1997 AUDI A4 AWM Engine Valve Gear Service Workshop Manual

15-53

- Loosen camshaft sprocket (counter hold with
3036).

- Remove camshaft sprocket.

- To guide oil seal extractor, thread securing bolt for camshaft sprocket -
arrow- into camshaft as far as it will go by hand.
- Adjust inner part of oil seal extractor 2085 two turns (approx. 3 mm)
from outer part and lock in position with knurled screw.

- Lubricate threaded head of oil seal extractor 2085, place it in position
and, exerting firm pressure, screw it into oil seal as far as possible.
- Loosen knurled screw and turn inner part of extractor against camshaft
until oil seal has been extracted.
- Clamp flats of oil seal extractor in vice. Remove oil seal with pliers.
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15-54

Installing

Note:
Do not oil sealing lip of oil seal.

- Place guide sleeve T10071/1 onto crankshaft journal.
- Push sealing ring via guide sleeve onto shaft journal.
- Remove guide sleeve.

- Press in sealing ring with pressure sleeve T10071/3 and bolt T10071/4.
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15-55


- Install camshaft sprocket.

Note correct installation position: Narrow web of camshaft sprocket
faces outward -arrows- and marking for No. 1 is visible from front.
- Install securing bolt for camshaft sprocket (use counter hold tool 3036).

Note:
If a piston is at TDC the valves could strike the piston when turning the
camshaft. To avoid damage to valves and pistons the pistons must not be
at TDC. - Align markings on camshaft sprocket with marking on cylinder head
cover.
- Align marking on vibration damper with marking on lower part of
toothed belt guard.
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15-56

- Install toothed belt (adjust valve timing) Page
13
-44
.

Note:
Observe all instructions on removing and
installing the toothed belt Page 13
-40
.

Tightening torque

Component

Nm
Camshaft sprocket to camshaft 65
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15-57

Intake camshaft seal, replacing


Special tools and equipment

Oil seal extractor 2085

Installation tool 3241
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15-58

Removing

Cylinder head installed
Lock carrier must be in service position
Page 13
-1 .

- Remove engine cover -arrows-.
- Remove upper toothed belt guard Page 13
-35
.

- Disconnect connector from camshaft position sensor -arrow-.
- Remove sensor housing.
- Remove sensor rotor and washer.
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15-59


- Insert camshaft sprocket bolt 2085/1 by hand into camshaft as far as it
will go.
- Adjust inner part of oil seal extractor 2085 two turns (approx. 3 mm)
from outer part and lock in position with knurled screw.

- Lubricate threaded head of oil seal extractor 2085, place it in position
and, exerting firm pressure, screw it into oil seal as far as possible.
- Loosen knurled screw and turn inner part of extractor against camshaft
until oil seal has been extracted.
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15-60

Installing

Note:

Production variations may have the shaft
sealing rings with ring spring or PTFE sealing
rings used at the intake camshaft.

Installing PTFE sealing ring:
Difference: The regular shaft sealing ring has only one sealing lip -
arrow 1- which is tensioned by a spring. The PTFE sealing ring has a
thread-like sealing area -arrow 2- but no spring. When installing, the sealing surface of the PTFE sealing ring must not
be stretched. For this reason it is not permitted to install the PTFE
sealing ring together with the guide sleeve for sealing rings with
spring. The PTFE sealing rings must be aligned to the rotation direction of the
shaft (see arrow marking on sealing ring). The wrong rotation direction
causes oil leakage.

Note:
Do not oil sealing lip of oil seal. - Check edge of chamfer -arrow- on shaft end of intake camshaft for
burrs or sharp edges. If necessary, smooth edge with an oil stone.
- Push PTFE sealing ring carefully onto shaft end by hand.
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