2000 AUDI A4 ignition

15-19

- Remove cover panel from cylinder head cover
(cylinder bank 4-6).

- Release hose clamp -arrow-.
- Remove upper section of intake line -1-.
- Disconnect hose -2-.

- Disconnect hose (arrow).
- Remove bolt securing toothed belt guard from cylinder head cover.
- Pull plug connectors off ignition coils.
- Pull crankcase breather off cylinder head cover.
- Remove cylinder head cover.
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15-24


Installing
Install in reverse sequence; note the following points: - Pull off hose -1-.
- Pull plug connectors off ignition coils.
- Pull crankcase breather off cylinder head cover.
- Remove ignition coils.
- Remove cylinder head cover.

- Seal end points of joints between bearing caps and cylinder head.
- Before installing cylinder head cover and gasket, carefully apply a
small quantity of sealant D 454 300 A2 at four end points of sealing
surfaces on cylinder head -arrows-, using a small screwdriver.
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15-26

WARNING!

Fuel system is under pressure. Before
opening the system, place a cloth around the
connection. Then release pressure by
carefully loosening the connection.

- Disconnect fuel supply line and fuel return line -1- and -2-, and move
fuel lines clear.
- Pull hose off EVAP valve -3-.

- Unplug connector -1- from air mass meter.
- Unplug connectors -2- from ignition output stages, and move wiring
clear.
- Remove air cleaner.
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15-28

- Remove bolt securing toothed belt guard from
cylinder head cover.

- Unplug connectors from ignition coils.

- Pull crankcase breather off cylinder head
cover.

- Remove ignition coils.

- Remove cylinder head cover.

Installing
Install in reverse sequence; note the following
points.

- Seal end points of joints between bearing caps and cylinder head.
- Before installing cylinder head cover and gasket, carefully apply a
small quantity of sealant D 454 300 A2 at four end points of sealing
surfaces on cylinder head -arrows-, using a small screwdriver.
Pa
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15-30


- Unplug connector for camshaft timing control -1- (cylinder bank 4..6).
- Unplug connectors from injectors -2- (cylinder bank 4..6).
- Unplug connectors from ignition coils -3- and move wiring harness
clear (cylinder bank 4..6).
- Pull crankcase breather -4- off cylinder head cover (cylinder bank 4..6).
- Remove ignition coils.

- Unplug connectors from injectors -2- (cylinder bank 1..3).
- Pull off hose -5- going to turbocharger intake side.
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15-44


- Unplug connectors from injectors -2- (cylinder bank 4..6).

- Unplug connector for camshaft timing control -1- (cylinder bank 1..3).
- Unplug connectors from injectors -2- (cylinder bank 1..3).
- Unplug connectors from ignition coils -3- and move wiring harness
clear (cylinder bank 1..3).
- Pull crankcase breather -4- off cylinder head cover (cylinder bank 1..3).
- Pull off hose -5- going to turbocharger intake side.
- Remove ignition coils.
Pa
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15-61


- Unplug connector -1- from air mass meter.
- Unplug connectors -2- from ignition output stages, and move wiring
clear.
- Remove air cleaner.

- Remover cover panel from right-hand cylinder head cover -arrows-.
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15-63

- Pull crankcase breathers off cylinder head
covers.

- Pull plug connectors off ignition coils.

- Remove ignition coils.

- Unplug connectors from all 6 injectors.

- Disconnect 5-pin connecter at power output
stage of ignition coils.

- Open throttle fully.

- Use compression tester VAG 1381 or VAG
1763.

- Operate starter until pressure reading on tester
no longer rises.

Compression pressure values

New
Wear
limit Max. permissible difference
between cylinders
9 ... 13
bar 7 bar 3 bar
Pa
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