NHTSA ID Number: 10203510
Manufacturer Communication Number: QRSB AUDI A6 S6
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
(¼ turn)
9
30 plus an
additional 90°
(¼ turn)
9
30 plus an
additional 90°
(¼ turn)
8 plus an
additional 45°
(⅛ turn)
9
30 plus an
additional 90°
(¼ turn)
Bearing end bracket
Camshaft adjustment solenoid valve
Chain tensioner with glide track 1)
Drive sprocket bearing plate 1)
Drive sprocket mounting pin 3)
Exhaust camshaft chain sprocket 1)
Glide track, bolt
Glide track, bolt Guide rail 1)
Intake camshaft adjuster 1)
Left camshaft control chain tensioner
Mounting pin for drive sprocket bolt 2)
Oil dipstick guide tube
Oil pump drive sprocket 1)
Right camshaft timing chain drive sprocket bearing
plate 1)
Right camshaft timing chain tensioner
Right timing chain drive sprocket 1)
50
Audi
A6/S6 Quick Reference Specification Book
•
September 2013
1)
2)
3)
Nm
9
Engine –
3.0L CTUA
Component
Timing mechanism drive train chain tensioner
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, item 4.
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, item 3.
Compression Checking Specifications
Compression pressure
New
Wear limit
Maximum difference between cylinders
Bar pressure
11.0 to 14.0
10.0
3.0
Valve Dimensions
Dimension
Diameter a
mm
Diameter b
mm
c
mm
α
∠°
Intake valve
33.85 ± 0.10
5.98 ± 0.01
104.0 ± 0.2
Exhaust valve
28.0 ± 0.1
5.96 ± 0.01
101.9 ± 0.2
45
45
NOTE: Intake and exhaust valves must not be
refaced by grinding. Only lapping is permitted.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
51
Left Timing Chain Cover Tightening Specifications
Step
1
2
1)
Component
Tighten bolts 1 through 8 in sequence 1)
Tighten bolts 1 through 8 in sequence
Nm
5
an additional
90° (¼ turn)
Replace fastener(s).
NOTE: Brackets A and B are connected with the timing chain cover.
52
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
3.0L CTUA
Right Timing Chain Cover Tightening Specifications
Step
1
2
1)
Component
Tighten bolts 1 through 8 in sequence 1)
Tighten bolts 1 through 8 in sequence
Nm
5
an additional
90° (¼ turn)
Replace fastener(s).
NOTE: Brackets A and B are connected with the timing chain cover.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
53
Lower Timing Chain Cover Tightening Specifications
1)
Component
Nm
1
Tighten the bolts (Æ) 1)
3
2
3
3
Tighten bolts 1 through 10 in a diagonal
sequence 1)
Tighten bolts 1, 2, 4, 5, 7, and (Æ)
4
-Arrows-
an additional
90° (¼ turn)
9
5
Tighten bolts 8, 9 and 10
8
6
Tighten bolts 8, 9 and 10
7
Tighten bolt 3
an additional
90° (¼ turn)
16
8
Tighten bolt 6
20
9
Tighten bolt 6
an additional
90° (¼ turn)
Replace fastener(s) except bolt 3.
54
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
3.0L CTUA
Cylinder Head Tightening Specifications
NOTE: The left cylinder head is shown.
The right cylinder head is identical.
Step
1
Component
Nm
Hand-tighten
2
Replace and tighten bolts 1 through 8 in
sequence
Tighten bolts 1 through 8 in sequence
3
Tighten bolts 1 through 8 in sequence
4
Tighten bolts 1 through 8 in sequence
an additional
90° (¼ turn)
an additional
90° (¼ turn)
Audi A6/S6 Quick Reference Specification Book
40
•
September 2013
55
Camshaft Guide Frame Tightening Specifications
NOTE: The left cylinder head camshaft guide frame is shown.
The right cylinder head camshaft guide frame is identical.
Step
1
2
3
1)
2)
Component
Tighten bolts 1 through 21 in sequence 1) 2)
Nm
Hand-tighten
Tighten bolts 1 through 21 in sequence
Tighten bolts 1 through 21 in sequence
8
an additional
90° (¼ turn)
Replace fastener(s)
The guide frame must be in contact with the entire contact surface of the cylinder
head.
56
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
3.0L CTUA
Left Cylinder Head Cover Tightening Specification
Step
1
Component
Nm
Tighten bolts 1 through 12 in sequence
Audi A6/S6 Quick Reference Specification Book
9
•
September 2013
57
Right Cylinder Head Cover Tightening Specification
Step
1
58
Component
Nm
Tighten bolts 1 through 12 in sequence
Audi A6/S6 Quick Reference Specification Book
9
•
September 2013
Fastener Tightening Specifications
Component
Chain sprocket bracket
Chain sprocket 1)
Nm
9
30 plus an
additional 90°
(¼ turn)
9
2.5
9
3 plus an
additional 90°
(¼ turn)
3 plus an
additional 90°
(¼ turn)
20
30
9
13
25
9
20
20
20
3 plus an
additional 90°
(¼ turn)
Cover with oil separator
Crankcase ventilation hose
Engine oil cooler 1) 2)
Lower oil baffle 1)
Oil check valve
Oil drain plug
Oil filter housing 4)
Oil filter housing cap
Oil level thermal sensor nut
Oil pressure switch
Oil pump
Reduced oil pressure switch
Upper oil baffle1) 3)
1)
2)
3)
4)
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Oil Pan Upper and Lower
Sections, Oil Pump and Oil Cooler Overview, items 15 and 17.
Insert with locking compound.
For bolt tightening clarification, refer to ElsaWeb, Oil Filter Housing and Oil
Pressure Switch Overview, items 1, 4, 5 and 13.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
59
Engine –
3.0L CTUA
Lubrication – 3.0L CTUA
Upper Oil Pan Tightening Specifications
Step
1
60
Component
Nm
Tighten bolts 1 through 6 in a diagonal
sequence instages
20
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
3.0L CTUA
Oil Pan Tightening Specifications
Step
1
2
Component
Tighten bolts in a diagonal sequence
Tighten bolts in a diagonal sequence
Audi A6/S6 Quick Reference Specification Book
Nm
8
an additional
90° (¼ turn)
•
September 2013
61
Cooling System – 3.0L CTUA
Fastener Tightening Specifications
Component
Coolant hose connecting piece
Coolant pump
Coolant pump ribbed belt pulley
Coolant thermostat
Engine temperature control sensor
Fan rib
Fan wheel
Front charge air cooling circuit radiator
Front coolant pipe 1)
Nm
9
9
20
9
3
3.5
5
4.5
2.5
9
9
9
22
3 plus an
additional 90°
(¼ turn)
9
22
9
22
5
9
4.5
9
9
22
9
5
Left charge air cooling circuit radiator
Left charge air cooling circuit radiator bracket 2)
Left coolant pipes
Left front coolant pipes
Left front coolant pipes bracket
Lower coolant pipe on the supercharger
Lower left coolant pipe
Radiator bracket
Right coolant pipe on the right side of the transmission
Rubber buffer
Transmission coolant valve bracket
Transmission coolant valve heat shield
Transmission coolant valve-to-lower left coolant pipe
Upper coolant pipe
Upper coolant pipe on the supercharger
1)
2)
For bolt tightening clarification, refer to ElsaWeb, Coolant Pipes Overview, items 6,
7 and 27.
For bolt tightening clarification, refer to ElsaWeb, Radiator Overview items 5, 6 and
8.
62
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
3.0L CTUA
Coolant Pump Tightening Specification
Step
1
Component
Nm
Tighten bolts (Æ) in a diagonal sequence
Audi A6/S6 Quick Reference Specification Book
•
9
September 2013
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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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