fuel AUDI TT 1998 8N / 1.G AEB ATW Engines Cylinder Head Remove And Install Workshop Manual

15-4


Repair Manual, 1.8 Liter 5V Turbo Fuel Injection
& Ignition, Repair Group 28 5 -
Gasket
For ignition coilReplace if damaged
6 -
Ignition Coil Check
7 -
Bolt
10 Nm (7 ft lb)
8 -
Oil filler cap
9 -
Gasket Replace if damaged or leaking
10 -
Nut 10 Nm (7 ft lb)
11 -
Cylinder head cover Removing and installing Page 15
-17
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15-6


Part II

1 -
Gasket Always replace
2 -
Nut 10 Nm (7 ft lb)
3 -
Socket-head bolt 10 Nm (7 ft lb)
4 -
O-Ring For injectorAlways replace
5 -
Fuel rail With injectors
6 -
Upper coolant line
7 -
Socket-head bolt 10 Nm (7 ft lb)
8 -
Bolt 10 Nm (7 ft lb)
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15-13


- Unbolt fuel supply rail retaining bolts and disconnect vacuum line at
fuel pressure regulator (arrows).
- Disconnect fuel supply rail with injectors from intake manifold and lay
aside in rear of engine compartment on clean cloth.
- Disconnect coolant hoses at upper coolant line.

- Disconnect upper coolant line at intake line and rear coolant flange at
rear of cylinder head (arrows).
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15-15

Installing
Installation is the reverse of removal, noting the
following:

Note:
Replace gaskets and O-rings.

- Adjust Accelerator Pedal (AP) cable.

Repair Manual, Fuel Supply System, Repair
Group 20


- Top up coolant Page 19
-6 .

CAUTION!

Be sure the ignition is switched OFF. Failure
to do so may damage the Engine Control
Module (ECM).

- Switch ignition off and reconnect battery Ground
(GND) strap.

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

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15-16

- Perform throttle valve control module adaptation
to Engine Control Module (ECM).

Repair Manual, 1.8 Liter 5V Turbo Fuel
Injection & Ignition, Repair Group 24
Tightening torques

Component

Tightening
torques
Intake manifold to cylinder
head 10 Nm (7 ft lb)
Intake manifold brace to intake
manifold 20 Nm (15 ft lb)
Intake manifold to bracket 20 Nm (15 ft lb)
Fuel supply rail to intake
manifold 10 Nm (7 ft lb)
Coolant line to coolant flange 10 Nm (7 ft lb)
Coolant line to intake manifold 10 Nm (7 ft lb)
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15-28

- Install ribbed belt and ribbed belt tensioner
Page 13
-15
.

Note:
When installing ribbed belt, make sure it is
seated correctly on the pulleys.

- Adjust Accelerator Pedal (AP) cable.

Repair Manual, Fuel Supply System, Repair
Group 20


- Replace coolant Page 19
-6 .

CAUTION!

Be sure the ignition is switched OFF. Failure
to do so may damage the Engine Control
Module (ECM).

- Switch ignition off and reconnect battery Ground
(GND) strap.

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

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15-29

- Perform throttle valve control module adaptation
to Engine Control Module (ECM).

Repair Manual, 1.8 Liter 5V Turbo Fuel
Injection & Ignition, Repair Group 24
Tightening torques

Component
Tightening
torque
Intake manifold brace to intake
manifold 20 Nm (15 ft
lb)
Intake manifold brace to bracket 20 Nm (15 ft
lb)
Turbocharger to exhaust
manifold 35 Nm (26 ft
lb)
Turbocharger bracket to
turbocharger (bolt and washer
assembly M8) 40 Nm (30 ft
lb)

Turbocharger bracket to cylinder
block 45 Nm (33 ft
lb)
Retainer straps for oil supply line
to cylinder head 20 Nm (15 ft
lb)

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15-30

Compression, checking


Special tools and equipment

VAG1381 or VAG1763 compression tester
3122B spark plug removal tool

Test condition
Minimum engine oil temperature: 30 C (86
F)

Test procedure

- Remove engine covers.

- Switch ignition off and remove harness
connectors to ignition coils.

- Unbolt ignition coils (arrows).
- Remove all harness connectors to fuel injectors.
- Using 3122B spark plug removal tool, remove all spark plugs.
- Open throttle to Wide Open Throttle (WOT) position.
- Using VAG1381 or VAG1763 compression tester, test engine
compression.
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15-31

- Activate starter until no further pressure
increases are indicated by VAG1381 or
VAG1763 compression tester.

Compression pressure

Engine code
New
Wear limit

AEB 10.0-13.0 bar
(145-188.5 psi) 7.0 bar
(101.5 psi)
Permissible difference between all cylinders: 3
bar (43 psi)

- Install spark plugs and ignition coils.

- Check DTC memory.

Repair Manual, 1.8 Liter 5V Turbo Fuel
Injection & Ignition, Repair Group 01
Note:
Diagnostic Trouble Codes (DTCs) are stored
when harness connectors are disconnected.
After testing, check DTC memory and erase.
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