sensor AUDI A6 2000 C5 / 2.G AHA ATQ Engines Valve Gear Service Manual

15-5


11 -
Hydraulic valve lifter (intake)
Notes page 15
-45
12 -
Valve keepers
13 -
Valve spring retainer
14 -
Valve spring
15 -
Valve stem oil seal
Replacing with cylinder head installed
page 15
-47

16 -
Rubber/metal seal
Always replace
17 -
Seal Always replace
18 -
Cylinder head Removing and installing page 15
-18
Checking for distortion page 15
-27
Resurfacing page 15
-28
19 -
Exhaust valve
20 -
Intake valve
21 -
Oil seal
Camshaft Position (CMP) sensor side
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15-6


22 -
Shutter wheel for Camshaft Position
(CMP) sensor -G40-
Note position (notch on camshaft)
23 -
Washer Conical
24 -
Bolt 25 Nm (18 ft lb)
25 -
Camshaft Position (CMP) sensor -G40-
26 -
Bolt 10 Nm (7 ft lb)
27 -
Bolt 55 Nm (41 ft lb)
28 -
Camshaft sprocket
29 -
Oil seal Toothed belt sideReplacing page 15
-14
30 -
Hydraulic valve lifter
Notes page 15
-45
Removing and installing with cylinder head
installed page 15
-31

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15-10


15 -
Valve spring retainer
16 -
Valve spring
17 -
Valve stem oil seal
Replacing with cylinder head installed
page 15
-47

18 -
Rubber/metal seal
Always replace
19 -
Seal Always replace
20 -
Cylinder head Removing and installing page 15
-18
Checking for distortion page 15
-27
Resurfacing page 15
-28
21 -
Exhaust valve
22 -
Intake valve
23 -
Oil seal
Camshaft Position (CMP) sensor sideReplacing page 15
-14
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15-11


24 -
Shutter wheel for Camshaft Position
(CMP) sensor -G40-
Note position (notch on camshaft)
25 -
Washer Conical
26 -
Bolt 25 Nm (18 ft lb)
27 -
Camshaft Position (CMP) sensor -G40-
28 -
Bolt 10 Nm (7 ft lb)
29 -
Bolt 55 Nm (41 ft lb)
30 -
Camshaft sprocket
31 -
Oil seal Toothed gear sideReplacing page 15
-14
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15-15

Oil seal on Camshaft Position (CMP) sensor
(left and right cylinder head)

- Unbolt Camshaft Position (CMP) sensor.

Tightening torque: 10 Nm (7 ft lb)

- Unbolt shutter wheel for Camshaft Position
(CMP) sensor and carefully pry out using
screwdriver.

Tightening torque: 20 Nm (15 ft lb)

- Screw in bolt from 2085/1 adapter.

Do not lubricate sealing lip or outer edge of seal before pressing in. - Remove seal using 2085 seal puller and bolt from 2085/1.
- Clean contact surface and sealing surface.
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15-16


Rear sealing flange (left cylinder head)
The sealing flange and rear oil seal on the left cylinder head must be
replaced together as follows: - Press seal flush using 3241/1 press sleeve and 3241/3 bolt.
- Unbolt engine coolant expansion tank from bracket.
- Remove crankshaft ventilation line from cylinder head cover.
- Unbolt Camshaft Position (CMP) sensor.
Tightening torque: 10 Nm (7 ft lb)
- Unbolt shutter wheel for Camshaft Position (CMP) sensor G40 and
carefully pry out using screwdriver.
- Remove cylinder head cover.

- Remove double bearing cap (arrows).
- Remove seal and sealing flange.
- Clean running and sealing surfaces as well as contact surface of
double bearing cap.
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cover.
- Remove intake air duct between Mass Air Flow (MAF) sensor and
intake air elbow.
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15-20


- Disconnect blue harness connector on Intake Manifold Tuning (IMT)
valve.
- Disconnect black harness connector for intake air temperature sensor
on resonator.
- Cut tie wraps and move wiring to side.
- Disconnect vacuum line at cruise control vacuum diaphragm and at
vacuum booster.
- Unbolt cruise control vacuum diaphragm and unhook cruise control
vacuum diaphragm linkage at throttle body.
- Disconnect harness connector on throttle body and vacuum lines on
fuel pressure regulator.

- Disconnect harness connectors from camshaft adjustment valve and
from fuel injectors (arrows).
- Disconnect harness connectors from Engine Coolant Temperature
(ECT) sensor and Camshaft Position (CMP) sensor (arrows).
- Cut tie wraps on valve cover.
- Unclip wiring retainer on fuel rail and disconnect crankshaft housing
ventilation lines from left and right-side valve covers. Move hoses and
wiring clear (to rear).
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15-22


- Disconnect vacuum line at throttle body and line between vacuum
booster and intake air elbow (arrows).
- Remove intake air elbow.
- Remove intake manifold.
- Disconnect heated oxygen sensor harness connector at left-side of
heater core and set aside.

- Remove left-rear toothed belt guard (arrows).
- Unbolt coolant hose at rear of cylinder head.
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15-26

Tightening torques

Component
Tightening
torque
Bolts M6 10 Nm (7 ft lb)
Bolts M8 20 Nm (15 ft lb)
Camshaft bearing cap and
camshaft adjuster 10 Nm (7 ft lb)
Exhaust manifold to cylinder
head 25 Nm (18 ft lb)
Front exhaust pipe to exhaust
manifold 25 Nm (18 ft lb)
Heated Oxygen Sensor
(HO2S) 50 Nm (37 ft lb)
Spark plugs 25 Nm (18 ft lb)
Toothed belt sprocket to
camshaft 55 Nm (41 ft lb)
Intake manifold to cylinder
head 10 Nm (7 ft lb)
Cylinder head cover 10 Nm (7 ft lb)
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