oil AUDI A6 1999 C5 / 2.G AHA ATQ Engines Lubrication System Components User Guide

17-9

Oil check valve, replacing


Note:
If irregular valve noise occurs repeatedly during
short periods of driving and disappears after
extended periods of driving, the oil check valves
must be replaced.

- Remove intake manifold.

Tightening torque: 10 Nm (7 ft lb)

- Remover cover under intake manifold.

Tightening torque: 10 Nm (7 ft lb)

Note:
The opening also contains distribution line -2- for supplying jets for piston
cooling. - Replace oil check valves -1-.
Tightening torque: 25 Nm (18 ft lb)
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17-10

Oil pan (upper part) and oil pan (lower
part), removing and installing


Special tools and equipment

Drill with plastic brush attachment
Sealant D 454 300 A2
Torque wrench 10 Nm - 45 Nm

- Switch ignition off and disconnect battery
Ground (GND) strap.

CAUTION!

Before disconnecting the battery, determine
the correct coding for the anti-theft radio.

- Withdraw dipstick.

- Unbolt dipstick tube at right-front of cylinder
head, pull up and remove.

- Remove noise insulation panel (arrows).
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17-11

Lock carrier in service position page 13
-1

- Open engine coolant expansion tank cap.

- Place VAG1306 drip tray beneath engine.

- Turn radiator drain plug counterclockwise (arrow). If needed, attach
tube to connection flange.

Collect engine oil in appropriate receptacle.
Vehicles with automatic transmission - Open coolant pump bearing housing drain plug as well (arrow).
- Drain engine coolant.
- Drain engine oil.
- Unbolt oil cooler line bracket from right-side of oil pan.
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17-12


- Set 10-222A engine support bridge together with 10-222A/3 engine
support adapter on fender mounting edges.
- Attach 2024A engine sling to mounting eyes at front and rear of engine.
- Using 10-222A engine support bridge spindle, lift up engine as far as
possible.

- Cut tie wraps (arrows), open bracket for starter wiring and remove
wiring.
- Remove torque support at front of engine.
- Unbolt coolant line at front of engine from oil pan.
- Disconnect harness connector from oil pressure switch on left-side of
oil pan.
- Disconnect coolant lines from oil cooler underneath oil filter.
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17-14


- Remove oil pan (lower part) and oil pan (upper part).

- Unbolt both oil supply lines. Pull longer of two lines down and off oil
pan (upper part).
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17-15


Note:
Two M6 and two M8 bolts are installed vertically in rear of oil pan (upper
part) in front of connection between engine and transmission. - Unbolt oil pump from engine to allow removal of shorter oil supply line
(do not remove oil pump).
- Remove bolts between oil pan (upper part) and transmission.
- Unbolt oil pan (upper part) from engine.
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17-16

Installing
Installation is the reverse of removal, noting the
following:

- Clean sealing surfaces so they are completely
free of any oil or grease.

WARNING!

Wear protective glasses.

Note:
After applying silicon sealant D 454 300 2, oil pan must be installed within
5 minutes. - Using rotating plastic brush, remove any remaining sealant from oil
pan.

Note:
Sealant must not be thicker than 3 mm, otherwise excess sealant may get
into the oil pan and clog the oil intake strainer. - Cut tube jet at front marking (jet diameter approx. 3 mm).
Thickness of sealant: 2-3 mm (0.04-0.12 in.)
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17-17


Note:
Be especially careful when applying sealant to rear oil seal carrier (arrows
in illustration A17-0041).
Note:
Do not use glue or sealant. - Apply silicon sealant to clean sealing surface as shown in illustration.
(The illustration shows placement of sealant on cylinder block.)
- Immediately install oil pan and tighten all bolts between oil pan and
engine block to 5 Nm (44 in. lb).
- Tighten bolts between oil pan and transmission to 45 Nm (33 ft lb).
- Tighten bolts between oil pan and engine block in 2 stages in diagonal
sequence.
Finally sequence tightening torque: 15 Nm (11 ft lb)
- Tighten M10 bolts between oil pan and cylinder block to 45 Nm (33 ft
lb).
- 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.
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17-18

- Starting in center and moving toward outside,
tighten bolts to 10 Nm (7 ft lb).

- Install new seal on oil drain plug and tighten to
30 Nm (22 ft lb).

Notes:

When installing oil pan on removed engine,
make sure oil pan is aligned with cylinder block
on flywheel side.
After installing oil pan, allow sealant to dry for
approx. 30 minutes. Only after allowing sealant
to dry may engine oil be added.

- Install subframe.

Repair Manual, Suspension, Wheels,
Steering, Repair Group 40


- Install lock carrier.
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17-19

Oil pump, removing and installing


- Remove noise insulation panel (arrows).
- Drain engine oil.
- Collect engine oil in appropriate receptacle.

Vehicles with automatic transmission - Unbolt both stabilizer mounting brackets -2- from subframe.
- Lower stabilizer not more than 10 cm (3.94 in.) and secure using wire.
- Unbolt oil cooler line bracket from right-side of oil pan.
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