weight AUDI A8 1998 D2 / 1.G AHA ATQ Engines Cylinder Block Crankshaft And Flywheel Component Service Manual

13-25

Crankshaft axial and radial clearance,
measuring


Axial clearance

CAUTION!

Bearing shells must be reinstalled in their
original location and orientation. Always label
the bearing shells according to their installed
position before removing. Never interchange
used bearing shells.

- Attach dial indicator together with VW387 dial indicator holder to oil
pump and set indicator against crankshaft counterweight.
- Press crankshaft against dial indicator by hand and set indicator to
zero.
- Press crankshaft away from dial indicator.
- Read gauge.
Clearance when new
Wear limit
0.07-0.23 mm (0.0028-0.0091 in.) 0.25 mm (0.0098 in.)
Pa
ge 24 of 33 C
ylinder block, crankshaft and fl
ywheel, 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.GE03.13.2

13-32

Cylinder bore, checking


Piston and cylinder bore dimensions
Engine codes AHA, ATQ
Note:
Replacement pistons are only available in the basic dimension.
CAUTION!
DO NOT measure cylinder bore dimensions while the cylinder block
is mounted on the engine stand. The cylinder block is stressed and
deformed by its own weight under these conditions and the
measurements will not be accurate. - Measure at three locations diagonally in crosswise direction -A- and
lengthwise direction -B-.
Inner bore gauge: 50-100 mm (1.96-3.94 in.)
Deviation from nominal size: max. 0.08mm (0.0031 in.)Reconditioning
dimension Piston diameter
Cylinder bore
diameter
Basic dimension 82.48 mm (3.2472
in.) 82.51 mm (3.2484
in.)
1st oversize 82.74 mm (3.2575
in.) 82.76 mm (3.2578
in.)
Pa
ge 31 of 33 C
ylinder block, crankshaft and fl
ywheel, 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.GE03.13.2