torque AUDI A6 1997 C5 / 2.G AEB ATW Engines Turbocharger System Workshop Manual

21-14

Charge pressure leak test with VAG
1687


Intake system, checking for leaks using VAG
1687 Diagnostic Tool
Diagnostic trouble codes (DTCs) related to fuel
trim, charge pressure or mass air flow (MAF)
may be caused by:

Leaking (worn/torn) intake hoses during charge
conditions
Incorrectly torqued or improperly placed clamps
on intake hoses etc. causing leaks during
charge conditions

Check the charge air pressure system using the VAG 1687 Charge air
system tester.
Special tool VAG 1687 Charge air system tester preliminary set-up

- Back off pressure regulator knob -2- of VAG 1687 fully to protect gauge
when shop air supply is applied to assembly.
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.GE02.21.1

21-25


CAUTION!
Part numbers are listed here for reference only.
Always check with your Parts department for
the latest information. 7 -
Bolt
20 Nm (15 ft lb)
8 -
Oil supply line Tightening torque for union nut: 25 Nm (18
ft lb) From oil filter bracket item - 1 -, page
Page 17
-6
9 -
Heat shield
10 -
Exhaust manifold
11 -
Bolt
Always replace35 Nm (26 ft lb)Coat thread and bolt head seating surface
with "G 052 112 A3" hot bolt paste.
12 -
Bolt 10 Nm (7 ft lb)
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
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21-26


13 -
Gasket
Always replaceNote installed position
14 -
Coolant return line Union nut tightening torque: 30 Nm (22 ft
lb)
15 -
Nut Always replace25 Nm (18 ft lb)
16 -
Gasket Always replaceNote installed position
17 -
Banjo bolt 25 Nm (18 ft lb)
18 -
Coolant supply line
19 -
Fuse
20 -
Vacuum diaphragm For wastegate
21 -
Bolt 10 Nm (7 ft lb)
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11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE02.21.1

- Loosely bolt coolant supply line to vacuum
diaphragm for charge air pressure regulation
valve.

- Tighten banjo fitting, then tighten mounting
bolt for bracket to proper torque.
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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21-34

Tightening torques

Component
Tightening
torques
Oil return line to turbocharger 10 Nm (7 ft
lb)
Turbocharger bracket to
turbocharger (bolt and washer
assembly M8)
1) 40 Nm (30 ft
lb)
Turbocharger bracket to cylinder
block 45 Nm (33 ft
lb)
Oil feed line to turbocharger 25 Nm (18 ft
lb)
Coolant supply pipe bracket to
turbocharger 10 Nm (7 ft
lb)
Oil supply line bracket to cylinder
head 20 Nm (15 ft
lb)
Coolant supply line to
turbocharger 25 Nm (18 ft
lb)
Crankcase ventilation line to
cylinder head 10 Nm (7 ft
lb)
Coolant return line to
turbocharger 30 Nm (22 ft
lb)
Turbocharger to exhaust
manifold 35 Nm (26 ft
lb)
Three Way Catalytic Converter 30 Nm (22 ft
Pa
ge 46 of 50 Turbochar
ger s
ystem
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.21.1