NHTSA ID Number: 10203510
Manufacturer Communication Number: QRSB AUDI
A6 S6
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
2)
3)
Engine –
2.0L CAED
4)
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Balance Shaft Timing Chain
Overview, item 4.
For bolt tightening clarification, refer to ElsaWeb, Camshaft Timing Chain Overview,
items 5 and 7.
For bolt tightening clarification, refer to ElsaWeb, Camshaft Timing Chain Overview,
item 2.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
23
Valve Dimensions
Dimension
Diameter a
mm
Diameter b
mm
c
mm
α
∠°
Intake valve
33.85 ± 0.10
5.98 ± 0.01
104.0 ± 0.2
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.
Compression Pressures
New
Bar positive pressure
11.0 to 14.0
24
Wear limit
Bar positive pressure
7.0
Difference between
cylinders
Bar positive pressure
Max. 3.0
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Cylinder Head Removal Specifications
Engine –
2.0L CAED
Remove cylinder head bolts (Æ) and 1 through 10 in sequence.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
25
Cylinder Head Tightening Specifications
Step
1
2
Component
Tighten bolts 1 through 10 in sequence
Tighten bolts 1 through 10 in sequence
3
Tighten bolts 1 through 10 in sequence
4
5
Tighten bolts (Æ)
Tighten bolts (Æ)
26
Audi A6/S6 Quick Reference Specification Book
Nm
40
an additional
90° (¼ turn)
an additional
90° (¼ turn)
8
an additional
90° (¼ turn)
•
September 2013
Cylinder Head Cover Removal Specifications
Engine –
2.0L CAED
Loosen cylinder head cover bolts 1 through 6 in sequence.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
27
Cylinder Head Cover Tightening Specifications
Nm
Hand-tighten
2
Tighten bolts 1 through 6 in sequence in several
stages 1)
Tighten bolts 1 through 6 in sequence
3
Tighten bolts 1 through 6 in sequence
an additional
90° (¼ turn)
1
1)
Component
8
Replace fastener(s).
28
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Crankcase Ventilation Tightening Specification
Step
1
Component
Tighten bolts 1 through 10 in sequence
Nm
11
Step
1
Component
Tighten bolts 1 through 5 in sequence
Audi A6/S6 Quick Reference Specification Book
Engine –
2.0L CAED
Upper Timing Chain Cover Tightening Specification
Nm
9
•
September 2013
29
Lower Timing Chain Cover for 15
Bolts Tightening Specifications
Step
1
2
30
Component
Tighten bolts 1 through 15 in sequence
Tighten bolts 1 through 15 in sequence
Audi A6/S6 Quick Reference Specification Book
Nm
8
an additional
45° (⅛ turn)
•
September 2013
Lower Timing Chain Cover for 8 Bolts
Tightening Specifications
Component
Tighten bolts 1 through 15 in sequence
Tighten bolts 1 through 15 in sequence
Nm
8
an additional
45° (⅛ turn)
Engine –
2.0L CAED
Step
1
2
Audi A6/S6 Quick Reference Specification Book
•
September 2013
31
Lubrication – 2.0L CAED
Fastener Tightening Specifications
Component
Chain tensioner
Engine oil cooler
Oil baffle
Oil drain plug 1)
Oil level thermal sensor nut
Oil pressure regulation valve
Oil pressure switch
Oil pump
Reduced oil pressure switch
Suction line
1)
Nm
9
23
9
30
9
9
20
20
20
9
Replace fastener(s).
Upper Oil Pan Tightening Specifications
Step
1
2
32
Component
Tighten bolts 1 through 13 in sequence
Tighten bolts 1 through 13 in sequence
Audi A6/S6 Quick Reference Specification Book
Nm
15
an additional
90° (¼ turn)
•
September 2013
Oil Pan Tightening Specifications
Step
1
2
Component
Tighten bolts 1 through 19 in sequence
Tighten bolts 1 through 19 in sequence
Nm
8
an additional
45° (⅛ turn)
Step
1
Component
Tighten bolts 1 through 9 in sequence
Audi A6/S6 Quick Reference Specification Book
Engine –
2.0L CAED
Oil Separator Tightening Specification
Nm
9
•
September 2013
33
Cooling System – 2.0L CAED
Fastener Tightening Specifications
Component
Air guide bolt
After-run coolant pump (V51) bracket 5)
After-run coolant pump (V50) bracket 2)
Bracket bolt 3)
Bracket for coolant circuit solenoid valve and heater
coolant shut-off valve bolt
Coolant circuit solenoid valve to bracket bolt
Connecting piece
Coolant Fan Control (FC) module
Coolant pipe bolt
Drive gear for toothed belt bolt 1)
Fan rib-to-coolant fan
Front coolant pipe
Heater coolant shut-off valve to bracket bolt
High temperature circuit coolant pump bolt
Low temperature circuit coolant pump bolt
Radiator bracket 4)
Nm
5
23
4
9
23
9
9
3.5
5
5
9
9
2.7
9
4.5
5
4
4.5
6
10 plus an
additional 90°
(¼ turn)
9
Retaining plate
Rubber buffer to radiator bolt
Small coolant pipe
Toothed belt drive gear 1)
Toothed belt guard
1)
2)
3)
4)
5)
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Coolant Pipes and After-Run
Coolant Pump Overview, item 15.
For bolt tightening clarification, refer to ElsaWeb, Coolant Pipes and After-Run
Coolant Pump Overview, item 16.
For bolt tightening clarification, refer to ElsaWeb, Radiator Assembly Overview,
items 17 and 19.
For bolt tightening clarification, refer to ElsaWeb, Coolant Pump -V50- Overview
Overview, item 2.
34
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Coolant Pump Tightening Specification
Component
Tighten bolts 1 through 5 in sequence
Nm
9
Engine –
2.0L CAED
Step
1
Audi A6/S6 Quick Reference Specification Book
•
September 2013
35
Fuel Supply – 2.0L CAED
Fastener Tightening Specifications
Component
Accelerator pedal module
Air filter housing nut
Bolt for securing the fuel filler neck
Carrier plate
Evaporative Emission (EVAP) canister 2)
Exhaust system suspended mount
Fuel filler neck bolt
Fuel filler tube protective plate 1)
Fuel tank
Fuel tank leak detection control module to EVAP canister
Fuel pump control module
Heat shield lock washer
Locking flange cover
Locking ring
Suspended mount for exhaust system
1)
2)
Nm
8
8
20
20
1.5
20
20
20
3.5
20
20
1.5
1.6
2
1.5
110
20
For bolt tightening clarification, refer to ElsaWeb, EVAP Fuel Tank with Attachments
Overview, items 8 and 9.
For bolt tightening clarification, refer to ElsaWeb, EVAP System Overview, items 2,
3 and 14.
36
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Turbocharger, G-Charger – 2.0L CAED
Fastener Tightening Specifications
Component
Air guide pipe bolt (Hybrid)
Air guide pipe nut
Air guide pipe-to-bracket
Brace-to-turbocharger
Bracket-to-brace
Charge Air Cooler (CAC)
Charge air pressure sensor/intake air temperature
sensor bolt (Hybrid)
Charge air pressure sensor
Clamp (9 mm wide)
Clamp (13 mm wide)
Connection bolt
Coolant return line 3)
Crankcase ventilation line
Fastening strip nut 1)
Hose clamp
Oil return line
Oil supply line 2)
Right air guide pipe-to-oil pan
Turbocharger 5)
Turbocharger recirculating valve
Turbocharger vacuum diaphragm nut 4)
Turbocharger vacuum diaphragm bolt
Wastegate bypass regulator valve
1)
2)
3)
4)
5
3
5.5
9
9
35
9
30
5.5
9
9
30
10
30
7
9
10
3
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Turbocharger Overview Part II,
items 6, 8 and 9.
For bolt tightening clarification, refer to ElsaWeb, Turbocharger Overview Part II,
items 12, 13 and 14.
Secure with sealing wax.
Coat the bolt with hot bolt paste.
Engine –
2.0L CAED
5)
Nm
9
9
10
30
30
7
9
Audi A6/S6 Quick Reference Specification Book
•
September 2013
37
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TSB/Document ID: QRSB AUDI A6 S6
Replacement Service Bulletin Number:
MFR Communication Date: 2013-09-01
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:
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