AUDI A4 1998 B5 / 1.G AWM Engine Cylinder Head Remove And Install User Guide

15-10


- Unplug vacuum hoses -1 to 3-.
- Disconnect connectors as follows:
4 - on intake air temperature sensor -G42-
5 - for throttle valve control module -J338-
- Remove the air duct hose -6- from throttle valve control module.

Note:
The electrical connectors and vacuum hoses do not have to be
disconnected. - Remove retaining plate for recirculation valve for turbocharger -N249- -
1- from underneath intake line and secondary air inlet valve -N112 -2- -
arrows-.
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15-11


- Disconnect connector for Camshaft Position sensor -arrow-.

Note:
Carefully protect the removed injectors from contamination. - Remove retaining bolts for fuel manifold and disconnect vacuum line
from fuel pressure regulator -arrows-.
- Remove fuel manifold together with injectors from intake manifold and
place it on a clean cloth at back of engine compartment.
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15-12

- Disconnect coolant hoses from upper coolant
line.

- Move electrical wiring at top of coolant line
aside.

- Unbolt upper coolant line from intake manifold and coolant flange -
arrows- at back of cylinder head.

- Remove intake line support -arrows-.
- Disconnect hose -1- to ACF valve on intake line.
- Pull out oil dipstick.
- Remove bracket of guide line for oil dipstick.
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15-13

- Remove suction hose from flange and
remove.

Note:
Plug intake ports on cylinder head with clean
cloths.

Installing
Installation is carried out in the reverse order of
removal; note the following:

Note:

All cable ties which are released or cut open
when removing must be located in the same
position when installing.
Hose connections and hoses of charge air
system must be free of oil and grease before
assembling.
Replace seals and gaskets.

- Top up coolant Page 19
-7 .

- After connecting battery, enter anti-theft code for
radio.
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Radio operating instructions
- Close windows fully using window switches.
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15-14

- Actuate all power window switches again for at
least one second in the "close" direction to
activate automatic open/close function.

- Set clock to correct time.

- Perform throttle-valve control module
adaption:

Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel
Injection & Ignition, Engine Code(s): AWM , Repair Group 24


Tightening torques

Component

Nm
Intake manifold to cylinder head 10
Support for intake
manifold to intake
manifold 20
to bracket 20
Fuel manifold to intake manifold 10
Coolant line to coolant flange 10
Coolant line on intake line 10
Hose clamps for coolant hoses
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2
Hose clamps for air duct hoses
3.5
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15-15

Cylinder head cover, removing and
installing


Removing

- Remove engine cover -arrows-.

- Remove air filter cover -arrow-.
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15-16


- Remove bolts -arrows-.
- Remove air ducts -1- and -2-.

- Remove line of crankcase vent -1-.
- Disconnect hose of crankcase venting from cylinder head cover.
- Remove line -1- from combination valve for secondary air inlet on
cylinder head cover and from heat shield -3- (engine code ANB only).
- Slightly swivel secondary air inlet line to side.
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15-17


- Disconnect Ground wire -2-.
- Disconnect connectors -3-.
- Move lines and hoses aside.
- Remove ignition coils -1-.
- Loosen 2 top retaining clamps for toothed belt guard.

- Loosen nuts -arrows- for cylinder head cover and remove cylinder head
cover.
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