NHTSA ID Number: 10203510
Manufacturer Communication Number: QRSB AUDI A6 S6
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
Black
Yellow
Green
Blue
Audi
A6/S6 Quick Reference Specification Book
•
September 2013
Fastener Tightening Specifications
Component
Connecting rod bearing cap -o-connecting rod 1)
Nm
50 plus an
additional 90°
(¼ turn)
60 plus an
additional 90°
(¼ turn)
22
9
Drive plate crankshaft 1)
Idler roller for the ribbed belt-to-engine
Oil spray jet
Tensioner for the ribbed belt-to-engine 2)
- Bolt
- Bolt
2)
Engine –
4.0L CEUC
1)
22
55
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Ribbed Belt Drive Overview,
items 1 and 2.
Vibration Damper, Tightening Specification
Step
1
2
3
Bolts
Arrow
Arrow
Arrow
Tightening Specification/Additional Turn
15 Nm in a diagonal sequence
22 Nm in a diagonal sequence
In a diagonal sequence, turn an additional 90°
Audi A6/S6 Quick Reference Specification Book
•
September 2013
77
Baffle Plate Tightening Specification
Step
1
2
78
Component
Tighten bolts 1 through 6 in sequence
Tighten bolts 1 through 6 in sequence
Audi A6/S6 Quick Reference Specification Book
Nm
5
an additional
90° (¼ turn)
•
September 2013
Engine –
4.0L CEUC
Guide Frame Tightening Specifications
Step
1
2
3
4
5
6
7
Bolts
1 through 10
11 through 20
1 through 10
1 through 10
11 through 20
11 through 20
Without numbering in
the illustration
Nm
30
30
50
an additional 90° (¼ turn)
50
an additional 90° (¼ turn)
9 Nm in a diagonal sequence
Audi A6/S6 Quick Reference Specification Book
•
September 2013
79
Spur Gear Unit Tightening Specifications
Tighten the bolts diagonally in the sequence -1 to 5- to 22 Nm.
Crankshaft Dimensions
Crankshaft with Crankshaft Bearing Journal Diameter 65 mm
Honing dimension in
mm
Crankshaft bearing
pin diameter
Basic dimension
65.000
Repair stage
65.750
– 0.022
– 0.042
– 0.022
– 0.042
Crankshaft
connecting rod
journal diameter
54.000
– 0.022
– 0.042
53.750
– 0.022
– 0.042
Crankshaft Dimensions
Crankshaft with Crankshaft Bearing Journal Diameter 67 mm
Honing dimension in
mm
Crankshaft bearing
pin diameter
Basic dimension
67.000
Repair stage
66.750
80
– 0.010
– 0.029
– 0.010
– 0.029
Crankshaft
connecting rod
journal diameter
54.000
– 0.022
– 0.042
53.750
– 0.022
– 0.042
Audi A6/S6 Quick Reference Specification Book
•
September 2013
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
New
Wear limit
0.035 to 0.085
0.005 to 0.045
0.020 to 0.055
0.200
0.150
0.200
Engine –
4.0L CEUC
Piston Ring Clearance
Piston ring dimensions
in mm
1st compression ring
2nd compression ring
Oil scraping ring
Piston and Cylinder Dimensions
Honing dimension in
mm
Nominal dimension
Repair stage
1)
2)
Piston diameter
Cylinder bore
diameter
84.510 ± 0.005 2)
84.610 ± 0.005 2)
84.490 1)
84.590 1)
Dimension without graphite coating (thickness 0.01 mm). The graphite coating
wears away.
Measure 50 mm inside the cylinder bore.
Audi A6/S6 Quick Reference Specification Book
•
September 2013
81
Cylinder Head, Valvetrain – 4.0L CEUC
Fastener Tightening Specifications
Component
Balance shaft
Bracket for idler sprocket to engine 1)
Camshaft adjuster for exhaust camshaft to camshaft 1)
Camshaft adjuster for intake camshaft to camshaft 1)
Camshaft adjustment valve to camshaft housing
Chain tensioner to engine 1)
Chain tensioner with glide track to engine 1)
Connection for coolant to right timing chain cover
Engine lifting eye to engine
Glide track to engine 1)
Intake/exhaust camshaft adjuster to camshaft housing
Mounting pin for left camshaft timing chain drive sprocket
to bearing plate 1)
Mounting pin for the right camshaft timing chain drive
sprocket to engine 1)
Mounting pin for idler sprocket to engine
1)
Nm
9
5 plus an
additional 90°
(¼ turn)
80 plus an
additional 90°
(¼ turn)
80 plus an
additional 90°
(¼ turn)
5
5 plus an
additional 90°
(¼ turn)
5 plus an
additional 90°
(¼ turn)
9
22
17 plus an
additional 90°
(¼ turn)
5
5 plus an
additional 90°
(¼ turn)
20 plus an
additional 45°
(⅛ turn)
42
Replace fastener(s).
Compression Checking Specifications
Compression pressure
New
Wear limit
Maximum difference between cylinders
82
Audi A6/S6 Quick Reference Specification Book
Bar pressure
10.0 to 15.0
9.0
3.0
•
September 2013
Engine –
4.0L CEUC
Valve Dimensions
Dimension
Diameter a
mm
Diameter b
mm
c
mm
α
∠°
Intake valve
33.85 ± 0.10
5.98 ± 0.007
103.97 ± 0.20
Exhaust valve
28.0 ± 0.1
5.935 ± 0.007
101.87 ± 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
83
Left Timing Chain Cover Tightening Specifications
Step
1
2
1)
Component
Tighten bolts 1 through 8 in sequence
Tighten bolts 1 through 8 in sequence 1)
Nm
5
an additional
90° (¼ turn)
Replace fastener(s)
NOTE: The mount -arrow- is affixed with the timing chain guard.
84
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
4.0L CEUC
Right Timing Chain Cover Tightening Specifications
Step
1
2
1)
Component
Tighten bolts 1 through 8 in sequence
Tighten bolts 1 through 8 in sequence 1)
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
85
Lower Timing Chain Cover Tightening Specifications
Nm
Tighten the bolts (Æ)
5
2
Tighten bolts 2 through 8 in a diagonal
sequence
Tighten the bolts (Æ)
8
3
4
86
Component
1
8
5
Tighten bolts 2 through 8 in a diagonal an additional 90° (¼ turn)
sequence
an additional 90° (¼ turn)
Tighten the bolts (Æ)
6
Tighten bolts 1
Tighten for the power
steering pump, refer to
ElsaWeb, Suspension
Wheels, Steering
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Engine –
4.0L CEUC
Cylinder Head Loosening
Loosen the cylinder head bolts in the sequence -1 to 10
Audi A6/S6 Quick Reference Specification Book
•
September 2013
87
Cylinder Head Tightening Specifications
NOTE: Replace any bolts that were tightened with an additional turn.
The cylinder head for cylinder bank 2 (left) is shown in the illustration.
Step
88
Component
Nm
1
Tighten bolts 1 through 10 in sequence
Hand-tighten
2
Tighten bolts 1 through 10 in sequence
30
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
Arrows
an additional 90°
(¼ turn)
an additional 90°
(¼ turn)
10
7
Arrows
Audi A6/S6 Quick Reference Specification Book
an additional 90°
(¼ turn)
•
September 2013
Engine –
4.0L CEUC
Camshaft Guide Frame Tightening Specifications
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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:
Previous TSB | Next TSB |
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