dimensions AUDI A4 1997 B5 / 1.G AEB ATW Engines Valvetrain Servicing Workshop Manual
Page 8 of 51
15-37
19 -
Hydraulic chain tensioner
Before removing, secure with VAG3366
chain tensioner bracket Removing and installing Page 15
-50
Seal contact surfaces between hydraulic
chain tensioner and cylinder head Page 15
-9 , Fig. 4
20 -
Rubber/metal seal
Replacing Page 15
-53
21 -
Gasket
Always replace
22 -
Exhaust valve Sodium-filledFollow disposal procedures for sodium-
filled valves Page 15
-40
Do not reface by grinding, only hand
lapping is permitted Valve dimensions Page 15
-39
, Fig. 1
Checking valve guides Page 15
-66
Refacing valve seats Page 15
-71Pa
ge 8 of 51 Valvetrain, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.3
Page 9 of 51
15-38
23 -
Intake valve
Do not reface by grinding; only hand
lapping is allowed Valve dimensions Page 15
-39
, Fig. 1
Checking valve guides Page 15
-66
Refacing valve seats Page 15
-71
24 -
Oil seal
For intake camshaftReplacing Page 15
-42
25 -
Shutter wheel for Camshaft Position
(CMP) sensor -G40-
Note position: insert lug in camshaft notch
26 -
Washer ConicalNote position
27 -
Bolt 25 Nm (18 ft lb)
28 -
Camshaft Position (CMP) sensor -G40-
housing
29 -
Bolt 10 Nm (7 ft lb)
Pa
ge 9 of 51 Valvetrain, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.3
Page 10 of 51
15-39
WARNING! Fig. 1 Valve dimensions
Valves must not be refaced by cutting or grinding.Only hand lapping is permitted.Dimension
Intake valve
Exhaust valve
Diameter -a-
mm
(in.) 26.80-27.00(1.055-
1.063) 29.80-30.00(1.173-
1.181)
Diameter -b-
mm
(in.) 5.95-5.97
(0.2339-0.2350) 5.94-5.95
(0.2339-0.2343)
Length -c- mm
(in.) 104.84-105.34
(4.127-4.147) 103.64-104.14
(4.080-4.099)
Angle -a-
45
45
Pa
ge 10 of 51 Valvetrain, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.3
Page 49 of 51
15-72
Determining maximum allowable refacing
dimension
- Insert valve and press tightly against valve
seat.
Note:
If valve is replaced during repair, use new valve
for measurement.
- Measure distance between end of valve stem
and camshaft center axis (camshaft center axis
is located at the level of cylinder head upper
edge).
- Determine maximum allowable refaced
dimension using distance measured and
minimum dimension.
Minimum dimensions
Outer intake
valves Center intake
valve Exhaust
valves
34.0 mm
(1.338 in.) 33.7 mm
(1.236 in.) 34.4 mm
(1.354 in.)
Pa
ge 49 of 51 Valvetrain, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.3