NHTSA ID Number: 10203510
Manufacturer Communication Number: QRSB AUDI
A6 S6
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
1 to 3
Install all the way in by hand.
2
1 to 3
8 Nm
3
1 to 3
Tighten 90° additional turn
Audi A6/S6 Quick Reference Specification Book
•
September 2013
129
Cooling System – 3.0L CPNB (TDI)
Fastener Tightening Specifications
Component
Bracket for coolant auxiliary cooler bolt
- Bolt
- Nut
Bracket to coolant auxiliary cooler bolt
Check valve bolt
Coolant connection bolt
Coolant fan control module to fan shroud bolt
Coolant pipes 2)
- Bolt
- Banjo Bolt
Coolant pump to engine bolt 1)
Nm
20
8
3.5
9
9
2.5
9
12
3 plus an
additional 90°
(¼ turn)
23
9
9
9
5
9
Coolant pump ribbed belt pulley to coolant pump bolt
Coolant shut-off valve to mounting plate bolt
Engine coolant temperature sensor bolt
Engine temperature control sensor bolt
Fan shroud to coolant fan bolt
Front coolant pipe bolt
Left rear coolant pipe bolt 3)
- Bolt
- Bolt
Radiator bracket 4)
- Bolt
- Bolt
Upper coolant pipe bolt
1)
2)
3)
4)
9
20
4.5
5
9
Tighten diagonally in steps
For bolt tightening clarification, refer to ElsaWeb, Coolant Pipes Overview, items 13,
15 and 16.
For bolt tightening clarification, refer to ElsaWeb, Coolant Pipes Overview, items 22
and 24.
For bolt tightening clarification, refer to ElsaWeb, Radiator Overview items 18 and
20.
130
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Fuel Supply – 3.0L CPNB (TDI)
Fastener Tightening Specifications
Component
Accelerator pedal module to bracket bolt
Fuel filter bracket nut
Fuel filler neck to fender bolt
Fuel pump control module bolt
Heat shield to fuel tank bolt
Locking flange cover screw
Locking ring
Mounting strap to body bolt
Reducing agent filler tube bolt
Nm
8
2.1
20
1.6
2
1.5
110
20
2.5
Engine –
3.0L TDI CPNB
Turbocharger, G-Charger – 3.0L CPNB
(TDI)
Fastener Tightening Specifications
Component
Bracket for connector and engine cover to turbocharger
Bracket for turbocharger bolt 1)
Bracket for turbocharger stud bolt 2)
Charge air cooler
Charge air pressure sensor/intake air temperature
sensor bolt
Clamp 13 mm wide
Clamp 9 mm wide
Connection to turbocharger bolt
Right air guide pipe bolt
1)
2)
Nm
9
23
10
7
5
5.5
3.4
9
9
Tighten last to 23 Nm diagonally and in steps.
Replace nuts after each time they are loosened.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
131
Turbocharger - Tightening
Specification and Sequence
Tighten the bolts and nuts in seven steps in the sequence shown.
Replace the stud bolts and nuts.
Step
Bolts
1
10 Nm
2
Stud bolts for
the nuts -1,
and 21 and 2
3
1 and 2
9 Nm
4
1 and 2
Tighten 90° additional turn
5
3, 4 and 5
6
3 and 4
9 Nm
7
56
23 Nm
132
Tightening specification/additional turn
Install all the way in by hand.
Install all the way in by hand.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Exhaust System, Emission Controls – 3.0L
CPNB (TDI)
Fastener Tightening Specifications
NOx sensor control module 2 with NOx sensor 2
- Bolt
- Nut
Particulate filter with catalytic converter nut 1) 2)
Particulate sensor
- Bolt
- Nut
Pressure line for the differential pressure sensor
Pressure pipe for differential pressure sensor
Reducing agent metering system control module to base
plate bolt
Suspended mount bolt
Selective Catalytic Reduction (SCR) - catalytic converter
to front exhaust pipe nut
Tank For the reducing agent bolt
1)
2)
Nm
5
23
23
9
2
9
9
35
45
9
30 plus an
additional 90°
(¼ turn)
50
2
23
45
2
45
45
4.5
23
23
20
Replace fastener(s).
Coat the thread with hot bolt paste.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
133
Engine –
3.0L TDI CPNB
Component
Clamp for front exhaust pipe to reducing agent injector
bolt
Clamping sleeve nut
Connection to EGR cooler bolt
Coolant connection bolt
Cover for the reducing agent tank to tank
EGR cooler bolt
EGR motor to connection bolt
EGR temperature sensor
- Aluminum exhaust gas recirculation radiator bolt
- Steel exhaust gas recirculation radiator bolt
Engine coolant temperature sensor bolt
Exhaust manifold bolt 1) 2)
Exhaust Manifold - Tightening
Specification and Sequence
Replace the nuts. Coat the thread on the nut with hot bolt paste.
Refer to the Parts Catalog. Tighten the nuts in 3 steps according to
the tightening sequence:
Step
Bolts
1
2
Stud bolts for
the nuts -1,
and 21 and 2
3
1 and 2
134
Tightening specification
Install all the way in by hand.
15 Nm
25 Nm
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Replace the nuts. Coat the thread on the nut with hot bolt paste.
Refer to the Parts Catalog. Tighten the nuts in 3 steps according to
the tightening sequence:
Step
Tightening specification
1
2 and 3
2
1
3
2 and 3
Turn them by hand until the bolt heads are
touching
Position using the tab on the EGR pipe tightening
specification.
• Part number 059 131 548 C: 5 Nm
• Part number 059 131 548 D: 3.5 Nm
5 Nm
4
2 and 3
Tighten 90° additional turn
Audi A6/S6 Quick Reference Specification Book
•
September 2013
135
Engine –
3.0L TDI CPNB
EGR Pipe at the Turbocharger - Tightening
Specification and Sequence
Exhaust Gas Recirculation (EGR) Pipe at the Intake
Manifold - Tightening Specification and Sequence
The flange at the EGR pipe must not be wavy or bent. Attach the
EGR pipe with the seals and the screw-type clamps. Coat the thread
on the bolts with hot bolt paste; for the correct hot bolt paste refer to
the Parts Catalog.
Step
1
1 and 2
2
3
3
1 and 2
136
Tightening specification
Turn them by hand until the bolt heads are
touching
Position them as shown in the illustration
2.5 Nm
9 Nm
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Multiport Fuel Injection – 3.0L CPNB (TDI)
Fastener Tightening Specifications
Wiring guide to intake manifold bolt
1)
2)
Nm
70
1.5
9
9
4
9
2.5
9
4.5
22
25
2
25
22
9
5
3.5
2
55
2
9
Engine –
3.0L TDI CPNB
Component
Adapter to high pressure pump bolt
Air guide bolt
Air guide pipe to intake flap motor bolt
Bracket for the air guide pipe bolt
Bracket for the connector to intake manifold bolt
Clamp the high pressure line bolt
Counter pin
- On camshaft bearing
- On cylinder head
Differential pressure sensor
Fuel rail bolt
Fuel return hose to fuel rail banjo bolt
Fuel temperature sensor
High pressure line
High pressure pump bolt
Intake flap motor to intake manifold bolt
Intake manifold mounting pins to cover bolt
Mass airflow sensor bolt
NOx sensor control module with NOx sensor nut
Oxygen sensor 2)
Particle sensor nut
Pipe for the exhaust gas recirculation to air guide pipe
bolt
Pressure line for exhaust pressure sensor 1)
Tensioning Claw 1)
- First tightening
- Second tightening
45
6
Tighten 90°
additional turn
4
Replace
Coat threads with hot bolt paste
Audi A6/S6 Quick Reference Specification Book
•
September 2013
137
Intake Manifold - Tightening
Specification and Sequence
Tighten the bolts in 3 steps as follows:
Step
Bolts
1
1 through 4,
arrows
1 through 4
Install all the way in by hand.
1 through 4
and arrows
9 Nm in any sequence
2
3
138
Tightening specification
5 Nm in sequence shown
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Align the Fuel Pressure Regulator Valve -N276- such that connecting
the harness connector -arrow- does not cause the electrical wiring to
be placed under tension. Counterhold the housing hex bolt to tighten
union nut on regulator valve in four stages as follows:
Step
Tightening specification
1
Install all the way in by hand.
2
60 Nm
3
Turn back 90°
4
85 Nm
Audi A6/S6 Quick Reference Specification Book
•
September 2013
139
Engine –
3.0L TDI CPNB
Fuel Pressure Regulator Valve -N276- Tightening Specification
Fuel Pressure Sensor -G247Tightening Specifications
Tighten the Fuel Pressure Sensor -G247- in four steps:
Step
Tightening specification
1
Install all the way in by hand.
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TSB/Document ID: QRSB AUDI A6 S6
Replacement Service Bulletin Number:
MFR Communication Date: 2013-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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