sensor AUDI A4 1999 B5 / 1.G APB Engine Valve Gear Service Workshop Manual

15-6


17 -
Valve stem seal
Replacing with cylinder head installed
Page 15
-90

18 -
Rubber/metal gasket
Always replace
19 -
Seal Always replace
20 -
Cylinder head Checking for distortion Page 15
-56
Reworking Page 15
-57
21 -
Exhaust valve
22 -
Inlet valve
23 -
Oil seal (Hall sensor end)
Always replace Page 15
-10
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15-7


24 -
Rotor for Hall sensor
Note position (notch on camshaft)
25 -
Washer Conical
26 -
25 Nm
27 -
Hall sensor
28 -
10 Nm
29 -
30 Nm +180 (1/2 turn)
30 -
Camshaft sprocket
31 -
Oil seal (toothed belt end)
Replacing Page 15
-10
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15-11

Oil seal at Hall sensor (right cylinder head)

- Remove intake hose going to air cleaner (arrows).

- Remove bolts -arrows- and remove engine cover panel -C-.
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15-12


Note:
Watch position of retaining strip -2-. - Remove pressure line -1- (right side).
- Unbolt Hall sensor housing (10 Nm).
- Remove bolt securing Hall sensor rotor (20 Nm) and carefully lever off
rotor with a screwdriver.

- Screw in bolt from oil seal extractor 2085/1.
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15-13


- Pull out seal with oil seal extractor 2085 and bolt 2085/1.
- Clean contact surface and sealing surface.
Do not apply oil to sealing lip or outer circumference of seal before
installing.
- Install guide sleeve (from tool set 3241) onto camshaft.

Installing
Install in reverse sequence.
Note:
When installing Hall sensor rotor, ensure that locating lug engages in slot
in camshaft. - Press in seal until flush using press sleeve 3241/1 and bolt 3241/3.
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15-14

Removing oil seal at Hall sensor (left cylinder
head)

Note:
Leave coolant hoses connected. - Detach coolant reservoir -arrows- and move clear to side.
- Unplug connector from coolant level monitor.
- Move wiring harness clear at bulkhead.

- Unbolt bracket -arrows- for plug connectors on bulkhead and move
clear to side.
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15-15

- Unbolt Hall sensor housing (10 Nm).

- Unbolt Hall sensor rotor (20 Nm) and carefully
lever off rotor using a screwdriver.

- Screw in bolt from 2085/1 oil ring extractor.

- Pull out seal with oil seal extractor 2085 and bolt 2085/1.
- Clean contact surface and sealing surface.
Do not apply oil to sealing lip or outer circumference of seal before
installing.
- install guide sleeve (from tool set 3241) onto camshaft.
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15-16


Installing
Install in reverse sequence.
Note:
When installing Hall sensor rotor, ensure that locating lug engages in slot
in camshaft. - Press in seal until flush using press sleeve 3241/1 and bolt 3241/3.
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15-18


Note:
Leave coolant hoses connected. - Remove coolant reservoir -arrows- and move it clear to the side.
- Unplug connector from coolant level monitor.
- Move wiring harness clear at bulkhead.

- Unbolt bracket -arrows- for plug connectors on bulkhead and move
clear to the side.
- Unbolt Hall sensor housing (10 Nm).
- Remove bolt securing Hall sensor rotor (20 Nm) and carefully lever off
rotor using a screwdriver.
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15-31


- Unclip solenoid valve for charge pressure control -1-.
- Pull connector off EVAP valve -2-.

- Pull connector off throttle unit -1-.
- Pull connector off charge air sensor -2-.
- Pull off crankcase breather -3-.
- Pull connector off intake air temperature sensor -4-.
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