AUDI A4 2000 B5 / 1.G APB Engine Cooling System Components
A4 2000 B5 / 1.G
AUDI
AUDI
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AUDI A4 2000 B5 / 1.G APB Engine Cooling System Components
Page 5 of 34
19-4
7 -
Retaining bolt
8 -
Nut
Tightening torque: 10 Nm
9 -
Fan ring Clipped into air ducting and secured with
retaining bolt -Item 7 -
10 -
2-pin connector
11 -
Radiator fan (-V7-)
12 -
Connector Black, 3-pinFor radiator fan thermoswitch
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Page 6 of 34
19-5
13 -
Radiator fan thermoswitch (-F18-), 35 Nm
For electric fan
Switching temperatures: Stage 1on: 92...97 Coff: 84...91 C
Switching temperatures: Stage 2
on: 99...105 Coff: 91...98 C
14 -
Seal
Always replace
15 -
Drain screw Tightening torque: 10 Nm
16 -
Top coolant hose Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections
Page 19
-17
Pa
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ponents, removin
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Page 7 of 34
19-6
17 -
Bolt
Tightening torque: 5 Nm
18 -
Mounting rod
19 -
Guard plate
20 -
Bolt Tightening torque: 5 Nm
21 -
Bolt Tightening torque: 5 Nm
22 -
Radiator Removing and installing Page 19
-26
After replacing, replace coolant in complete
system
Pa
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ponents, removin
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Page 8 of 34
19-7
23 -
Nut
Tightening torque: 5 Nm
24 -
Bracket
25 -
Fan ring
26 -
Pressurizing fan
27 -
Bolt Tightening torque: 5 Nm
Pa
ge 8 of 34 Coolin
g system com
ponents, removin
g and installin
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Page 9 of 34
19-8
Cooling system components (on engine,
front), removing and installing
1 -
Connection
For thermostat
2 -
O-ring Always replace
3 -
Thermostat Checking: heat the thermostat in waterStarts to open at about 86 COpening travel: at least 7 mm
4 -
Bolt Tightening torque: 10 Nm
Pa
ge 9 of 34 Coolin
g system com
ponents, removin
g and installin
g
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Page 10 of 34
19-9
5 -
Filler cap
Test with cooling system tester VAG 1274
and adapter VAG 1274/9 Test pressure 1.4...1.6 bar
6 -
O-ring Replace if damaged
7 -
Bolt Tightening torque: 10 Nm
8 -
Expansion tank Carry out leak test of cooling system with
cooling system tester VAG 1274 and
adapter VAG 1274/8
9 -
To rear water line Diagram of coolant hose connections
Page 19
-17
Pa
ge 10 of 34 Coolin
g system com
ponents, removin
g and installin
g
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Page 12 of 34
19-11
15 -
To front coolant line
Diagram of coolant hose connections
Page 19
-17
16 -
Bolt
Tightening torque: 10 Nm
17 -
Bolt Tightening torque: 25 Nm
18 -
Lower coolant line Diagram of coolant hose connections
Page 19
-17
19 -
Oil cooler
20 -
Bolt
Tightening torque: 25 Nm
21 -
Bolt Tightening torque: 10 Nm
22 -
Belt pulley For viscous fan
Pa
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ponents, removin
g and installin
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Page 13 of 34
19-12
23 -
Bolt
Tightening torque: 10 Nm
24 -
Fan wheel for viscous fan
25 -
Viscous fan coupling Note left-hand threadTightening torque only applicable when
using open-end spanner 3312 Tighten to 37 Nm
26 -
Bolt Tightening torque: 25 Nm
27 -
Bracket For viscous fan
28 -
From bottom of radiator Diagram of coolant hose connections
Page 19
-17
Pa
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g system com
ponents, removin
g and installin
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Page 14 of 34
19-13
Cooling system components (on engine,
rear), removing and installing
1 -
To front water hose
2 -
Front coolant line
Diagram of coolant hose connections
Page 19
-17
3 -
Bleeder screw
Tightening torque: 20 Nm
4 -
Coolant hose From auxiliary water pump to front coolant
line
5 -
Auxiliary water pump
6 -
Coolant hose From rear coolant line to auxiliary water
pump
Pa
ge 14 of 34 Coolin
g system com
ponents, removin
g and installin
g
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Page 15 of 34
19-14
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01
7 -
Right coolant line From turbocharger to rear coolant line
8 -
Banjo bolt Tightening torque: 35 Nm
9 -
Coolant temperature sender (-G62-) For engine control moduleIf necessary, release pressure in cooling
system before removing Checking:
10 -
Retaining clip
Check for proper seating
11 -
To heat exchanger
12 -
Rear coolant line Diagram of coolant hose connections
Page 19
-17
Pa
ge 15 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/21/2002 htt
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yp
e=re
pair&id=AUDI.B5.GE05.19.1