oil AUDI A4 1997 B5 / 1.G APB Engine Valve Gear Service User Guide

15-13


- Pull out seal with oil seal extractor 2085 and bolt 2085/1.
- Clean contact surface and sealing surface.
Do not apply oil to sealing lip or outer circumference of seal before
installing.
- Install guide sleeve (from tool set 3241) onto camshaft.

Installing
Install in reverse sequence.
Note:
When installing Hall sensor rotor, ensure that locating lug engages in slot
in camshaft. - Press in seal until flush using press sleeve 3241/1 and bolt 3241/3.
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15-14

Removing oil seal at Hall sensor (left cylinder
head)

Note:
Leave coolant hoses connected. - Detach coolant reservoir -arrows- and move clear to side.
- Unplug connector from coolant level monitor.
- Move wiring harness clear at bulkhead.

- Unbolt bracket -arrows- for plug connectors on bulkhead and move
clear to side.
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15-15

- Unbolt Hall sensor housing (10 Nm).

- Unbolt Hall sensor rotor (20 Nm) and carefully
lever off rotor using a screwdriver.

- Screw in bolt from 2085/1 oil ring extractor.

- Pull out seal with oil seal extractor 2085 and bolt 2085/1.
- Clean contact surface and sealing surface.
Do not apply oil to sealing lip or outer circumference of seal before
installing.
- install guide sleeve (from tool set 3241) onto camshaft.
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15-17

Rear oil seal and sealing flange (left cylinder
head)

Note:
Rear sealing flange and oil seal on left-hand
cylinder head must be replaceed together as
follows:

- Remove bolts -arrows- and remove engine cover panels -A...C-.

- Remove air duct -arrows-.
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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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15-20


- Remove double bearing cap -arrows-.
- Take out oil seal and sealing flange.
- Clean contact surfaces and sealing surfaces of double bearing cap.

- Apply a thin coating of sealant 454 300 A2 to shaded areas on double
bearing cap (see illustration), install bearing cap and tighten bolts to 10
Nm.
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15-21

- Install guide sleeve (from tool set 3241) onto
camshaft.

Installing
Install in reverse sequence; note the following points: - Press in oil seal until flush using press sleeve 3241/1 and bolt 3241/3.
- Carefully knock in sealing flange against stop using 3202 and a plastic
hammer.

- 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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15-24


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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15-28

- 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.
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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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