dimensions AUDI A8 1998 D2 / 1.G AHA ATQ Engines Valve Gear Service Manual

15-43


Valve dimensions

WARNING!
Valves must not be refaced by cutting or grinding.Only hand lapping is permitted.Dimension
Intake valve
Exhaust valve
Diameter -a- 26.8 - 27.0 mm
(1.055 - 1.063 in.) 29.8 - 30.0 mm
(1.173 - 1.181 in.)
Diameter -b- 5.96 - 5.97 mm
(.2346 - .2350 in.) 5.94 - 5.95 mm
(.2338 - .2342 in.)
Length -c- 104.84 - 105.34 mm
(4.1275 - 4.1472 in.) 103.64 - 104.14 mm
(4.0803 - 4.0999 in.)
Angle -a-
45
45
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15-54

Minimum dimensions
Outer intake
valve Center intake
valve Exhaust valve
32.2 mm
(1.268 in.) 33.2 mm
(1.307 in.) 33.0 mm (1.299
in.)
The measured distance minus the minimum
dimension equals the maximum permissible
refacing dimension.

Example
Outer intake valve
Measured distance 33.0 mm (1.299
in.)
Minimum dimension - 32.2 mm (1.268
in.)
Maximum permissible refacing
dimension = 0.8 mm (0.031
in.)

Note:
If the measured distance is less than the
minimum dimension, repeat the measurement
with new valves, or replace the cylinder head.
Pa
ge 62 of 62 Valve
gear, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE03.15.1