45

Ignition – 4.2L CNDA
Ignition Technical Data
Engine Data
Idle speed
Ignition timing

4.2L/4V FSI Engine
Not adjustable
Not adjustable, regulated by the Engine Control
Module (ECM)
Ignition/glow plug system Single coil ignition system with 8 ignition coils
(output stages integrated) that are connected
directly to spark plugs via the ignition cables
Spark
Names
Data sheets for exhaust emission test
plugs
Tightening
Maintenance Procedures Rep. Gr. 03
specifications
Ignition sequence
1-5-4-8-6-3-7-2

Fastener Tightening Specifications
Component
Camshaft Position (CMP) sensor
Ignition coil electrical wiring-to-cylinder head cover
Knock Sensor (KS)
Spark plugs

46

Nm
10
5
20
30

Audi R8/Spyder Quick Reference Specification Book • September 2013

Engine –
5.2L CTPA, CTYA

Engine Mechanical –
5.2L CTPA, CTYA
General, Technical Data – 5.2L CTPA,
CTYA
Engine Number Location

The engine number (Æ) (engine code and serial number) is
located at the front of the engine on top of the cylinder block.

Audi R8/Spyder Quick Reference Specification Book • September 2013

47

Engine Data
Code Letters
CTPA
Displacement
liter
5.204
Output
kW at RPM
404 @ 8000
Torque
Nm at RPM
540 @ 6500
Bore
diameter mm
84.5
Stroke
mm
92.8
Compression ratio
12.5
RON
at least
98 1)
Injection system/ignition
Bosch Motronic
system
Ignition sequence
1-6-5-10-2-7-3-8-4-9
Turbocharger
Knock control
Oxygen Sensor (O2S)
regulation
Variable valve timing
Variable intake manifold
Secondary Air Injection (AIR)
system
Valve per cylinder
1)

CTYA
5.204
386 @ 8000
530 @ 6500
84.5
92.8
12.5
98 1)
Bosch Motronic

No
4 sensors
2 sensors before
catalytic converter
2 sensors after
catalytic converter
Intake
Exhaust
Yes
Yes

1-6-5-10-2-7-3-84-9
No
4 sensors
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.

48

Audi R8/Spyder Quick Reference Specification Book • September 2013

Fastener Tightening Specifications
Component

Bolts to engine compartment crossmember 1)

Fastener
size
M6
M7
M8
M10
M12
-

Bolts to engine compartment crossmember 4)

-

Clamp to engine compartment crossmember
Engine compartment cross member 1)

-

9
15
20
40
65
20
10 plus an
additional 45°
(⅛ turn)
20
10 plus an
additional 45°
(⅛ turn)
8
8
20
8
8

-

8

-

10
20
40
22
6 plus an
additional 45°
(⅛ turn)
20
40
42
20

Bolts and nuts

Engine compartment trim bracket
Engine cover bracket to engine
compartment crossmember
Engine cover bracket to engine
compartment crossmember
Heat shield
Left engine mount
Left engine support
Oil pump bracket 3)

Right engine mount
Right engine support 2)
Spacer plate to engine compartment
crossmember
1)

2)

3)

4)

-

Nm

For bolt tightening clarification, refer to ElsaWeb, Engine Compartment
Crossmember Overview, items 6, 11, 19 and 21
For bolt tightening clarification, refer to ElsaWeb, Subframe Mount Overview, items
6, 11 and 10.
For bolt tightening clarification, refer to ElsaWeb, Subframe Mount Overview, items
19 and 20.
For bolt tightening clarification, refer to ElsaWeb, Engine Compartment
Crossmember Overview, items 2, 4, 11, 17 and 19.

Audi R8/Spyder Quick Reference Specification Book • September 2013

49

Engine –
5.2L CTPA, CTYA

Engine Assembly – 5.2L CTPA, CTYA

Crankshaft, Cylinder Block – 5.2L
CTPA,CTYA
Allocation of Crankshaft Bearing Shells
for Cylinder Block, New Crankshaft

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 one letter
each at the front left on cylinder block as shown in the illustration.
The bearing identification refers to the first installation during
production: R = red, G = yellow, B = blue. During a second
installation by service, the next thinner bearing shell is installed,
for example, black instead of red, as shown in the following table.
Letter on cylinder block
R
G
B
50

Color of bearing
Black
Red
Yellow

Audi R8/Spyder Quick Reference Specification Book • September 2013

Engine –
5.2L CTPA, CTYA

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 the sides of the bearing shells
identify the bearing shell thickness. Allocation of the bearing shells
to the guide frame is identified by a letter on the front crankshaft
counterweight as shown in the illustration. The lettering sequence
(A) is located opposite the bearing number (B) (depending on the
version, the numbering sequence begins with HL = main bearing).
Colored dot on crankshaft
R
Y
B

Color of bearing
Red
Yellow
Blue

Audi R8/Spyder Quick Reference Specification Book • September 2013

51

Allocation of Main Bearing Shells,
Used and Refaced Crankshafts

Bearing shells are allocated to cylinder block corresponding to
color markings stamped into the cylinder block. With used and
refaced crankshafts, measure the main crankshaft journals to
allocate the appropriate bearing shells. Thicker oversized bearing
shells are available for refaced crankshafts. These have the same
color markings as the original-size bearing shells. The bearing
identification refers to the first installation during production:
R = red, G = yellow, B = blue. During a second installation by
service, the next thinner bearing shell is installed, for example,
black instead of red, as shown in the following table.
Letter on cylinder block
R
G
B
52

Color of bearing
Black
Red
Yellow

Audi R8/Spyder Quick Reference Specification Book • September 2013

• With used and refaced crankshafts, measure the main crankshaft
journals to allocate the appropriate bearing shells.
• Any other markings on the crankshaft are invalid when refacing
crankshafts.
• Use the following table to allocate the bearing shells to the
diameter of the main crankshaft.
Crankshaft bearing
pin diameter in mm
Basic dimension
67.000
Repair stage
66.750 1)
1)

Color identification of bearing shells for guide
frame
Red
Yellow
Blue
66.978 to
66.971 to
66.964 to
66.972
66.965
66.958
66.728 to
66.721 to
66.714 to
66.722
66.715
66.708

The same color marking applies to the thicker oversized bearing for refaced
crankshafts as for new crankshafts despite the greater bearing thickness.

Fastener Tightening Specifications
Component
Connecting rod bearing cap to connecting rod 2) 3)
Cylinder block plug
Drain plug
Protection tube flange
Flywheel 2)
Generator bracket
Ribbed belt idler roller
Oil spray jet 4)
Starter ring gear
Suction module plug
Ribbed belt tensioning element 1)
1)

2)
3)
4)

Nm
40 plus an
additional 120°
(⅓ turn)
9
45
9
60 plus an
additional 90°
(¼ turn)
42
22
9
12
45
28
55

For bolt tightening clarification, refer to ElsaWeb, Ribbed Belt Drive Overview, items
1 and 2.
Replace fastener(s).
Lubricate the threads and contact surface..
Insert the bolt with locking compound.

Audi R8/Spyder Quick Reference Specification Book • September 2013

53

Engine –
5.2L CTPA, CTYA

Allocation of Crankshaft Bearing
Shells for Guide Frame

Vibration Damper Tightening Specifications

Step

1)

Component

Nm

1

Tighten bolts in a diagonal sequence 1)

15

2

Tighten bolts in a diagonal sequence

22

3

Tighten bolts in a diagonal sequence

an additional
90° (¼ turn)

Replace fastener(s).

54

Audi R8/Spyder Quick Reference Specification Book • September 2013

1)

Engine –
5.2L CTPA, CTYA

Guide Frame Tightening Specifications

Step
1

Component
Tighten bolts 1 through 12 in sequence 1)

Nm
30

2

Tighten bolts 13 through 24 in sequence 1)

20

3

Tighten bolts 1 through 12 in sequence

50

4

Tighten bolts 13 through 24 in sequence

40

5

Tighten bolts 1 through 12 in sequence

6

Tighten bolts 13 through 24 in sequence

7

Tighten the guide frame-to-cylinder block
sealing surface bolts (not numbered) in a
diagonal sequence

an additional
180° (½ turn)
an additional
135°
9

Replace fastener(s).

Audi R8/Spyder Quick Reference Specification Book • September 2013

55

Crankshaft Dimensions
Honing
Crankshaft
dimension in mm bearing journal diameter
Basic dimension
67.000
-0.022
-0.042
Repair stage
66.750
-0.022
-0.042

Crankshaft connecting
rod journal diameter
54.000
-0.024
-0.040
53.750
-0.024
-0.040

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

New

Wear limit

0.20 to 0.35
0.20 to 0.40
0.20 to 0.40

0.80
0.80
0.80

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

New

Wear limit

0.02 to 0.07
0.005 to 0.045
0.02 to 0.06

0.20
0.200
0.15

Piston and Cylinder Dimensions

Matching pistons are allocated to the different
manufacturing stages of the cylinder block.
Cylinder bore diameter in mm
84.510 ± 0.005
84.610 ± 0.005
1)

Piston diameter in mm
84.490 1)
84.590 1)

Measurement with coating (thickness = 0.01 mm). The graphite coating wears
away.

56

Audi R8/Spyder Quick Reference Specification Book • September 2013

Fastener Tightening Specifications
Component
Exhaust camshaft adjuster
Initial tightening specifications