NHTSA ID Number: 10123813
Manufacturer Communication Number: Quick Reference
TSB/Document Date: 2017-11-17
Summary
This document contains the Audi
A8/A8L/S8 quick reference specification book.
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TSB/Document ID: Quick Reference
Replacement Service Bulletin Number:
MFR Communication Date: 2013-03-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Measurement with graphite coating (thickness 0.01 mm). The graphite coating
wears away.
90
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
Cylinder Head, Valvetrain – 4.0L CEUA,
CGTA
Camshaft adjustment valve 2 to camshaft housing
Camshaft adjuster for the exhaust camshaft 1)
Camshaft adjuster for the intake camshaft 1)
Chain tensioner for the left camshaft control chain 1)
Chain Tensioner for the right camshaft timing chain 1)
Chain tensioner to engine 1)
Chain tensioner with glide track to engine 1)
Drive sprocket for the right camshaft timing chain 1)
Glide Track 1)
Gliding piece to engine 1)
Engine lifting eye to cylinder head
Exhaust camshaft adjustment valve 2 to camshaft
housing
Idler sprocket for the power take-off drive chain to engine
Intake/exhaust camshaft to cylinder head
Mounting pin to bearing plate 1)
1)
Nm
9
5 plus an
additional 90°
(¼ turn)
5
80 plus an
additional 90°
(¼ turn)
80 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
20 plus an
additional 45°
(⅛ turn)
17 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
22
5
42
5
5 plus an
additional 90°
(¼ turn)
Replace fastener(s).
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
91
Engine –
4.0L CEUA, CGTA
Fastener Tightening Specifications
Component
Bearing plate for drive sprocket
Bracket for idler sprocket 1)
Compression Checking Specifications
Compression pressure
New
Wear limit
Maximum difference between cylinders
Bar pressure
Engine Code
CEUA
10.0 to 15.0
9.0
3.0
Bar pressure
Engine Code
CGTA
10.0 to 14.0
8.0
3.0
Valve Dimensions
Dimension
Diameter a
mm
Diameter b
mm
c
mm
α
∠°
Intake valve
33.85 ± 0.10
5.98 ± 0.01
103.97 ± 0.20
45
Exhaust valve
28.0 ± 0.1
5.96 ± 0.01
101.9 ± 0.2
45
NOTE: Intake and exhaust valves must not be
refaced by grinding. Only lapping is permitted.
92
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
Engine –
4.0L CEUA, CGTA
Left Timing Chain Cover Tightening Specification
Replace any bolts that were tightened with an additional turn.
Step
1
Component
Tighten bolts 1 through 8 in sequence
Nm
9
2
Tighten bolts 1 through 8 in sequence
an additional
90° (¼ turn)
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
93
Right Timing Chain Cover Tightening Specification
Replace any bolts that were tightened with an additional turn.
Step
1
Component
Tighten bolts 1 through 8 in sequence
Nm
9
2
Tighten bolts 1 through 8 in sequence
an additional
90° (¼ turn)
94
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
Engine –
4.0L CEUA, CGTA
Lower Timing Chain Cover Tightening Specifications
Replace any bolts that were tightened with an additional turn.
Step
Nm
Tighten bolts (Æ)
5
2
Tighten bolts 2 through 8 in a diagonal
sequence)
Tighten bolts (Æ)
8
5
Tighten bolts 2 through 8 in a diagonal
sequence
Tighten bolts (Æ)
6
Tighten bolt 1)
an additional
90° (¼ turn)
an additional
90° (¼ turn)
Tighten for
power steering
pump
3
4
1)
Component
1
8
For bolt tightening clarification, refer to ElsaWeb, Suspension, Wheels, Steering;
Rep. Gr.48; Specifications
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
95
Cylinder Head Tightening Specifications
Replace any bolts that were tightened with an additional turn.
Step
96
Component
Nm
Hand-tighten
1
Tighten bolts 1 through 10 in sequence 1)
2
Tighten bolts 1 through 10 in sequence
3
Tighten bolts 1 through 10 in sequence
60
4
Tighten bolts 1 through 10 in sequence
5
Tighten bolts 1 through 10 in sequence
6
Tighten bolts (Æ)
an additional
90° (¼ turn)
an additional
90° (¼ turn)
10
7
Tighten bolts (Æ)
Audi A8/A8L/S8 Quick Reference Specification Book
30
an additional
90° (¼ turn)
•
March 2013
Engine –
4.0L CEUA, CGTA
Camshaft Housing Tightening Specifications
Replace any bolts that were tightened with an additional turn.
Step
Component
Nm
Hand-tighten 2)
1
Tighten bolts 1 through 22 in sequence
2
Tighten bolts 1 through 22 in sequence
8
3
Tighten bolts 1 through 22 in sequence
an additional
90° (¼ turn)
1)
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
97
Lubrication – 4.0L CEUA, CGTA
Fastener Tightening Specifications
Component
Cover in the inner V-to-engine 1)
Cover-to-upper oil pan
Drain plug-to-engine
Guide tube-to-upper oil pan
Intake tube for oil pump
Oil drain plug-to-lower oil pan
Oil drain plug-to-oil filter cap
Oil filter cap
Oil level thermal sensor-to-lower oil pan
Oil pipe to oil pump 1)
Oil pipes-to-upper oil pan (for vehicles with engine code
CGTA)
Oil pressure regulation valve-to-engine
Oil pressure switch
Oil pressure switch, level 3
Oil return line-to-right engine oil cooler
Oil separator
Oil supply line-to-right engine oil cooler
Oil temperature sensor-to-engine 2 double bolt
Pipe for the crankcase ventilation
Rear air guide-to-right engine oil cooler
Reduced oil pressure switch
Right engine oil cooler (Engine Code CGTA)
1)
Nm
5 plus an
additional 90°
(¼ turn)
8
30
9
9
20
4
25
9
8 plus an
additional 90°
(¼ turn)
9
9
20
20
9
3.2
9
9
3.2
9
20
9
Replace fastener(s).
98
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
Engine –
4.0L CEUA, CGTA
Upper Oil Pan Tightening Specifications
Replace any bolts that were tightened with an additional turn.
Step
1
2
3
Component
Nm
Tighten bolts 1 through 6 in a diagonal
sequence
Tighten bolts 1 through 6 in a diagonal
sequence
Tighten bolts 1 through 6 in a diagonal
sequence
Audi A8/A8L/S8 Quick Reference Specification Book
Hand-tighten
8
an additional
90° (¼ turn)
•
March 2013
99
Oil Pan Tightening Specifications
Replace any bolts that were tightened with an additional turn.
Step
1
2
3
100
Component
Tighten bolts (Æ) in a diagonal sequence
Tighten bolts (Æ) in a diagonal sequence
Tighten bolts (Æ) in a diagonal sequence
Audi A8/A8L/S8 Quick Reference Specification Book
Nm
Hand-tighten
5
an additional
90° (¼ turn)
•
March 2013
Engine –
4.0L CEUA, CGTA
Front Engine Oil Cooler Tightening Specification
Step
1
Component
Tighten bolts 1 through 7 in sequence
Nm
3
2
Tighten bolts 1 through 7 in sequence
9
Audi A8/A8L/S8 Quick Reference Specification Book
•
March 2013
101
Cooling System – 4.0L CEUA, CGTA
Fastener Tightening Specifications
Component
Bracket for after-run coolant pump 2)
- Bolt
- Bolt
- Nut
Bracket for charge air cooling pump-to-bracket for afterrun coolant pump
Bracket for engine coolant circulation pump 2-to-engine
coolant circulation pump 2
Bracket for engine coolant circulation pump 2-to-engine
Bracket for left cooler for charge air cooling circuit
Coolant connection-to-housing for the coolant pump
Coolant switch-off valve 1)
Engine coolant temperature sensor-to-engine
Engine temperature control sensor-to-engine
Fan shroud-to-fan
Fan wheel-to-fan shroud
Front charge air cooling circuit radiator-to-radiator
Housing for the coolant pump-to-coolant pump 1)
Hydraulic oil cooler-to-condenser
Lower left coolant pipe
Map controlled engine cooling thermostat-to-housing for
the coolant pump
Right coolant pipe on the right side of the transmissionto-engine
Transmission coolant valve bracket for engine coolant
circulation pump 2 to engine (vehicles with engine codes
CEUA)
Transmission fluid cooling valve-to-abracket for after-run
coolant pump
Upper left coolant pipe-to-aengine nut
Upper rear coolant pipe-to-aengine
1)
2)
Nm
1.5
9
9
9
1.5
9
9
9
5 plus an
additional 90°
(¼ turn)
9
9
3.5
5
5
8 plus an
additional 90°
(¼ turn)
5
9
9
9
9
9
9
9
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, After-Run Coolant Pump -V51-,
Charge Air Cooling Pump -V188-, Transmission Coolant Valve -N488- Overview“
items 2, 5, 6 and 9
102
Audi A8/A8L/S8 Quick Reference Specification Book
•
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