engine coolant AUDI A4 1998 B5 / 1.G Heating And Ventilation System Servicing Workshop Manual

87-160

- Release pressure in coolant system by opening
cap at coolant expansion tank.

WARNING!

With hot engine, cooling system is under
pressure.
Coolant expansion tank cap must be
removed slowly.

CAUTION! - Clamp coolant hoses -A- and -B- with VAG3094 (or equivalent) and
remove from heater core inlet/outlet.
- Place catch basin below heater core connection -A- and carefully blow
coolant out of heater core with compressed air through connection -B-.
- Remove A/C system vacuum supply hose from engine and attach at
heater core inlet/outlet.
- Remove boot -C-.
Dispose of used coolant properly. Check local regulations.Do not re-use used coolant.
Pa
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g and ventilation s
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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Install refrigerant lines free of stress.Evacuate refrigerant circuit and charge system with refrigerant R134a
page 87
-204
.
Fill with fresh coolant/anti-freeze and bleed cooling system Repair
Manual, "General, Engine," Repair Group 19.
Pa
ge 16 of 24 Heatin
g and ventilation s
ystem, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
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pair&id=AUDI.B5.HA01.87.22

87-165

Heater/air conditioner assembly,
removing and installing (1997 )


CAUTION!

Obtain security code for anti-theft radio.
Note customer's pre-set radio stations.
Move power seats to most rearward
position.
Switch off ignition and disconnect battery
ground (GND) strap.

- Release pressure in coolant system by opening
cap at coolant expansion tank.

WARNING!
With hot engine, cooling system is under
pressure.
Coolant expansion tank cap must be
removed slowly.
Dispose of used coolant properly. Check
local regulations.
Pa
ge 17 of 24 Heatin
g and ventilation s
ystem, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.87.22