Component
Bracket for electric connector and engine cover-toturbocharger
Bracket for turbocharger
- Stud bolt 2)
- Bolt 1)
Charge air pressure sensor/intake air temperature
sensor-to-connection
Clamp 9 mm wide
Clamp 13 mm wide
Connection for air guide hose-to-turbocharger
Connection-to-charge air cooler
Right air duct pipe
Sleeve-to-air duct pipe in the center
Sleeve-to-lower air duct pipe
1)

10
23
9
3
5.5
9
9
9
5.5
9

Tighten lastly in diagonal sequence and in stages
Replace nuts after each time they are loosened

Engine –
3.0L CNRB (TDI)

2)

Nm
9

Audi Q7 Quick Reference Specification Book

•

September 2013

43

Turbocharger Tightening Specifications

Replace stud bolts and nuts
Step
1
2
3

44

Component
Stud bolts for the nuts 1, 2
1, 2
1, 2

Nm
10
Hand-tighten
9

4

1, 2

5

3, 4, 5

an additional
90° (¼ turn)
Hand-tighten

6

3, 4

9

7

5

23

Audi Q7 Quick Reference Specification Book

•

September 2013

Exhaust System – 3.0L CNRB (TDI)
Fastener Tightening Specifications

Particle sensor 1)
Primary catalytic converter to bracket for the preliminary
catalytic converter
Reducing agent metering system control module nut-tobracket
Reducing agent metering system pressure sensor
-G686- version 1
Reducing agent metering system pressure sensor
-G686- version 2
Reducing agent pump to active tank
Reducing agent tank cap switch
Reducing agent transfer pump-to-passive tank
Suspended mount-to-body
Tail pipe-to-rear muffler
Underbody protection lock washer-to-passive tank
1)
2)
3)

Nm
9
8
23
23
2
5
9
9
45
25
30 + 90°
23
9
35
60
50
23
2
8
1.5
1.8
0.6
1.8
23
60
1.5

Coat the thread with hot bolt paste
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Reducing Agent Tank Overview,
items 3, 5 and 14.

Audi Q7 Quick Reference Specification Book

•

September 2013

45

Engine –
3.0L CNRB (TDI)

Component
Active tank to body
Bleeder screw
Bracket for the preliminary catalytic converter-to-body
Bracket for the preliminary catalytic converter-toparticulate filter nut 1)
Bracket for reducing agent metering system control
module nut-to-body
Clamp-to-SCR - catalytic converter
Exhaust gas recirculation cooler-to-engine
Exhaust gas recirculation motor-to-connection
Exhaust gas temperature sensor 1)
Exhaust manifold-to-engine nut 1)
Exhaust manifold-to-primary catalytic converter 1) 2)
Exhaust pressure sensor
Engine temperature control sensor-to-connection
Mounting straps-to-body 3)

Exhaust Manifold Tightening Specifications

Replace nuts. Coat the nut thread with hot bolt
paste. Refer to the Parts Catalog.
Step
1
2
3

46

Component
Tighten nuts 1 through 9 in sequence
Tighten nuts 1 through 9 in sequence
Tighten nuts 1 through 9 in sequence

Audi Q7 Quick Reference Specification Book

Nm
Hand-tighten
15
25

•

September 2013

EGR Pipe at the Intake Manifold
Tightening Specifications

Coat the screw thread with hot bolt past. Refer to the Parts Catalog.
Step
1
2
3

Nm
Hand-tighten
2.5
9

2, 3

an additional
90° (¼ turn)

Engine –
3.0L CNRB (TDI)

4

Bolts/screw-type clamps
1, 2
3
1, 2

Audi Q7 Quick Reference Specification Book

•

September 2013

47

EGR Pipe at the Turbocharger
Tightening Specifications

Coat the screw thread with hot bolt past. Refer to the Parts Catalog.
Step
1
2
3

Bolts/screw-type clamps
2, 3
1
2, 3

Nm
Hand-tighten
6
5

4

2, 3

an additional 90° (¼ turn)

48

Audi Q7 Quick Reference Specification Book

•

September 2013

Diesel Fuel Injection – 3.0L CNRB (TDI)
Fastener Tightening Specifications

1)
2)

Nm
9
4
5
9
2.5
9
3.5
45
70
22
2
2.5
9
25
22
25
9
10
1.5
1.5
2.5
50
3.5
9
45
50

Engine –
3.0L CNRB (TDI)

Component
Bracket for the air guide pipe-to-air guide pipe bolt
Bracket for the electrical connector to Intake Manifold
bolt
Charge air pressure sensor / intake air temperature
sensor bolt
Clamp for high pressure line
Counter Pin
- On camshaft bearing
- On cylinder head
Differential pressure sensor nut
Exhaust gas temperature sensor 2)
Engine support adapter to high pressure pump nut
Fuel rail bolt
Fuel temperature sensor
Guide pin
- On camshaft bearing
- On cylinder head
High pressure line union nut 1)
High pressure pump bolt
Hose connection ring-to-fuel rail banjo bolt
Intake flap motor-to-bracket exhaust gas recirculation
cooler switch-over valve bolt
Lower Air Filter Housing bolt
Mass airflow sensor-to-upper air filter housing bolt
Mounting pins for engine cover
NOx sensor nut
Particulate sensor 2)
Particulate sensor-to-CR - catalytic converter nut
Pipe for Exhaust Gas Recirculation (EGR) system-to-air
guide pipe bolt
Pressure line to particulate filter
Oxygen sensor
Tensioning claw bolt
- First tightening
- Second tightening
Wiring guide-to-intake manifold bolt

6
90° (¼ turn)
4

Coat the union nut threads with clean engine oil
Coat with hot bolt paste.

Audi Q7 Quick Reference Specification Book

•

September 2013

49

Fuel Pressure Regulator Valve
Tightening Specifications
Step
1
2
3
4

Nm
Hand-tighten
60
Turn back 180°
85

Fuel Pressure Sensor Tightening Specifications
Step
1
2
3
4

Nm
Hand-tighten
60
Turn back 180°
85

Intake Manifold Tightening Specifications

Step
1
2
3

50

Component
Tighten bolts 1 through 4 in sequence and
arrows
Tighten bolts 1 through 4 in sequence
Tighten arrows in any sequence

Audi Q7 Quick Reference Specification Book

Nm
Hand-tighten
5
9

•

September 2013

Ignition/Glow Plug System – 3.0L CNRB
(TDI)
Fastener Tightening Specifications
Nm
9
9
12

Engine –
3.0L CNRB (TDI)

Component
Camshaft position sensor bolt
Engine speed sensor bolt
Glow plug

Audi Q7 Quick Reference Specification Book

•

September 2013

51

Engine Mechanical – 3.0L
CTWA, CTWB
General, Technical Data
Engine Number Location

The engine number (engine code and serial number) is
located on the top front of the cylinder block, below the
right cylinder head (Æ). Engine codes beginning with C are
four-digit. The first 3 digits of the engine code indicate the
displacement and the mechanical structure of the engine.
The fourth digit describes the engine output and torque.

52

Audi Q7 Quick Reference Specification Book

•

September 2013

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

CTWB
2.995
206 @ 4900-6500
400 @ 1500-4900
84.5
89.0
10.5
98 1)

CTWA
2.995
245 @ 5500-6500
440 @ 2900-5300
84.5
89.0
10.5
98 1)

Simos

Simos

1-4-3-6-2-5
no

1-4-3-6-2-5
no

Supercharger
2 sensors
Yes
2 sensors before
catalytic converter
2 sensors after
catalytic converter
Intake
No
Yes

Supercharger
2 sensors
Yes
2 sensors before
catalytic converter
2 sensors after
catalytic converter
Intake
No
Yes

4

4

Unleaded RON 95 is permitted but performance is reduced.

Audi Q7 Quick Reference Specification Book

•

September 2013

53

Engine – 3.0L
CTWA, CTWB

Engine Data
Engine code
Displacement
liter
Output
kW at RPM
Torque
Nm at RPM
Bore
dia. mm
Stroke
mm
Compression ratio
Research Octane
minimum
Number (RON)
Fuel injection system and
ignition system
Ignition sequence
Exhaust Gas Recirculation
(EGR)
Turbocharger, Supercharger
Knock Sensor (KS)
Charge Air Cooler (CAC)
Oxygen Sensor (O2S) regulation

Engine Assembly – 3.0L CTWA, CTWB
Fastener Tightening Specifications
Component
Bolts and nuts

Engine carrier-to-body bolt 1)
Engine mount, left
Engine mount, right
Ground connection on the right longitudinal
member
Left engine support
- Bolt
- Nut
Right engine support
- Bolt
- Nut
1)