transmission AUDI A4 1998 B5 / 1.G AEB ATW Engines Exhaust System Components Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1998, Model line: A4, Model: AUDI A4 1998 B5 / 1.GPages: 35, PDF Size: 0.46 MB
Page 5 of 35

26-4
CAUTION!
Part numbers are listed here for reference only.
Always check with your Parts department for
the latest information. 12 -
Heated Oxygen Sensor (HO2S)
50 Nm (37 ft lb)Only grease threads with "G 052 112 A3."
Do NOT allow grease to get into slots on
sensor body
Checking Repair Manual, 1.8 Liter 4-Cyl. 5V
Turbo Fuel Injection &Ignition, Repair Group 24
13 -
Nut
Always replace25 Nm (18 ft lb)
14 -
Bolt 25 Nm (18 ft lb)
15 -
16Mount
Different versions for manual and automatic
transmissions Manual transmission Page 26
-12
, Fig.
1
Automatic transmission Page 26
-13
,
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Page 11 of 35

26-8
7 -
Heated Oxygen Sensor (HO2S)
50 Nm (37 ft lb)Only grease threads with "G 052 112 A3."
Do NOT allow grease to get into slots on
sensor body Checking Repair Manual, 1.8 Liter 4-Cyl.
5V Turbo Fuel Injection &Ignition, Repair
Group 24 Disconnect Heated Oxygen Sensor
(HO2S) harness connector Page 26
-21
8 -
Nut
Always replace25 Nm (18 ft lb)
9 -
Bolt 25 Nm (18 ft lb)
10 -
Mount
Different versions for manual and automatic
transmissions Manual transmission Page 26
-12
, Fig.
1
Automatic transmission Page 26
-13
,
Fig. 2
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Page 17 of 35

26-12
Fig. 1 Individual mounting components for vehicles with manual
transmission
1 - Buffer
2 - Spacer sleeve
3 - Washer
4 - Strap, right
5 - Washer
6 - Bolt (25 Nm/18 ft lb)
7 - Spacer sleeve
8 - Strap, left
9 - Compression spring
10 - Bolt (25 Nm/18 ft lb)
11 - Self-locking nut (25 Nm/18 ft lb)
Pa
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ponents, removin
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p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.GE02.26.1
Page 18 of 35

26-13
Fig. 2 Individual mounting components for vehicles with
automatic transmission
1 - Washer
2 - Buffer
3 - Strap
4 - Spacer sleeve
5 - Bolt (25 Nm/18 ft lb)
6 - Bolt
7 - Washer
8 - Compression spring
9 - Spacer sleeve
10 - Self-locking nut (25 Nm/18 ft lb)
Fig. 3 Double clamp installation position
- Install double clamp so bolt ends do not project over lower edge of
double clamp.
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Page 29 of 35

26-22
- Remove air guide duct between cowl and air
cleaner housing.
- Remove air cleaner housing cover.
- Remove the following lines/harness connectors:
1 - At wastegate bypass regulator valve -N75-
2 - At Evaporative Emissions (EVAP) purge regulator valve -N80-
3 - At power output stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
- Pull off hose connections and remove air cleaner housing (arrows).
- Remove Heated Oxygen Sensor (HO2S) from Three Way Catalytic
Converter (TWC).
- Remove bolts between front exhaust pipe and Three Way Catalytic
Converter (TWC).
- Unbolt transmission mount for exhaust system at exhaust system.
- Remove bolts between three Three Way Catalytic Converter (TWC)
and turbocharger.
- Remove Three Way Catalytic Converter (TWC) toward top.
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Page 30 of 35

26-23
Installing
Installation is the reverse of removal, noting the
following:
Only grease threads of oxygen sensor with
"G 052 112 A3." Do NOT allow grease to get
into slots on sensor body.
Align exhaust system free of stress Page 26
-24
.
Tightening torques
Components
Tightening
torques
Front exhaust pipe to three way
catalytic converter 25 Nm (18 ft
lb)
Front exhaust pipe to
transmission mount 25 Nm (18 ft
lb)
Three way catalytic converter to
turbocharger 30 Nm (22 ft
lb)
Heated oxygen sensor to three
way catalytic converter 50 Nm (37 ft
lb)
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11/18/2002 htt
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yp
e=re
pair&id=AUDI.B5.GE02.26.1