Turbocharger Component Overviews
Turbocharger Component Overviews
I - => [ Recirculation and Wastegate Bypass Regulation Valves ]
II - => [ Coolant Supply, Oil Supply and Oil Return Line ]
III - => [ Coolant Return and Turbocharger Support ]
IV - => [ Charge Air Regulation Vacuum Diaphragm ]
Recirculation and Wastegate Bypass Regulation Valves
1 Turbocharger
• Can be replaced only with the exhaust manifold.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
• Removing and installing, refer to => [ Turbocharger ] Turbocharger.
2 Connecting Hose
• Make sure it is secure.
3 Charge Air Regulation Vacuum Diaphragm
• Checking, refer to => [ Charge Air Regulation Vacuum Diaphragm, Checking ] Charge Air Regulation Vacuum Diaphragm, Checking.
• Removing and installing, refer to => [ Charge Air Regulation Vacuum Diaphragm ] Service and Repair.
4 Connecting Hose
• Make sure it is secure.
5 Connecting Hose
• Make sure it is secure.
6 Bolt
• 3 Nm
7 Wastegate Bypass Regulator Valve (N75)
8 Connecting Hose
• Make sure it is secure.
9 Connection
10 Clip
11 Bolt
• 9 Nm
12 Seal
13 Turbocharger Recirculation Valve (N249)
• Note the installed position, refer to => [ Turbocharger Recirculation Valve Installed Position ].
14 Bolt
• 7 Nm
15 Seal
Turbocharger Recirculation Valve Installed Position
- Note the installed position - arrows -.
Coolant Supply, Oil Supply and Oil Return Line
1 Seal
• Always replace.
2 Banjo Bolt
• 33 Nm
3 Oil Supply Line
4 Turbocharger
• Can only be replaced with the exhaust manifold.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
• Removing and installing, refer to => [ Turbocharger ] Turbocharger.
5 Bolt
• 9 Nm
6 Bolt
• 9 Nm
7 Seal
• Always replace.
8 Banjo Bolt
• 38 Nm
9 Bolt
• 9 Nm
10 Banjo Bolt
• 38 Nm
11 Seal
• Always replace.
12 Coolant Supply Line
13 O-ring
• Always replace.
14 Bolt
• 9 Nm
15 Gasket
• Always replace.
16 Oil Return Line
17 Bolt
• 9 Nm
18 Gasket
• Always replace.
Coolant Return and Turbocharger Support
1 Gasket
• Always replace.
2 Nut
• Always replace.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
• Tightening sequence and specification; refer to => [ Turbocharger Nut Tightening Sequence and Specification ].
3 Banjo Bolt
• 38 Nm
4 Seal
• Always replace
5 Coolant Return Line
6 Bolt
• 9 Nm
7 Turbocharger
• Can only be replaced with the exhaust manifold.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
• Removing and installing, refer to => [ Turbocharger ] Turbocharger.
8 Turbocharger Support
9 Bolt
• 30 Nm
• Lubricate the bolts with hot bolt paste. Refer to the Parts Catalog.
10 Bolt
• 30 Nm
• Lubricate the bolts with hot bolt paste. Refer to the Parts Catalog.
11 Nut
• 30 Nm
• Do not loosen to remove the turbocharger.
• Always replace.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
12 Fastening Strip
Turbocharger Nut Tightening Sequence and Specification
Special tools, testers and auxiliary items required
• Torque wrench (5-50 Nm) (V.A.G 1331)
• Torque Wrench (V.A.G 1783)
Procedure
- Tighten the nuts in 4 passes in sequence - 1 through 5 - as follows:
- Tighten the nuts to 5 Nm
- Tighten the nuts to 12 Nm
- Tighten the nuts to 16 Nm
- Tighten the nuts to 25 Nm
Charge Air Regulation Vacuum Diaphragm
1 Turbocharger
• Can only be replaced with the exhaust manifold.
• Lubricate the stud bolts on the exhaust manifold with hot bolt paste. Refer to the Parts Catalog.
• Removing and installing, refer to => [ Turbocharger ] Turbocharger.
2 Charge Air Regulation Vacuum Diaphragm
• Checking, refer to => [ Charge Air Regulation Vacuum Diaphragm, Checking ] Charge Air Regulation Vacuum Diaphragm, Checking.
• Removing and installing, refer to => [ Charge Air Regulation Vacuum Diaphragm ] Service and Repair.
3 Bolt
• 10 Nm
4 Circlip