oil AUDI A4 1996 B5 / 1.G AWM Engine Valve Gear Service Workshop Manual

15-40


7 -
Valve springs
Removing and installing Page 15
-77
8 -
Valve spring plate
9 -
Valve keepers
10 -
Hydraulic valve lifter
Checking Page 15
-74
Removing and installing Page 15
-77
Do not interchangeStore with cam contact surface downwardBefore installing check camshaft axial
clearance Page 15
-48

Oil contact surface
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15-50


Exhaust camshaft oil seal, replacing

Special tools and equipment

Oil seal extractor 2085
Holding tool 3036
Assembly tool T10071
Socket head fastener T10092
Pin T40011
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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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15-57

Intake camshaft seal, replacing


Special tools and equipment

Oil seal extractor 2085

Installation tool 3241
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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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15-61

Installing sealing ring with spring:

Note:
Do not oil sealing lip of oil seal.

All models: - Place guide sleeve 3241/2 onto camshaft journal.
- Slide oil seal over guide sleeve.

Tightening torques - Press in sealing ring with pressure sleeve 3241/1 as far as it will go. To
do this use bolt 3241/3.
- Install camshaft position sensor Page 15
-46
.
- Install toothed belt guard (upper section).
- Install lock carrier Page 13
-1 .
Component

Nm
Camshaft position sensor rotor to camshaft 25
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15-69

- Position camshafts together with drive chain and
camshaft adjuster on cylinder head.

- Oil running surfaces of both camshafts.

Note:

Dowel sleeves for bearing caps and camshaft
adjuster must be located in cylinder head.
When installing bearing caps ensure that the
identification mark is readable from the intake
side of the cylinder head.

- Tighten mountings of camshaft adjuster (watch
position of dowel sleeves).

- Tighten bearing caps 2 and 4 of intake and exhaust camshafts in
stages and in diagonal sequence (watch position of dowel sleeves).
- Install two bearing caps next to chain sprockets on intake and exhaust
camshafts.
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15-74

Hydraulic valve lifters, checking


Special tools and equipment

Feeler gauge
Wood or plastic wedge

Note:
Hydraulic valve lifters cannot be adjusted or
repaired.
Irregular valve noise during starting is normal.

Test sequence

- Start engine and let run until coolant
temperature has reached approx. 80 C.

- Increase engine speed to about 2500 rpm for 2
minutes (perform road test if necessary).

Note:
If the irregular valve noises stop but recur
repeatedly during short journeys, a new oil
retention valve must be fitted. Oil retention valve
location: In oil filter bracket -Item 6 -, Page
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