Yes
Turbocharger
Yes
Yes
Yes
Yes
4
No

Audi Q7 Quick Reference Specification Book

•

September 2013

Engine Assembly – 3.0L CNRB (TDI)
Fastener Tightening Specifications
Component
Bolts and nuts

Bracket for vacuum reservoir-to-engine
support
Bracket-to-vacuum reservoir
Electrohydraulic engine mount solenoid
valve-to-bracket for vacuum reservoir
Engine support-to-subframe 1)

Fastener
size
M6
M7
M8
M10
M12
-

Nm

-

2.5
5

-

10
15
25
40
60
9

Ground wire-to-right engine support

-

120 plus an
additional 180°
(½ turn)
15

Left engine support-to-left engine mount
nut
Left engine support-to-left engine mount
nut
Left engine support-to-subframe

-

75

-

60

-

50 plus an
additional 90°
(¼ turn)

Right engine support
- Bolt

-

- Nut

-

50 plus an
additional 90°
(¼ turn)
75

Replace

Engine –
3.0L CNRB (TDI)

1)

Audi Q7 Quick Reference Specification Book

•

September 2013

17

Engine to Automatic Transmission

Item
1
2
3, 4, 5, 7
6
8, 9, 10
A
1)

18

Bolts
Nm
M10x70 1)
65
M10x70 1)
65
M12x80
80
M12x80
80
M10x70
45
Alignment sleeves for centering

Also secures the starter

Audi Q7 Quick Reference Specification Book

•

September 2013

Crankshaft, Cylinder Block – 3.0L
CNRB (TDI)
Allocation of Crankshaft Bearing
Shells for Cylinder Block

Letter on cylinder block
R
G
B

Audi Q7 Quick Reference Specification Book

Engine –
3.0L CNRB (TDI)

Bearing shells with the correct thickness are allocated to
the cylinder block in the factory. Colored dots on the bearing
shells identify bearing shell thickness. The Æ points to the
belt pulley side. The allocation of the bearing shells to the
cylinder block is identified with a letter by each bearing.
Color of bearing
Red
Yellow
Blue

•

September 2013

19

Allocation of Crankshaft Bearing
Shells for Guide Frame

Bearing shells with the correct thickness are allocated to the
bearing cap at the factory. Colored dots on sides of bearing
shells serve for identifying bearing shell thickness. Allocation of
bearing shells to guide frame is marked on flywheel flange of
crankshaft by a row of letters. The first letter of the row of letters
represents bearing “1” the second letter is for bearing “2”, etc.
Letter on crankshaft
R
G
B

20

Color of bearing
Red
Yellow
Blue

Audi Q7 Quick Reference Specification Book

•

September 2013

Fastener Tightening Specifications
Component
Bracket for the assemblies
Tighten in 2 stages:
• 5 Nm in a diagonal sequence
• 40 Nm in a diagonal sequence
Connecting rod bearing cap-to-connecting rod 1)
2)

Cover for the belt pulley side sealing flange
Drive plate-to-crankshaft 1)

Fastener
Size
-

Generator bracket-to-engine
Tighten in 2 stages:
• 5 Nm in a diagonal sequence
• 40 Nm in a diagonal sequence
Idler roller for the ribbed belt
Idler roller-to-engine
Oil spray jet for piston cooling
Oil temperature sensor 2-to-sealing flange
Ribbed belt tensioner-to-engine 1)

-

Vibration damper-to-crankshaft 1)

-

1)

35 plus an
additional
90° (¼ turn)
9
60 plus an
additional
90° (¼ turn

23
23
9
9
50 plus an
additional
90° (¼ turn)
20 plus an
additional
90° (¼ turn)

Replace fastener(s).
Lubricate the thread and contact surface

Engine –
3.0L CNRB (TDI)

2)

Nm

Audi Q7 Quick Reference Specification Book

•

September 2013

21

Ribbed Belt Pulley Side Sealing
Flange Tightening Specification

Replace the bolts that have been tightened to additional torque.
There is a risk of damaging the aluminum bolts when installing
the sealing flange. Aluminum bolts must not be used to tighten
the sealing flange to the cylinder block. Therefore prepare 3
M6x20 steel bolts to tighten the sealing flange as instructed as
follows. Tighten the bolts in 11 steps in the sequence shown.
Step
1
2
3

22

Bolts
Tighten bolts in a
diagonal sequence
1
2, 3, 4

Nm
Attach the sealing flange with the seal to
the cylinder block
23
M6 x 20 to 9 Nm

Audi Q7 Quick Reference Specification Book

•

September 2013

Ribbed Belt Pulley Side Sealing
Flange Tightening Specification (cont'd)

Bolts

5
6
7

10
1 through 19
1 through 19

8

1 through 19

Nm
Insert a temperature regulator for the
engine oil cooler with the cover
Install all the way in by hand.
3
3 Nm - this measurement accounts for
the seal shrinkage
Tighten an additional turn 90°

Audi Q7 Quick Reference Specification Book

•

September 2013

Engine –
3.0L CNRB (TDI)

Step
4

23

Ribbed Belt Pulley Side Sealing
Flange Tightening Specification (cont'd)

Step
9
10

Bolts
2, 3, 4
2, 3, 4

11

2, 3, 4

24

Nm
Remove the steel bolts M6 x 20
Insert the aluminum bolts and tighten to
3 Nm
Turn the aluminum bolts 90° further

Audi Q7 Quick Reference Specification Book

•

September 2013

Guide Frame Tightening Specifications

Step
1
2
3

Nm
30
50
an additional
180° (½ turn)

Replace fastener(s).

Engine –
3.0L CNRB (TDI)

1)

Component
Tighten bolts 1 through 16 in sequence 1)
Tighten bolts 1 through 16 in sequence
Tighten bolts 1 through 16 in sequence

Audi Q7 Quick Reference Specification Book

•

September 2013

25

Crankshaft Dimensions
Honing dimension
in mm
Basic dimension

Crankshaft bearing pin
diameter
65.00
-0.022
-0.042

Crankshaft connecting
rod journal diameter
60.00
-0.022
-0.042

Piston and Cylinder Dimensions
Honing dimensions
in mm
Basic dimension
Repair stage
1)

2)

Piston diameter

Cylinder bore diameter

82.924 to 82.936 1)
82.964 to 82.976 1)

83.006 to 83.014 2)
83.046 to 83.054 2)

Measurements without graphite coating (thickness = 0.02 mm). The graphite
coating wears off.
Measure 50 mm inside the cylinder bore.

Piston Ring End Gaps
Piston ring
dimensions in mm
1st compression ring
2nd compression ring
Oil scraping ring

New

Wear limit

0.25 to 0.40
0.70 to 0.90
0.25 to 0.50

0.60
1.20
0.70

Piston Ring Clearance
Piston ring
dimensions in mm
1st compression ring
2nd compression ring
Oil scraping ring

26

New

Wear limit

0.09 to 0.130
0.05 to 0.09
0.03 to 0.09

0.160
0.11
0.10

Audi Q7 Quick Reference Specification Book

•

September 2013

Cylinder Head, Valvetrain – 3.0L
CNRB (TDI)
Fastener Tightening Specifications
Component
Balance weight belt pulley side bolt
Balance weight transmission side

Nm
60
30 plus an
additional 90°
(¼ turn)
23
23
5 plus an
additional 90°
(¼ turn
5 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn
23
30 plus an
additional 45°
(⅛ turn)
23
9
9
9

Bracket-to-cylinder head bolt
Camshaft chain sprocket-to-camshaft bolt
Chain tensioner for camshaft timing chain 1)
Chain tensioner with glide track-to-engine 1)
Guide rail guide bolt 1)
Drive sprocket for the balance shaft
Drive sprocket-to-oil pump 1)
Engine lifting eye-to-cylinder head
Gear carrier 2)
Heat shield-to-cylinder head cover
Jump protector-to-crankshaft
1)

Replace fastener(s).
Insert with locking compound.

Engine –
3.0L CNRB (TDI)

2)

Audi Q7 Quick Reference Specification Book

•

September 2013

27

Valve Dimensions

Dimension
Diameter a
mm
Diameter b
mm
c
mm
α
∠°

Intake valve
28.5 to 28.7
5.968 to 5.982
97.2 to 97.4
45° 10’

Exhaust valve
25.9 to 26.1
5.958 to 5.972
99.0 to 99.2
45° 10’