coolant AUDI A4 1997 B5 / 1.G APB Engine Lubrication System Components Workshop Manual

17-9


6 -
Hex socket head bolt M8
Tightening torque: 20 NmThe coolant drain screw is next to this bolt
7 -
Hex bolt M6 Tightening torque: 10 Nm
8 -
O-ring Always replace
9 -
Gasket for lower section of pan Sealing surfaces should be clean and dry
10 -
Oil drain plug Tightening torque: 30 Nm
11 -
Seal for oil drain plug Always replace
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17-12

Oil check valves, replacing


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

All cable ties which are released or cut open
when removing the engine must be replaced in
the same position when installing the engine.
Catch drained-off coolant in a clean container
for re-use or disposal.
Replace all gaskets and seals.

Removing

- Remove bolts -arrows- and remove engine cover panels -A...C-.
- Remove cover above air cleaner.
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17-13


Repair Manual, Body Exterior, Repair Group 63

Repair Manual, Body Exterior, Repair Group 50 - Remove noise insulation -arrows-.
- Drain coolant Page 19
-19
- Remove bumper- Move lock carrier to service position

Note:
Viscous fan has left-hand thread. - Remove viscous fan (counter-hold with pin wrench 3212).
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17-14

- Mark direction of rotation of ribbed belt.

Note:
Mark direction of rotation of ribbed belt. The belt can break if it runs in the
opposite direction when reinstalled. - To slacken ribbed belt, turn to the right using a 17 mm ring spanner
until the two holes are aligned with each other -arrow- and hold in
position with mandrel 3204.
- Take off ribbed belt.

- Disconnect water hoses -1- and -2-.
- Remove coolant reservoir (arrows).
- Disconnect connector for coolant level monitor.
- Remove cover panel from cylinder head cover (cylinder bank 4-6).
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17-23


- Unbolt rear left toothed belt guard -arrows-.
- Detach intake manifold using special tool 3249.

- Unbolt cylinder head lifting bracket with coolant line -arrows- from
cylinder head.
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17-24


- Unbolt coolant line at front of cylinder head -arrows- and remove.
- Remove water line and auxiliary water pump.
- Remove cover on oil check valves.

Note:
The oil distribution line -2- for the spray jets for piston cooling is also
located in the opening. - Replace oil check valves -1- (25 Nm).
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17-25

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

- Install lock carrier

Repair Manual, Body Exterior, Repair Group
50


- Install bumper

Repair Manual, Body Exterior, Repair Group
63


- Fill with coolant Page 19
-19
.

Component

Nm
Bolts M6 10
Bolts M8 20
Toothed belt sprocket to camshaft 55
Intake manifold to cylinder head 10
Oil check valves 25
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17-33

- Unbolt dipstick guide tube at front of cylinder
head (right side), and pull out of oil pan from the
top.

Repair Manual, Body Exterior, Repair Group 63

Repair Manual, Body Exterior, Repair Group 50
WARNING!
Hot steam can escape from the expansion tank when the filler cap is
opened. Cover the filler cap with a cloth and remove it carefully. - Remove noise insulation panel -arrows-.
- Remove bumper.
- Move lock carrier to service position.- Remove cap on coolant expansion tank.
- Place drip tray VAG 1306 below engine.

- Turn drain screw -arrow- on radiator anti-clockwise, if necessary install
drain hose to connection.
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- Also open coolant drain screw -arrow- at rear right of oil pan.
- Draining off and filling up coolant Page 19
-19
.
- Drain off engine oil.
Use a separate container to collect the engine oil.

- Set up support bracket 10-222A with adapter 10-222A/3 on bolted
flanges for wing panels.
- Attach support bracket to front and rear lifting eyes on engine.
- Raise engine as far as possible with spindles of support bracket.
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- Cut open cable ties -arrows-, open retainer for starter cable and take
out cable.
- Unbolt torque reaction support at front of oil pan.
- Unbolt coolant line from oil pan.
- Disconnect connector from oil pressure switch on left of oil pan.

- Remove torque reaction support -1-.
- Release hose clamps -arrows-.
- Remove water line -2-.
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