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

15-37


- Unbolt water line -1- and pull it towards the rear.
- Unbolt bracket -2- from cylinder head.
- Remove heat sensor -2-.

- Unbolt turbocharger -1- from exhaust manifold (3 bolts).
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15-41


Tightening torques - 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. Component

Nm
Bolts M6 10
Bolts M8 20
Camshaft bearing caps and camshaft adjuster 10
Exhaust manifold to cylinder head 25
Front exhaust pipe to exhaust manifold 25
Oxygen sensor 50
Spark plugs 25
Toothed belt sprocket to camshaft 55
Intake manifold to cylinder head 10
Cylinder head cover 10
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15-45


- Unclip solenoid valve for charge pressure control -1-.
- Pull connector off EVAP valve -2-.

- Pull connector off throttle unit -1-.
- Pull connector off charge air sensor -2-.
- Pull off crankcase breather -3-.
- Pull connector off intake air temperature sensor -4-.
- Pull connector -5- off Hall sensor.
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15-55


Tightening torques - 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. Component

Nm
Bolts M6 10
Bolts M8 20
Camshaft bearing caps and camshaft adjuster 10
Exhaust manifold to cylinder head 25
Front exhaust pipe to exhaust manifold 25
Oxygen sensor 50
Spark plugs 25
Toothed belt sprocket to camshaft 55
Intake manifold to cylinder head 10
Cylinder head cover 10
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15-64

Installing
Install in reverse sequence; note the following
points.

- install fuse No. 28 (for fuel pump).

- Erase Diagnostic Trouble Code (DTC)
memory.

Note:
Malfunctions will have been stored in the
memory because the connector to the Hall
sensor has been unplugged. Therefore
interrogate and erase the DTC memory after the
test.

Tightening torque

Component
Nm
Ignition coils to cylinder head 10
Spark plugs in cylinder head 30
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15-76

Right cylinder head

- Remove right-hand cylinder head cover Page
15
-25


All:

- Unbolt Hall sensor housing (10 Nm).

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

- Insert camshaft clamp 3391 in securing plates of
two camshafts.

- Loosen both camshaft bolts and remove approx.
5 turns.

- Take out camshaft clamp 3391.
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15-85

- Install cylinder head covers Page 15
-22
.

- Install toothed belt Page 13
-4 .

- Install ribbed belt Page 13
-1 .

Tightening torques

Component

Nm
Bolts M6 10

M8 20
Except for the following:
Bearing caps to cylinder head 10
Camshaft adjuster to cylinder head 10
Hall sensor rotor to camshaft 25
Hall sensor housing to cylinder head 10
Camshaft sprocket to camshaft 55
Camshaft bearing cap and camshaft
adjuster 10
Cylinder head cover 10
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