2000 AUDI A8 checking oil

13-4


Cylinder block, crankshaft and
flywheel, servicing Notes:

Always replace seals and O-rings.
The engine speed sensor is installed in the
transmission bellhousing with a spacer washer
underneath.
1 -
Main bearing cap bolts
Always replace60 Nm (44 ft lb) + additional 180 (1/2 turn)
2 -
Main bearing caps
Always replace boltsMarking -1- on oil pump sideChecking bearing clearance page 13
-25
3 -
Connecting rod bearing bolts
Always replace30 Nm (22 ft lb) + additional 90 (1/4 turn)When measuring radial clearance, tighten
to 20 Nm (15 ft lb), but do not turn further
Pa
ge 1 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

13-5


4 -
Connecting rod bearings
Do not interchange used bearing shellsConnecting rods, connecting rod bearings
page13
-33

5 -
Piston rings
Checking page 13
-29
6 -
Pistons
Checking page 13
-29
7 -
Crankshaft
Checking page 13
-25
Chain gear for oil pump, removing and
installing page 17
-29

For vehicles with automatic transmission,
always install bushing as pilot for converter Remove bushing using KUKKO 21/2 and
22/1
8 -
Oil passage with seal Always replace seal
9 -
Sealing flange, front
10 -
Bolt 10 Nm (7 ft lb)
11 -
Collar bolt
Pa
ge 2 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

13-6


12 -
Thrust washer
Measuring crankshaft axial clearance
page 13
-25

Only on 4th crankshaft bearing
13 -
Special bolt (12-sided) Always replaceDriveplate: 60 Nm (44 ft lb) + additional
90 (1/4 turn) Dual-mass flywheel: 60 Nm (44 ft lb) +
additional 180 (1/2 turn)
14 -
Dual-mass flywheel or driveplate
Removing and installing page 13
-22
Needle bearing, removing and installing
page 13
-21

15 -
Crankshaft bearing
Axial and radial clearance, checking
page 13
-25

16 -
Bolt
10 Nm (7 ft lb)
17 -
Oil jet To cool pistons
18 -
Seal for rear flange
Pa
ge 4 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

13-31


Checking piston ring end gap
Engine codes AHA, ATQ - Insert ring at right angle from top and slide down into lower cylinder
opening until approx. 15 mm from lower edge of cylinder. Piston ring
End gap, new mm. (in.)
Wear limit mm.
(in.)
1
(compression) 0.35-0.50 mm (0.014-0.020
in.) 1.0 mm (0.039 in.)
2
(compression) 0.50-0.70 mm (0.020-0.028
in.) 1.4 mm (0.043 in.)
3 (oil scraper) 0.25-0.50 mm (0.010-0.020
in.) 0.8 mm (0.031 in.)
Pa
ge 30 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