belt AUDI A4 1998 B5 / 1.G AWM Engine Valve Gear Service Workshop Manual

15-51

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
.
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15-52


- Set crankshaft to markings for TDC of No. 1 cylinder by turning central
bolt on crankshaft sprocket in direction of rotation -arrows-.

Note:
Only tension piston of tensioner until pressure piston is secured with pin
T40011. - Attach socket head fastener T10092 into tensioner for toothed belt.
- Take toothed belt off camshaft sprocket.
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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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15-58

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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15-61

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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15-63

Removing

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

- Remove engine cover -arrows-.
- Remove combination valve for secondary air inlet Page 26
-64
.

- Disconnect connector -arrow- from camshaft adjuster.
- Remove upper toothed belt guard Page 13
-35
.
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15-64


- Set crankshaft to markings for TDC of No. 1 cylinder by turning central
bolt on crankshaft sprocket in direction of rotation -arrows-.
- Remove cylinder head cover Page 15
-15
.

- Thread socket head fastener T10092 into tensioner for toothed belt.
- Tension pressure piston of tensioner until piston is secured with pin
T40011.
- Remove toothed belt from camshaft sprocket.
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15-72


Note:
When turning the camshaft the crankshaft must not be at TDC. There is a
danger of damage to the valves/piston crown.
Note: - 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.
- Install toothed belt (adjust valve timing) Page 13
-44
.
Observe all instructions on removing and installing the toothed belt
Page 13
-40
.
Wait about 30 minutes after installing the camshafts before starting
the engine. Hydraulic valve compensation elements have to settle
(otherwise valves will strike pistons). After working on the valve gear, turn the engine carefully at least 2
rotations to ensure that none of the valves make contact when the
starter is operated.
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