NHTSA ID Number: 10205700
Manufacturer Communication Number: Guide
TSB/Document Date: 2021-12-27
Summary
Quick reference specification book.
Fastener
size
M6
M7
M8
M10
M12
-
Nm
-
9
15
20
40
65
120 plus an
additional 180°
(½ turn)
60
50
15
-
50
75
-
40
75
Replace fastener(s).
54
Audi
Q7 Quick Reference Specification Book
•
September 2013
Engine – 3.0L
CTWA, CTWB
Engine to Automatic Transmission
Item
1
2-5
6, 7
8, 9, 10
11
A
1)
Bolts 1)
Nm
M10x95
15 plus an additional 90° (¼ turn)
M12x75
30 plus an additional 90° (¼ turn)
M12x140
30 plus an additional 90° (¼ turn)
M10x60
15 plus an additional 90° (¼ turn)
M10x45
15 plus an additional 90° (¼ turn)
Alignment sleeves for centering
Aluminum bolts may be used two times
Audi Q7 Quick Reference Specification Book
•
September 2013
55
Crankshaft, Cylinder Block – 3.0L CTWA,
CTWB
Allocation of Crankshaft Bearing
Shells for Cylinder Block
Bearing shells with the correct thickness are allocated to
the cylinder block in the factory. Colored dots on the bearing
shells identify bearing shell thickness. The Æ points to the
belt pulley side. The allocation of the bearing shells to the
cylinder block is identified with a letter by each bearing.
Letter on cylinder block
R
G
B
S
56
Color of bearing
Red
Yellow
Blue
Black
Audi Q7 Quick Reference Specification Book
•
September 2013
Engine – 3.0L
CTWA, CTWB
Allocation of Crankshaft Bearing
Shells for Guide Frame
Bearing shells with the correct thickness are allocated to the
bearing cap at the factory. Colored dots on sides of bearing
shells serve for identifying bearing shell thickness. Allocation of
bearing shells to guide frame is marked on transmission flange of
crankshaft by a row of letters. The first letter of the row of letters
represents bearing “1”, the second letter is for bearing “2”, etc.
Letter on crankshaft
R
G
B
S
Audi Q7 Quick Reference Specification Book
Color of bearing
Red
Yellow
Blue
Black
•
September 2013
57
Fastener Tightening Specifications
Component
Bracket for generator
Connecting rod bearing cap bolt 1)
Nm
20
50 plus an
additional 90°
(¼ turn)
60 plus an
additional 90°
(¼ turn)
40
42
9
40
14
20 plus an
additional 90°
(¼ turn)
Drive plate bolt 1)
Idler roller for ribbed belt bolt
Idler roller for ribbed belt (supercharger) bolt
Oil spray jet for piston cooling
Tensioning element for ribbed belt bolt
Top Dead Center (TDC) marking locking bolt
Vibration damper-to-crankshaft bolt 1)
1)
Replace fastener(s).
58
Audi Q7 Quick Reference Specification Book
•
September 2013
Engine – 3.0L
CTWA, CTWB
Ribbed Belt Sealing Flange Tightening Specification
Step
1
Component
Tighten the bolts (Æ) in a diagonal sequence
Audi Q7 Quick Reference Specification Book
•
Nm
9
September 2013
59
Guide Frame Tightening Specifications
1)
Component
Nm
1
Tighten bolts 1 through 16 in sequence
2
Tighten bolts 1 through 16 in sequence
3
Tighten bolts 17 through 31 in sequence (for
guide frame sealing surfaces on cylinder block)
50
1)
an additional
90° (¼ turn)
23
Replace fastener(s).
60
Audi Q7 Quick Reference Specification Book
•
September 2013
Crankshaft bearing pin
diameter
65.000
-0.022
-0.042
Crankshaft connecting
rod journal diameter
56.000
-0.022
-0.042
Piston Ring End Gaps
Piston ring
dimensions in mm
1st compression ring
2nd compression ring
Oil scraping ring
1)
New
Wear limit
0.20 to 0.30
0.50 to 0.70
0.25 to 0.50
0.80
0.80
– 1)
Not determined yet.
Piston Ring Clearance
Piston ring
dimensions in mm
1st compression ring
2nd compression ring
Oil scraping ring
New
Wear limit
0.04 to 0.08
0.03 to 0.07
0.02 to 0.06
0.20
0.20
0.15
Piston and Cylinder Dimensions
Honing dimension
in mm
Basic dimension
1)
Piston diameter
Cylinder bore diameter
84.49 1)
84.51
Dimension without graphite coating (thickness 0.02 mm). The graphite coating
wears away.
Audi Q7 Quick Reference Specification Book
•
September 2013
61
Engine – 3.0L
CTWA, CTWB
Crankshaft Dimensions
Honing dimension
in mm
Basic dimension
Cylinder Head, Valvetrain – 3.0L CTWA,
CTWB
Fastener Tightening Specifications
Component
Balance Shaft
Balance Shaft Chain Sprocket 1)
Balance shaft bearing end bracket-to-cylinder
block bolt
Bearing Plate for Drive Sprocket 1)
Bracket for Electrical Wires
Bearing Plate for the Right Camshaft Timing
Chain Drive Sprocket 1)
Camshaft Adjuster for Intake Camshaft 1)
Camshaft Adjustment Solenoid Valve
Camshaft Chain Sprocket for Exhaust Camshaft 1)
Chain Tensioner
Chain Tensioner with Glide Track 1)
Drive Chain for Timing Mechanism 1)
Drive Sprocket for Oil Pump 1)
Guide Rail 1) 4)
Guide Rail 1) 5)
Mounting Pin for Drive Sprocket 1) 2)
Mounting Pin for Drive Sprocket 1) 3)
Oil dipstick guide tube
1)
2)
3)
4)
5)
Nm
60
15 plus an additional
90° (¼ turn)
13
8 plus an additional
45° (⅛ turn)
9
8 plus an additional
45° (⅛ turn)
80 plus an additional
90° (¼ turn)
5
80 plus an additional
90° (¼ turn)
9
10 plus an additional
45° (⅛ turn)
10 plus an additional
90° (¼ turn)
30 plus an additional
90° (¼ turn)
10 plus an additional
90° (¼ turn)
8 plus an additional
45° (⅛ turn)
5 plus an additional
60° (1⁄6 turn)
30 plus an additional
90° (¼ turn)
9
Replace fastener(s).
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, items 3 and 4.
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, items 14 and 15.
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, items 1 and 2.
For bolt tightening clarification, refer to ElsaWeb, Timing Mechanism Drive Chain
Overview, items 9 and 10.
62
Audi Q7 Quick Reference Specification Book
•
September 2013
Bar pressure
11.0 to 14.0
10.0
3.0
Valve Dimensions
Diameter a
Diameter b
c
Dimension
mm
mm
mm
33.85 ± 0.10
5.98 ± 0.01
104.0 ± 0.2
28.0 ± 0.1
5.96 ± 0.01
101.9 ± 0.2
α
∠°
45
45
NOTE: Intake and exhaust valves must not be
refaced by grinding. Only lapping is permitted.
Audi Q7 Quick Reference Specification Book
•
September 2013
63
Engine – 3.0L
CTWA, CTWB
Compression Checking Specifications
Compression pressure
New
Wear limit
Maximum difference between cylinders
Left Timing Chain Cover Tightening Specifications
Step
1
2
Component
Tighten bolts 1 through 8 in sequence (replace
bolts)
Tighten bolts 1 through 8 in sequence
Nm
5
an additional
90° (¼ turn)
The brackets (A and B) are connected with the left timing chain cover.
64
Audi Q7 Quick Reference Specification Book
•
September 2013
Engine – 3.0L
CTWA, CTWB
Right Timing Chain Cover Tightening Specifications
Step
1
2
Component
Nm
Tighten bolts 1 through 8 in sequence (replace
bolts)
Tighten bolts 1 through 8 in sequence
5
an additional
90° (¼ turn)
The bracket (Æ) is connected with the right timing chain cover.
Audi Q7 Quick Reference Specification Book
•
September 2013
65
Lower Timing Chain Cover Tightening Specifications
Replace bolts that are tightened to the specification.
Step
Nm
1
Tighten the bolts (Æ)
3
2
Tighten bolts 1 through 10 in a diagonal
sequence
Tighten bolts 1, 2, 4, 5, 7, and Æ
3
3
66
Component
an additional
90° (¼ turn)
8
4
Tighten bolts 8, 9 and 10
5
Tighten bolts 8, 9 and 10
6
Tighten bolt 3
7
Tighten bolt 6
20
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TSB/Document ID: Guide
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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