belt AUDI A4 2000 B5 / 1.G AEB ATW Engines Cylinder Head Remove And Install Workshop Manual

15-17

Cylinder head cover, removing and
installing


Removing

- Remove engine covers.

- Unbolt crankcase ventilation line from heatshield and cylinder head
cover and disconnect line from front hose (arrows).
- Swing crankcase ventilation line to side.
- Remove 2 retaining clamps for upper toothed belt cover.
- Disconnect harness connectors at ignition coils -1- and unbolt Ground
(GND) connection -2-.
- Unbolt ignition coils.

- Remove cylinder head cover nuts (arrows) and remove cylinder head
cover.
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15-18

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

Note:
Replace cylinder head cover gaskets if damaged.

CAUTION!
Part numbers are listed here for reference only. Always check with
your Parts department for the latest information. - Using small screwdriver, carefully apply thin layer of sealant D 454 300
A2 to both corners of sealing surface between double bearing cap and
cylinder head (arrows).

- Using small screwdriver, carefully apply thin layer of sealant D 454 300
A2 to both corners of sealing surface between hydraulic chain
tensioner and cylinder head (arrows).
- Tighten cylinder head cover nuts alternately in diagonal sequence.
- Make sure toothed belt cover is installed properly.
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15-21


- Remove Ground (GND) connection.
- Drain coolant Page 19
-4 .
- Remove intake manifold Page 15
-10
.
- Remove ribbed belt and ribbed belt tensioner Page 13
-15
.

- Remove the following lines/harness connectors:
1 - At Wastegate Bypass Regulator Valve -N75-
2 - At Evaporative Emission (EVAP) Canister Purge Regulator Valve -
N80-
3 - At Power outage stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
- Pull off hose connections and remove air cleaner element housing
(arrows).
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15-22


- Disconnect harness connector -1- at Engine Coolant Temperature
(ECT) sensor -G2-/-G62-.
- Disconnect harness connector -2- at temperature sensor II -G18-.
- Unclip all connections from cylinder head and move clear.

- Remove crankcase ventilation line -1-.
- Remove oil supply line at cylinder head -2-.
- Remove heat shield -3-.
- Unbolt turbocharger from exhaust manifold -4-.
- Disconnect coolant hose to heat exchanger at rear of cylinder head,
also detach retaining clamps at connecting flange.
- Remove upper toothed belt cover Page 13
-29
.
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15-23


CAUTION!
Before removing toothed belt, note direction of rotation with chalk or
felt-tip marker. Reversing the direction of rotation of a used belt can
destroy the belt. - Turn crankshaft at central bolt of toothed belt gear in direction of engine
rotation to TDC Cyl. 1 marking (arrows).
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15-24


-
Using Torx wrench T45, loosen toothed belt tensioner (lower arrow).- Push down on toothed belt tensioner.
- Remove toothed belt from camshaft gear.
-
Remove TORX bolt and swing belt tensioner assembly bracket
forward. - Remove cylinder head cover Page 15
-17
.

- Remove cylinder head bolts in sequential order as shown in illustration.
- Remove cylinder head.
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15-27

- Insert cylinder head bolts and hand tighten.

Note:
It is not necessary to re-tighten the bolts.
Note:
Follow all procedures for removing and installing toothed belt Page 13
-
29
. - Tighten cylinder head bolts in sequential order, in two stages:

Step 1 = 60 Nm (44 ft lb)
Step 2 = additional 1/2 turn using rigid wrench (180 is equivalent
to two 90 turns)
- Using new gasket, bolt turbocharger to exhaust manifold and bolt
bracket to engine block Page 21
-24
.
- Install cylinder head cover Page 15
-18
.
- Install toothed belt (adjust valve timing) Page 13
-32
.
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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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e=re
pair&id=AUDI.B5.GE02.15.2