Replace fastener(s).
Coat the thread on the nut with hot bolt paste. For the correct hot bolt paste, refer to
the Electronic Parts Catalog (ETKA).

38

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September 2013

Right Exhaust Manifold Tightening Specifications

Step
1

1)

Nm
Hand-tighten

2

Tighten bolts 1 through 9 in sequence

15

3

Tighten bolts 1 through 9 in sequence

25

Replace fastener(s).
Coat the thread on the nut with hot bolt paste. For the correct hot bolt paste, refer to
the Electronic Parts Catalog (ETKA).

Engine – 3.0L
CTUA (TFSI)

2)

Component
Tighten bolts 1 through 9 in sequence 1) 2)

Audi A7 Reference Specification Book

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September 2013

39

Multiport Fuel Injection – 3.0L CTUA
Technical Data
3.0L TFSI Engine
Engine idle speed
Fuel pressure before high
pressure pump
Fuel pressure after high pressure
pump

Cannot be adjusted, it is regulated by
idle stabilization
3.0 to 6.0 bar pressure
30 to 125 bar pressure

Fastener Tightening Specifications
Component
Air duct
Camshaft Position (CMP) sensor
Fuel pressure sensor 1)
Fuel rail bracket 2)
High-pressure line 3)
High Pressure Pump

Nm
1.5
9
22
2.5
25
Hand-tighten
20
10

Intake Air Temperature (IAT) sensor (G42)/Manifold
Absolute Pressure (MAP) sensor (G71)
Intake manifold runner position sensor 2
Low fuel pressure sensor
Oxygen Sensor (O2S)
High-pressure line bracket
High-pressure line protective plate nut
High-pressure line protective plate threaded pin
High-pressure line threaded connection
Screw-type clamps 9 mm wide
Screw-type clamps 13 mm wide
Threaded connection-to-high pressure pump
Throttle Valve Control Module 4)
1)
2)

3)
4)

2.5
15
55
9
9
9
40
3.4
5.5
27
10

Oil the threads.
For bolt tightening clarification, ElsaWeb, Intake Manifold Lower Section, Fuel Rail
and Fuel Injector Overview, items 10, 11 and 12.
Coat the threads on the union nut with fuel.
In a diagonal sequence

40

Audi A7 Reference Specification Book

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September 2013

Lower Intake Manifold Tightening Specification

Nm
9

Engine – 3.0L
CTUA (TFSI)

Component
Tighten bolts and nuts (Æ) diagonally in stages

Audi A7 Reference Specification Book

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September 2013

41

Control Valve Control Module
Tightening Specifications

Step
1
2
3

42

Bolts
5, 6
6
5

Nm
Hand-tighten
10
10

Audi A7 Reference Specification Book

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September 2013

Ignition – 3.0L CTUA
Ignition Technical Data
3.0L TFSI Engine
Engine idle speed
Ignition timing
Ignition/Glow Plug System

Spark plugs Names
Tightening
specifications
Ignition sequence

Cannot be adjusted, it is regulated by idle
stabilization
Not adjustable, regulated by the Engine
Control Module (ECM)
Single coil ignition system with 6 ignition
coils (output stages integrated) that are
connected directly to spark plugs via the
ignition cables.
Refer to data sheets for exhaust emission
test.
Maintenance Procedures Rep. Gr. 03
1-4-3-6-2-5

Fastener Tightening Specifications
Nm
9
9
25
5

Engine – 3.0L
CTUA (TFSI)

Component
Camshaft Position (CMP) sensor
Engine speed sensor
Knock Sensor (KS)
Wiring harness

Audi A7 Reference Specification Book

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September 2013

43

Engine Mechanical – 4.0L
CEUC, CRDB
General, Technical Data
Engine Number Location

The engine number -arrow B- is visible, if the housing for the charge
air cooler is removed. The first 3 digits of the engine code -arrow
A- are visible, when the engine cover is removed. The engine serial
number (“engine code“ and “serial number“) is located on the front of
the cylinder block on the left side -arrow B-. The first 3 digits of the
engine code stand for displacement and the mechanical structure
of the engine. They are stamped in the cylinder block, including
the serial number. The fourth digit describes the engine output
and torque and depends on the Engine Control Module (ECM).

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Audi A7 Reference Specification Book

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September 2013

Torque
Bore

liter
kW at
RPM
Nm at
RPM
diameter
mm
mm

Stroke
Compression ratio
RON
at least
Fuel injection and ignition
system
Ignition sequence
Exhaust Gas Recirculation
(EGR)
Turbocharger, Supercharger
Knock control
Charge air cooler
Oxygen Sensor (O2S) regulation

Variable valve timing
Variable intake manifold
Secondary Air Injection (AIR)
system
Valve per cylinder
1)

Engine –
4.0L CEUC, CRDB

Engine Data
Code letters
Displacement
Output

CEUC
3.999
309 @ 5000 to
6400
550 @ 1400 to
5200
84.5

CRDB
3.999
412 @ 5700 to
6600
700 @ 11750 to
5500
84.5

89.0
10.1
98 1)
Bosch Motronic

89.0
9.3
98 1)
Bosch Motronic

1-5-4-8-6-3-7-2
No

1-5-4-8-6-3-7-2
No

2 turbocharger
4 sensors
Yes
2 sensors before
catalytic converter
2 sensors after
catalytic converter
Intake / Exhaust
Yes
Yes

2 turbocharger
4 sensors
Yes
2 sensors before
catalytic converter
2 sensors after
catalytic converter
Intake / Exhaust
Yes
Yes

4

4

Unleaded RON 95 is also permitted but performance is reduced.

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September 2013

45

Engine Assembly – 4.0L CEUC, CRDB
Fastener Tightening Specifications
Component
Bolts and nuts

Engine bracket-to-engine
Engine mount-to-engine support 1)
Engine support-to-engine
Subframe mount sensor and subframe
mount actuator to engine mount bolt
Subframe-to-engine bracket
1)

Fastener
size
M6
M7
M8
M10
M12
-

Nm

-

9
15
20
40
65
20
90 plus an
additional 90°
(¼ turn)
60
6

-

55

Replace fastener(s).

46

Audi A7 Reference Specification Book

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September 2013

Engine –
4.0L CEUC, CRDB

Crankshaft, Cylinder Block – 4.0L CEUC,
CRDB
Allocation of Crankshaft Bearing
Shells for Guide Frame

Bearing shells with the correct thickness are allocated to the
guide frame in the factory. Colored dots on sides of bearing
shells serve for identifying bearing shell thickness. The allocation
of bearing shells to guide frame is identified by a letter on the
front crankshaft flange, as shown in the illustration. The letter
series begins with crankshaft bearing “5“ (transmission side)
and ends with crankshaft bearing “1“ (belt pulley side).
Letter on guide frame
R
S
G
U
B
Audi A7 Reference Specification Book

Color of bearing
Red
Black
Yellow
Green
Blue
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September 2013

47

Allocation of Crankshaft Bearing
Shells for Guide Frame

Bearing shells with the correct thickness are allocated to the cylinder
block in the factory. Colored dots on sides of bearing shells serve
for identifying bearing shell thickness. Allocation of bearing shells to
cylinder block is marked by one letter each at left front on cylinder
block (can be read from outside) as shown in the illustration.
Letter on guide frame
R
S
G
U
B

48

Color of bearing
Red
Black
Yellow
Green
Blue

Audi A7 Reference Specification Book

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September 2013

Drive plate crankshaft 1)
Idler roller for the ribbed belt-to-engine
Oil spray jet
Tensioner for the ribbed belt-to-engine 2)

Nm
50 plus an
additional 90°
(¼ turn)
60 plus an
additional 90°
(¼ turn)
22
9
22
55

1)
2)

Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Ribbed Belt Drive Overview,
items 1 and 2.

Vibration Damper, Tightening Specification

Step
1
2
3

Bolts
Arrow
Arrow
Arrow

Tightening Specification/Additional Turn
15 Nm in a diagonal sequence
22 Nm in a diagonal sequence
In a diagonal sequence, turn an additional 90°

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September 2013

49

Engine –
4.0L CEUC, CRDB

Fastener Tightening Specifications
Component
Connecting rod bearing cap -o-connecting rod 1)

Baffle Plate Tightening Specification

Step
1
2

50

Component
Tighten bolts 1 through 6 in sequence
Tighten bolts 1 through 6 in sequence

Audi A7 Reference Specification Book

Nm
5
an additional
90° (¼ turn)

•

September 2013

Step
1
2
3
4
5
6
7

Bolts
1 through 10
11 through 20
1 through 10
1 through 10
11 through 20
11 through 20
Without numbering in
the illustration

Audi A7 Reference Specification Book

Engine –
4.0L CEUC, CRDB

Guide Frame Tightening Specifications

Nm
30
30
50
an additional 90° (¼ turn)
50
an additional 90° (¼ turn)
9 Nm in a diagonal sequence

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September 2013

51

Spur Gear Unit Tightening Specifications

Tighten the bolts diagonally in the sequence -1 to 5- to 22 Nm.