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

19-8


For coolant G 012 A8 D, use T40007 refractometer to test frost protection
in cooling system.
Recommended mixture ratios:
Vehicles with small cap Frost protection to
Anti-freeze amount
G 012 A8
D
1) Water
1)
-25 C
(-13 F)
-35 C
(-13 F)
40 %

50 % 3.0 ltr.
(3.2 qts.)
3.5 ltr.
(3.7 qts.) 4.0 ltr.
(4.2 qts.)
3.5 ltr.
(3.7 qts.)
1) The quantity of coolant: 7.0 liters (7.4 qts.) can vary depending upon
vehicle options.
- Install lower radiator hose and secure.
- Replace O-ring and install coolant pump drain plug.
Tightening torque: 30 Nm (22 ft lb)

- Screw VAG1274/1 adapter onto coolant expansion tank.
- Attach VAG1274/10 special tool to VAG1274/1 adapter.
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Note:
Ribbed belt for A/C compressor and torque support remains installed.
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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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19-18

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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19-20

Coolant thermostat, removing, installing
and checking


Removing

- Drain coolant Page 19
-4 .

Installing
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.
Tightening torque - Remove bolts -4-, remove connector -3-, O-ring -2- and coolant
thermostat -1-.
- Clean and/or smooth O-ring sealing surface.
- Install coolant thermostat.
- Fill up with coolant Page 19
-6 .
Component
Tightening torque
Connector to pump housing 10 Nm (7 ft lb)
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19-27

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

- Fill up with coolant Page 19
-6 .

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.

Tightening torques

Component
Tightening torques
Condenser to radiator 10 Nm (7 ft lb)
Coolant line to radiator 10 Nm (7 ft lb)
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