1998 AUDI A4 ECU

17-5


19 -
Oil temperature sender (-G8-), tightening
torque 10 Nm
For oil temperature gaugeWhiteIf seal is leaking, cut open with pliers and
replace.
20 -
Oil seal Replacing Page 15
-10
21 -
Tensioner
Secure in position before removing Fig.
1

22 -
Bolt, tightening torque: 10 Nm
Apply locking fluid D6 when installing
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17-7


Notes: Fig. 1 Securing tensioner in position before removing
- Using a hex key, turn toothed belt tensioning roller -1- clockwise 8 mm
in direction of arrow until tensioning lever -2- compresses tensioner -3-
far enough to enable a 2 mm dia. spring pin to be inserted in drilling
and in plunger.
The toothed belt tensioner is oil-damped and can only be compressed
slowly by applying gradual pressure. Use spring pin from 2024 A.
- Insert spring pin and release toothed belt tensioning roller.
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17-17


Notes: - Release hose clamp -arrow-.
- Remove intake line -1-.
All hose connections are secured with clips. Charge air system must be free of leaks.Replace all seals and gaskets.

- Disconnect connector from air recirculation valve -2-.
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17-21


Note:
Turn over the engine at the central bolt on the crankshaft. - Turn crankshaft to TDC by hand. Marks -A- and -B- must be aligned.
- Check position of camshafts: larger holes in securing plates on
camshaft sprockets must align opposite one another on inside. If this is
not the case, turn crankshaft one revolution further.
- Remove sealing plug from cylinder block, left.
The TDC drilling in the crankshaft must be visible (or able to be felt) in
line with the sealing plug hole.

- Screw clamping bolt 3242 for crankshaft into sealing plug hole and
tighten.
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17-22

Notes:

Mark the direction of rotation of the toothed belt
with chalk or felt pen before removing. A used
belt can break if it rotates in the wrong direction
when reinstalled.
The toothed belt tensioning element is oil-
damped and can therefore only be compressed
slowly by applying constant pressure.

- Using a hex key, turn toothed belt tensioning roller -1- clockwise 8 mm
in direction of arrow until tensioning lever -2- compresses tensioning
element -3- sufficiently to enable special tool T 400 11 to be installed in
drilling and in plunger.
- Insert special tool T 400 11 and release toothed belt tensioning roller.
- Insert camshaft clamp 3391 in the securing plates of the two
camshafts.
- Loosen both camshaft bolts and remove approx. 5 turns.
- Take out camshaft clamp 3391.

- Pull off both camshaft sprockets with special tool T40001.
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17-28

Installing
Install in the opposite order to removing. When
installing, note the following points:

Note:
Do not use any adhesive or sealant.

- Clean sealing surfaces; ensure that they are free
of oil and grease.

- 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.
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17-36

- Place drip tray VAG 1306 under engine.

- Remove oil filter.

- Release hose clamps -arrows-.
- Remove oil cooler -1-.

- Remove bottom nuts on engine mountings -1- (left and right sides).
- Mark positions of securing points -1- and locating sleeves -2- under
engine mountings on left and right sides.
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17-38


- Remove hex socket head bolt -1- and securing nut -2-. Tightening
torque: 45 Nm
- Loosen bolt -3-. Tightening torque: 22 Nm.
- Take out alternator -4- from below.

1 - Remove air line -1-.
2 - Mounting for oil line and air conditioner lines
3 - Mounting on cylinder block
4 - Release hose clamp
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