13

Engine Mechanical – 3.0L CTUA
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.

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Audi A7 Reference Specification Book

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September 2013

Engine Data
Code letters
Displacement
liter
Output
kW at RPM
Torque
Nm at RPM
Bore
diameter mm
Stroke
mm
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

4

Unleaded RON 91 is also permitted but performance is reduced.

Engine – 3.0L
CTUA (TFSI)

1)

CTUA
2.995
228 @ 5500 to 6500
440 @ 2900 to 4500
84.5
89.0
10.5
95 1)
Simos
1-4-3-6-2-5
No
Supercharger
2 sensors
Yes
2 sensors before catalytic converter
2 sensors after catalytic converter
Intake
No
Yes

Audi A7 Reference Specification Book

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September 2013

15

Engine Assembly – 3.0L CTUA
Fastener Tightening Specifications
Component

Fastener
size
M6
M7
M8
M10
M12
-

Bolts and nuts

Engine mount 1)
Engine mount plate
Engine support 2)
Heat shield
Engine mount plate
Subframe
1)
2)

Nm
9
15
20
40
65
90 plus an
additional 90°
(¼ turn)
20
20
40
10
20
55

-

Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Subframe Mount Overview, items
4 and 5.

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Audi A7 Reference Specification Book

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September 2013

Crankshaft, Cylinder Block – 3.0L CTUA
Allocation of Crankshaft Bearing
Shells for Cylinder Block

Bearing shells with the correct thickness are allocated to the
cylinder block in the factory. Colored dots on the sides of the
bearing shells identify the bearing shell thickness. Allocation
of the bearing shells to the cylinder block is marked by a
letter on the respective bearing on the guide frame.

Audi A7 Reference Specification Book

Color of bearing
Red
Yellow
Blue
Black

•

September 2013

Engine – 3.0L
CTUA (TFSI)

Letter on guide frame
R
G
B
S

17

Allocation of Crankshaft Bearing
Shells for Guide Frame

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

18

Color of bearing
Red
Yellow
Blue
Black

Audi A7 Reference Specification Book

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September 2013

Fastener Tightening Specifications
Component
Connecting rod 1) 5)

Nm
50 plus an
additional 90°
(¼ turn)
60 plus an
additional 90°
(¼ turn)
9
9
9
42
40
40
20 plus an
additional 90°
(¼ turn)

Drive plate 1)
Locking bolt
Oil pressure regulation valve
Piston cooling oil spray jet 4)
Ribbed belt idler roller 3)
Ribbed belt idler roller 2)
Ribbed belt tensioning damper
Vibration damper 1)

1)
2)

3)

4)

Engine – 3.0L
CTUA (TFSI)

5)

Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Ribbed Belt Drive Overview,
item 4.
For bolt tightening clarification, refer to ElsaWeb, Supercharger Ribbed Belt Drive
Overview, item 6.
Insert the bolt with locking compound
Lubricate the thread and contact surface.

Audi A7 Reference Specification Book

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September 2013

19

Ribbed Belt Sealing Flange Tightening Specification

Component
Tighten bolts (Æ) in a diagonal sequence

20

Audi A7 Reference Specification Book

Nm
9

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September 2013

Guide Frame Tightening Specifications

2
3

Component
Replace and tighten bolts 1 through 16 in
sequence
Tighten bolts 1 through 16 in sequence
Replace and tighten bolts 17 through 31 in
sequence (for guide frame sealing surfaces on
cylinder block)

Audi A7 Reference Specification Book

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September 2013

Nm
50
an additional
90° (¼ turn)
23

Engine – 3.0L
CTUA (TFSI)

Step
1

21

Crankshaft Dimensions
Honing dimension
in mm
Basic dimension

Crankshaft bearing pin
diameter
65.000
-0.022
-0.042

Crankshaft connecting
rod journal diameter
56.000
-0.022
-0.042

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

New

Wear limit

0.20 to 0.30
0.50 to 0.70
0.25 to 0.50

0.80
0.80
– 1)

Data not available. Refer to ElsaWeb for the current oil scraping ring wear limit.

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

New

Wear limit

0.04 to 0.08
0.03 to 0.07
0.02 to 0.06

0.20
0.20
0.15

Piston and Cylinder Dimensions
Honing dimension
in mm
Basic dimension
1)

2)

Piston diameter

Cylinder bore diameter

84.49 1)

84.51 2)

Dimension without graphite coating (thickness 0.02 mm). The graphite coating
wears away.
Measure 50 mm inside the cylinder bore.

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Audi A7 Reference Specification Book

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September 2013

Cylinder Head, Valvetrain – 3.0L CTUA
Fastener Tightening Specifications

Bearing plate for drive sprocket
Bearing plate for right camshaft timing chain drive
sprocket 1)
Camshaft adjuster for intake camshaft 1)
Camshaft adjustment solenoid valve
Camshaft chain sprocket for exhaust camshaft 1)
Chain tensioner with glide track 1)
Chain tensioner for left camshaft control chain
Chain tensioner for right camshaft timing chain
Drive sprocket for oil pump 1)
Drive sprocket for right timing chain 1)

Drive train chain tensioner for timing mechanism
Gear carrier to balance shaft
Glide track, bolt 1)
Guide rail bolt 1)
Mounting pin for drive sprocket bolt 2)

Audi A7 Reference Specification Book

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September 2013

Nm
60
60
15 plus an
additional 90°
(¼ turn)
8 plus an
additional 45°
(⅛ turn)
8 plus an
additional 45°
(⅛ turn)
80 plus an
additional 90°
(¼ turn)
5
80 plus an
additional 90°
(¼ turn)
10 plus an
additional 45°
(⅛ turn)
9
9
30 plus an
additional 90°
(¼ turn)
30 plus an
additional 90°
(¼ turn)
9
13
10 plus an
additional 90°
(¼ turn)
10 plus an
additional 90°
(¼ turn)
30 plus an
additional 90°
(¼ turn)

23

Engine – 3.0L
CTUA (TFSI)

Component
Balance shaft transmission side to balance shaft
Balance shaft belt pulley side to Balance shaft
Balance shaft chain sprocket 1)

Fastener Tightening Specifications (cont’d)
Component
Mounting pin for drive sprocket bolt 3)

Nm
5 plus an
additional 60°
turn
9

Oil dipstick guide tube
1)
2)

3)

Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, and see item 15.
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, and see item 3.

Compression Checking Specifications
Compression pressure
New
Wear limit
Maximum difference between cylinders

Bar pressure
11.0 to 14.0
10.0
30

Valve Dimensions

Dimension

Intake valve

Exhaust valve

Diameter a
Diameter b
c

mm
mm
mm

33.85 ± 0.10
5.98 ± 0.01
104.0 ± 0.2

28.0 ± 0.1
5.96 ± 0.01
101.9 ± 0.2

α

∠°

45

45

NOTE: Intake and exhaust valves must not be
refaced by grinding. Only lapping is permitted.
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Audi A7 Reference Specification Book

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September 2013

Left Timing Chain Cover Tightening Specifications

1)

Step
1

Component
Tighten bolts 1 through 8 in sequence

Nm
5

2

Tighten bolts 1 through 8 in sequence

an additional
90° (¼ turn)

Replace fastener(s).

Engine – 3.0L
CTUA (TFSI)

NOTE: Brackets A and B are connected with the timing chain cover.

Audi A7 Reference Specification Book

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September 2013

25

Right Timing Chain Cover Tightening Specifications

Step
1
2
1)

Component
Replace and tighten bolts 1 through 8 in
sequence
Tighten bolts 1 through 8 in sequence

Nm
5