Charge air system must be properly sealed.

• Replace the self-locking nuts.

• Hose clip pliers (VAS 6362) or hose clip pliers (V.A.G 1921) are recommended for installing spring clamps.

• Add oil to turbocharger through oil feed line connecting piece.

• After installing turbocharger, let engine idle for approximately 1 minute without increasing engine speed. This ensures adequate oil supply to the turbocharger.

• Observe the rules for cleanliness, refer to => [ Clean Working Conditions ] Clean Working Conditions.

Part I

Part II

Part III






1 Turbocharger

• Can only be replaced with exhaust manifold and pressure unit.

• Removing and installing, refer to => [ Turbocharger ] Turbocharger

2 Hose

3 Turbocharger Vacuum Diaphragm

• Can be replaced only with the turbocharger

4 Hose Clamp

5 Hose

6 Hose

7 Bolt

• 3 Nm

8 Wastegate Bypass Regulator Valve (N75)

9 Hose

10 Turbocharger Recirculating Valve (N249)

• Note installation position => [ Installed Position ]

11 Bolt

• 7 Nm

12 O-ring

• Replace

13 O-ring

• Replace

14 Connection

15 Bolt

• 9 Nm

Installed Position Turbocharger Recirculating Valve (N249)





- Note installed location - arrows -.

Part II

Part I

Part III






1 Turbocharger

• Can only be replaced with exhaust manifold and pressure unit.

• Removing and installing, refer to => [ Turbocharger ] Turbocharger

2 Bolt

• 9 Nm

3 Crankcase Ventilation Pipe

4 Gasket

• Replace

5 Seal

• Replace

6 Bolt

• 30 Nm

7 Oil Supply Line

8 Bolt

• 9 Nm

9 Bolt

• 9 Nm

10 O-ring

• Replace

11 Seal

• Replace

12 Bolt

• 35 Nm

13 Bolt

• 9 Nm

14 Bolt

• 35 Nm

15 Seal

• Replace

16 Coolant Supply Line

17 Bolt

• 9 Nm

18 Bolt

• 9 Nm

19 Gasket

• Replace

20 Oil Return Pipe

21 Gasket

• Replace

Part III

Part I

Part II






1 Gasket

• Replace

2 Nut

• Replace

• Tightening order => [ Turbocharger Tightening Sequence ]

• Coat the exhaust manifold stud bolts with hot bolt past; hot bolt paste, refer to the electronic parts catalog ETKA.

3 Bolt

• 35 Nm

4 Seal

• Replace

5 Coolant Return Line

6 Bolt

• 9 Nm

7 Turbocharger

• Can only be replaced with exhaust manifold and pressure unit.

• Removing and installing, refer to => [ Turbocharger ] Turbocharger

8 Bolt

• 30 Nm

9 Bracket

10 Brace

11 Bolt

• 30 Nm

12 Bolt

• 30 Nm

• Coat the bolt with hot bolt paste; hot bolt paste, refer to the electronic parts catalog ETKA.

13 Nut

• Replace

• 30 Nm

• Do not open when removing turbocharger

• Coat the exhaust manifold stud bolts with hot bolt past; hot bolt paste, refer to the electronic parts catalog ETKA.

14 Fastening Strip

Turbocharger Tightening Sequence





- Tighten the bolts - 1 through 5 - in 4 stages as follows:

- Tighten the bolts to 5 Nm.

- Tighten the bolts to 12 Nm.

- Tighten the bolts to 16 Nm.

- Tighten the bolts to 25 Nm.