AUDI A4 1996 B5 / 1.G APB Engine Valve Gear Service Repair Manual

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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Note:
Plug lower section of pressure line. - Disconnect hose -1-.
- Disconnect hose -2-.
- Detach upper section of pressure line -3-.
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- 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
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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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15-65

Sealing cap (core plug) in cylinder head,
installing

The cylinder head supplied as a replacement
part can be used on both sides (left or right). But
a sealing cap (core plug) must be installed in the
front end of the cylinder head in each case.

- Coat outside circumference of sealing cap (core
plug) with sealant AMV 188 001 02.

- Using drift VW 295, knock in sealing cap (core plug) until outside rim is
flush with end of chamfer in cylinder head.
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15-66

Camshaft adjustment, checking function


Special tools and equipment

Test requirement:
WARNING!
VAS 5051 with VAG 5051/1
orVAG 1551 with VAG 1551/3ACoolant Temperature at least 80 C. During a road test in an airbag-equipped vehicle, test equipment
must always be fastened to and operated from the rear seat by a
second technician. When driving or riding in an airbag-equipped vehicle, NEVER hold
the scan tool or other test equipment in your hands or lap while in
motion. Objects between you and the airbag increase the risk of
injury in an accident.
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15-67

Test sequence

- Connect VAS 5051 tester or VAG 1551 scan
tool and select control module for engine
electronics using "address word" 01. Engine
must run at idle for this.

Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01

Rapid data transfer
HELP
Select Function XX

When indicated on display
- Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Initiate basic settin
g
Q
Input display group number XXX

When indicated on display
- Press buttons -0-, -9- and -4- to select "display group number 094" and
press -Q- button to confirm input.
System in basic setting 94
1
2
3
4

When indicated on display
Camshaft adjustment is checked for function.
- Increase engine speed to above 2000 RPM.
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Display fields

1 2 3 4
Display group 94: Function of camshaft adjustment
Display 1 RPM Text Text Text
Indicated Engine speed (RPM) Camshaft adjustment Test result, Bank 1 Test result, Bank 2
Specified value >2000 Cs-CM. ON Test ON
Sys. OK Test ON
Sys. OK
Note: If "not OK" is indicated in display field 3 and/or 4:

- Check solenoid valve for camshaft
adjustment.
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Solenoid valve for camshaft adjustment,
checking

Special tools and equipment

VAG 1526A
VAG 1527B
VAG 1594A
VAG 1598/31
VAS 5051
- or
VAG 1551 with VAG 1551/3A
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15-70

- Initiate output Diagnostic Test Mode (DTM) and
activate the valve for camshaft adjustment.

Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 01

If valves do not click during output Diagnostic
Test Mode (DTM):

Checking internal resistance

- Switch ignition off.

- Remove bolts (arrows) and remove engine covers -A- and -B-.

- Remove air distributor (arrows).
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