1998 AUDI A4 AWM Engine Cooling System Components Workshop Manual

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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19-28


- Release coolant hose retaining clip -arrow- and remove coolant hose
from radiator.

- Disconnect coolant hose from top of radiator -arrow-.
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19-29

Vehicles with automatic transmission:

Note:
Observe cleanliness rules when working on the automatic transmission:
Repair Manual, 5 Spd. Automatic Transmission 01V, Repair Group 37

Repair Manual, 5 Spd. Automatic Transmission 01V, Repair Group 37
All models:
CAUTION!
The air conditioner refrigerant circuit must not be opened. - Remove bolts -arrows-.
- Remove air duct -1- and -2-.
- Place drip tray underneath to collect oil.
- Remove ATF lines/hoses from radiator:- Tie ATF lines to longitudinal member to avoid leakage of fluids.
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e=re
pair&id=AUDI.B5.GE06.19.1