AUDI A4 1995 B5 / 1.G AWM Engine Cooling System Components Owner's Manual

19-18

Coolant thermostat, removing and
installing, checking


Removing

- Observe or obtain radio code on vehicles with
coded radio.

- Disconnect Ground strap at battery with ignition
switched off.

- Drain coolant Page 19
-4 .

Note:
Connector -2- remains plugged in. - Remove air duct hose -1-.

- Loosen ribbed belt by turning tensioner in direction of arrow.
- Remove ribbed belt from Generator pulley.
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19-19


- Secure pulley for viscous fan with pin punch -1- and unfasten using
Allen key -2-.
- Remove viscous fan from mounting and place in front of radiator cowl.
- Disconnect wiring from rear of Generator.
- Loosen connections for Generator from top and bottom and remove
Generator.

- Remove intake line support -arrows-.
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19-20


Installing
Installation is carried out in the reverse order of removal; note the
following:
Note:
Always replace seals and gaskets. - Release clip and disconnect coolant hose from connection -2-.
- Remove bolts -1- remove connection, O-Ring -3- and coolant
thermostat -4-.
- Clean and smooth down sealing surface for O-ring as required.
- Lightly coat new O-ring with coolant G 012 A8 D.
- Insert coolant thermostat.

Installation position: Cross-piece on thermostat should be vertical.
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19-21

- Install viscous fan Page 13
-21
.

- Install ribbed belt and tensioner for ribbed belt
Page 13
-20
.

- After connecting battery, enter anti-theft code for
radio.

Radio operating instructions
- Close windows fully using power window
switches.

- Actuate all power window switches again for at
least one second in the "close" direction to
activate automatic open/close function.

- Set clock to correct time.

- Top up coolant Page 19
-7 .
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19-22

Tightening torques

Component

Nm
Connection to cylinder block 15
Support for intake manifold
to intake manifold 20
to bracket 20
Generator at bracket
M8 23
M10 46
Hose clamps for air duct hoses
3.5

Check coolant thermostat

- Heat thermostat in water bath.

Starts to
open
Fully open
Opening
travel
approx. 87 C
approx. 102 C
1)
at least 8 mm

1) cannot be tested
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19-23

Lower coolant line, removing and
installing


Special tools and equipment

Removing
VAG 1921
- Drain coolant Page 19
-4 .

- Disconnect coolant hoses -1- and -3-.
- Unbolt coolant expansion tank -2- (-arrows-).
- Disconnect electrical wiring to coolant level display switch -F66- on
underside of expansion tank.
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19-24


Note:
Connector -2- remains plugged in. - Remove air duct hose -1-.

- Disconnect heater hose at rear of coolant line -2-. To do this, release
retaining clip on connecting flange.
- Pull off coolant hose to oil cooler -4- at coolant line.
- Remove bolt -3-.
- Push lower coolant line toward rear of vehicle and remove.
- Remove plug -5- if necessary.
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19-25

Installing
Installation is carried out in the reverse order of
removal; note the following:

Note:
Always replace seals and gaskets.

- Before installing, clean and smooth down
sealing surface for O-ring.

Tightening torques - Moisten new O-ring -1- with G 012 A8 D coolant and slide onto coolant
line -2-.
- Push coolant line into opening in cylinder block.
- Top up coolant Page 19
-7 .
Component

Nm
Coolant line to oil filter bracket 20
Hose clamps for coolant hoses
2
Hose clamps for air duct hoses
3.5
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19-26

Radiator, removing and installing


Special tools and equipment

Removing
Repair Manual, Body Exterior, Repair Group 63

VAG 1306
- Remove front bumper:

- Remove air cowl in front of charge air cooler -arrows-.
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19-27


WARNING!
Hot steam can escape when opening the cap on the expansion tank:
Cover cap with a cloth and open carefully. - Disconnect cooling lines for power steering hydraulic fluid -arrows-.
- Open cover of coolant expansion tank
- Place drip tray VAG 1306 below engine.

- Turn drain screw -arrow- on radiator counter-clockwise. If necessary,
install a drain hose on connection.
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