oil AUDI A8 1998 D2 / 1.G AHA ATQ Engines Lubrication System Components Owner's Manual

17-20


Checking chain tensioner - Remove oil pan (lower part) page 17
-10
.

- Insert screwdriver between chain and chain tensioner and lift against
chain tensioner.
If no spring tension is evident and chain is not under tension, chain
tensioner is damaged and must be replaced.
- Before replacing chain tensioner, remove front oil seal carrier page
17
-26
.
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17-21


- Unbolt bracket for oil supply lines (arrows) and pull front oil supply line
(longer line) down and remove.

-
Using Torx T45, unbolt chain sprocket from oil pump and pull off oil
pump.
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17-22


Installing
Installation is the reverse of removal, noting the following:
Note:
Do not use glue or sealant. - Remove oil pump together with shorter oil supply line.
- Before installing oil pump, install short oil supply line together with O-
rings into pump and into oil pan (upper part).
- Clean both sealing surfaces on oil pan (lower part) so they are free of
oil and grease.
- Install new gasket on oil pan (lower part) and attach to oil pan (upper
part) with two bolts diagonal to each other.
- Tighten all bolts hand tight.
- Starting in the center and moving toward the outside, tighten bolts to 10
Nm (7 ft lb).
- Install new seal on oil drain plug and tighten to 30 Nm (22 ft lb).
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17-23

Tightening torques

Component

Tightening
torque
Oil pan to cylinder block M6 10 Nm (7 ft lb)
M8 20 Nm (15 ft
lb)
Oil pan (lower part) to oil
pan (upper part) M6 10 Nm (7 ft lb)
Oil pan to transmission M8 25 Nm (18 ft
lb)
M10 45 Nm (33 ft
lb)
Coolant line to oil pan 10 Nm (7 ft lb)
Oil drain plug in oil pan
(lower part) 30 Nm (22 ft
lb)

Component

Tightening
torque
Dipstick tube to cylinder
head M6
M8 10 Nm (7 ft lb)
25 Nm (18 ft
lb)
Oil pump to engine block 25 Nm (18 ft
lb)
Oil supply line for oil pump 10 Nm (7 ft lb)
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to oil pan (upper part)
Oil seal carrier, front M6 10 Nm (7 ft lb)
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17-24


Component

Tightening torque
Collar screw M8 30 Nm (22 ft lb)
Stabilizer bracket to subframe 1) 25 Nm (18 ft lb)
Coolant drain plug to engine 20 Nm (15 ft lb)
Torque support stop to bracket on engine
25 Nm (18 ft lb)
Engine mount to subframe 25 Nm (18 ft lb)
Torque support to front side of oil pan 25 Nm (18 ft lb)
Engine mount to engine support 25 Nm (18 ft lb)
Chain sprocket to oil pump 25 Nm (18 ft lb)
1) Replace all self-locking nuts after removal.
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17-26

Front oil seal carrier and oil pump chain,
removing and installing


Removing

- Remove ribbed belt page 13
-8 .

- Remove toothed belt page 13
-12
.

- Remove oil pan (upper part) and oil pan (lower
part) page 17
-10
.

- Before removing front oil seal carrier, remove following components:
1 - Toothed belt tensioner roller
Tightening torque: 20 Nm (15 ft lb)
2 - Idler roller
Tightening torque: 45 Nm (33 ft lb)
3 - Toothed belt tensioner
Tightening torque: 20 Nm (15 ft lb)
4 - Toothed belt tensioner lever
Tightening torque: 20 Nm (15 ft lb)
5 - Crankshaft center bolt and toothed belt sprocket
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17-27


Replacing oil pump drive chain - Remove front oil seal carrier and remove gasket from front oil seal
carrier (M6 bolts: 10 Nm, 7 ft lb) (Collar screw M8: 30 Nm 22 ft lb).

-
Using Torx T45, unbolt chain sprocket from oil pump and pull off oil
pump.
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17-28


Installing
Installation is the reverse of removal, noting the following:
Note:
Install gasket for front oil seal carrier dry.
Oil pan (upper part) and oil pan (lower part), removing page 17
-10
. - Remove oil pump together with shorter oil supply line.
- Remove oil pump chain sprocket and remove drive chain from
crankshaft page 17
-26
.
- Remove any remaining sealant from front oil seal carrier and if
necessary, from cylinder block.
- Clean sealing surfaces so they are completely free of any oil or grease.
- Tighten bolts for oil seal carrier.
Tightening torque: M6 - 10 Nm (7 ft lb), M8 - 20 Nm (15 ft lb)
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17-29

Oil pump chain sprocket on crankshaft,
removing and installing


Removing
Front sealing flange and oil pump chain,
removing and installing page 17
-26
.

Installing
WARNING!
Wear protective gloves.
Note:
Installation position: wider collar of chain sprocket points toward engine. - Using puller -2-, remove crankshaft chain sprocket, while protecting
crankshaft end with appropriate washer -1-.
-
Warm chain sprocket in 220 C (428 F) oven for approx. 15 minutes.

- Using pliers, install chain sprocket on crankshaft end and slide onto
crankshaft to stop using 30-100 press tube. If necessary, carefully tap
with plastic hammer.
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