1998 AUDI A4 ECU

17-40

Note:
To avoid having to check and adjust wheel
alignment, only loosen the front subframe
mountings and lower the subframe at the front.

- Remove lower section of oil pan.
- Disconnect return lines for turbocharger from upper section of oil pan.

Notes: - Unbolt cover plate -2- for oil pump sprocket.
When loosening bolt -2- securing cover plate, counter-hold at welded
nut. When installing, make sure that the plate engages in position -arrows-.
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17-41


- Unbolt two oil supply lines, and pull longer of two lines downward to
disconnect from upper section of oil pan.

Note:
Two M6 bolts and two M8 bolts are located vertically at rear of oil pan
upper section (in front of joint between engine and transmission). - Unbolt oil pump from engine so that shorter oil supply line can be
disconnected (do not remove oil pump).
- Remove bolts securing upper section of oil pan to transmission.
- Unbolt upper section of oil pan from engine.
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17-43

Note:
The bead of sealant must not be thicker than 3
mm, as otherwise excess sealant may enter the
oil pan and block the strainer in the oil intake line.

Note:
Be particularly careful when applying the sealant around the rear sealing
flange -arrows in illustration-. - Make sure sealing surface is clean and then apply silicone sealant on
sealing surface of oil pan, as shown in illustration. (Illustration shows
position of sealant on cylinder block.)
- Locate oil pan in position immediately, and tighten all bolts securing oil
pan to cylinder block to 5 Nm initially.
- Tighten bolts securing oil pan to transmission to 45 Nm.
- Tighten bolts securing oil pan to cylinder block in diagonal sequence in
2 stages; tighten to 10 Nm when tightening second time.
- Tighten M10 bolts securing oil pan to cylinder block to 45 Nm.
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17-44

- Clean both sealing surfaces for lower section of
oil pan; ensure that they are free of oil and
grease.

Note:
Do not use any adhesive or sealant.

- Install new gasket on lower section of oil pan
and install on upper section of oil pan with two
diagonally opposite bolts.

- Tighten all securing bolts hand-tight.

- Tighten bolts to 10 Nm with torque wrench,
working from center outward.

- Install new seal on oil drain plug and tighten to
30 Nm.

Notes:

When installing the upper section of the oil pan
with the engine removed from the vehicle,
ensure that the oil pan is positioned flush with
the cylinder block at the flywheel end.
The sealant must be left to dry for about 30
minutes after installing the oil pan before engine
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17-50


- Remove lower section of oil pan.

Notes: - Unbolt cover plate -2- for oil pump sprocket.
When loosening bolt -2- securing cover plate, counter-hold at welded
nut. When installing, make sure that the plate engages in position -arrows-.
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17-51


- Unbolt brackets for oil supply lines -arrows- and pull front (longer) oil
supply line away downward.

- Remove bolt securing chain sprocket to oil pump using Torx T45, and
pull sprocket off oil pump.
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17-52


Installing
Install in the opposite order to removing. When installing, note the
following points: - Remove oil pump together with shorter oil supply line.
- Before bolting on oil pump, install short oil supply line into pump and
upper section of oil pan with new O-rings.

Notes: - Bolt on cover plate -2- for oil pump sprocket.
When installing, make sure that the plate engages in position -arrows-.When tightening bolt -2- securing cover plate, counter-hold at welded
nut.
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17-53

- Clean both sealing surfaces for lower section of
oil pan; ensure that they are free of oil and
grease.

Note:
Do not use any adhesive or sealant.

- Install new gasket on lower section of oil pan
and install on upper section of oil pan with two
diagonally opposite bolts.

- Tighten all securing bolts hand-tight.

- Tighten bolts to 10 Nm with torque wrench,
working from the center outwards.

- Install new seal on oil drain plug and tighten to
30 Nm.

- Fill up engine oil.

Repair Manual, Maintenance


- Install subframe.

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