power steering AUDI TT 1998 8N / 1.G AEB ATW Engines Cooling System Components Workshop Manual

19-13

Coolant pump, removing and installing


Note:
Coolant pump is bolted to bracket for generator,
power steering pump and viscous fan.

Lock carrier in service position Page 13
-1

Removing

CAUTION!

Before disconnecting the battery:

Stop the engine.
Determine the correct coding for the anti-
theft radio.
Switch the ignition off (also applies when
connecting the battery). Failure to do so may
damage the Engine Control Module (ECM).

- Switch ignition off and disconnect battery Ground (GND) strap.
- Remove ribbed belt Page 13
-15
.
- Remove viscous fan (with belt pulley) Page 13
-14
, Fig. 1
.
- Remove V-belt Page 13
-18
.
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19-14

- Drain coolant Page 19
-4 .

- Loosen clamps for coolant hoses -1- and -2-.
- Remove coolant hose to radiator at coolant line.
- Remove intake air duct between intake manifold and charge air cooler.
- Remove mounting bolts for generator.
- Remove generator toward front.
- Disconnect wiring from removed generator.
- Unbolt following supports and braces from bracket for generator, power
steering pump and viscous fan:

Intake manifold support
Support for torque support bracket
Brace to cylinder block (remove completely)

- Remove bracket for generator, power steering pump and viscous fan
bolts -1- through -6-.
- Secure bracket for generator, power steering pump and viscous fan to
left side using wire.
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19-15

Note:
Power steering pump remains installed.

- Pull off coolant hoses from coolant pump and
coolant thermostat housing.

- Unbolt coolant pump housing from toothed belt cover (arrow).
- Remove coolant pump.

- Unbolt impeller housing -1- from pump housing -4-.
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19-16

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

- Clean sealing surfaces of both housings.

- Replace gasket and O-ring.

- Insert T-head bolt into coolant pump bore.

- Mount bracket for generator, power steering pump and viscous fan with
coolant pump on cylinder block and tighten bolts in numerical
sequence.
1 - M8 x 70 bolt
2 - M8 x 110 bolt
3 - M8 x 50 bolt
4 - M8 x 90 bolt
5 - M8 x 70 bolt
6 - M8 x 100 bolt
- Install viscous fan Page 13
-14
, Fig. 1
.
- Install ribbed belt Page 13
-17
.
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19-18

Tightening torques

Component
Tightening
torques
Impeller to pump housing 10 Nm (7 ft
lb)
Pump housing to toothed belt
cover 10 Nm (7 ft
lb)
Bracket for generator, power
steering pump and viscous fan to
cylinder block 25 Nm (18 ft
lb)
Left brace for cylinder
block/bracket for generator, power
steering pump and viscous fan
to cylinder block 25 Nm (18 ft
lb)
to bracket M10 40 Nm (30 ft
lb)
Brace for torque support/bracket
for generator, power steering
pump and viscous fan
to torque support 25 Nm (18 ft
lb)
to bracket 20 Nm (15 ft
lb)
Intake duct support
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19-19

Component
Tightening
torques
Generator to bracket for
generator, power steering pump
and viscous fan
M8 25 Nm (18 ft
lb)
M10 40 Nm (30 ft
lb)
Belt pulley to coolant pump 25 Nm (18 ft
lb)
Viscous fan to bearing 45 Nm (33 ft
lb)
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19-24

Radiator, removing and installing


Special tools and equipment
VAG1306 drip tray

Removing

- Remove front bumper.

Repair Manual, Body Exterior, Repair Group
63


WARNING!
The cooling system is pressurized when the engine is warm. When
opening the expansion tank, wear gloves and other appropriate
protection, cover the cap using a cloth, and open carefully to relieve
system pressure slowly. - Unbolt cooling pipe for power steering hydraulic oil (arrows).
- Place VAG1306 drip tray underneath engine.
- Open coolant expansion tank cap.
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