1999 AUDI A4 AFC Engine Lock Carrier Removing For Service Workshop Manual

Max. permissible pressure difference between
all cylinders: 3 bar (44 psi)

CAUTION!

If the test values are not within the
specifications, recheck compression
pressure after a test drive.
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15-19

Camshaft, removing and installing


Removing

- Removing ribbed drive belt page 13-9 .

- Remove toothed camshaft drive belt page 13
-
11
.

- Remove cylinder head cover.
_________________________________________________________
Left side:

- Remove housing for camshaft position sensor.
Right side:

- Remove plug/cover on cylinder head.
_________________________________________________________

- Remove toothed belt camshaft sprocket.

- Remove camshaft bearing caps -2- and -3-.
- Gradually and evenly loosen nuts for bearing caps -1- and -4-,
alternating in diagonal sequence.
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CAUTION!
DO NOT allow bearing caps to become mixed up. Identify as
necessary using a felt marker.
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15-20

Installing

Tightening torque: 17 Nm (15 ft lb)
CAUTION! - Install bearing caps -1- and -4-.
Gradually and evenly tighten bearing cap nuts, alternating in diagonal
sequence.
- Install bearing caps -2- and -3-.
After installing new or re-installing old lifters, and after installing
the camshaft(s), the engine must not be started for at least 30
minutes. Otherwise the valves could strike the pistons. After working on the valve train and lifters, crank the engine
carefully by hand, at least two full revolutions, to make sure that
the valves do not strike the pistons.
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15-21

Camshaft axial play, checking


Housing for camshaft position sensor
removed
Hydraulic lifters removed
Camshaft bearing caps 2 and 4 removed

- Mount dial indicator in holder VW 387 on front end of cylinder head.
- Push camshaft by hand against dial indicator.
- Set dial gauge to zero.
- Push camshaft away from dial indicator.
- Read axial play on gauge.
Specifications:

New: 0.04-0.15 mm (0.0016-0.0059 in.)
Wear limit: 0.35 mm (0.0138 in.)
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15-22

Hydraulic valve lifters, checking


Note:

Irregular valve noise during cranking is
normal.
Do not interchange hydraulic lifters. If
necessary mark them when they are being
removed.
Place lifters that have been removed on a clean
surface with the contact surface (camshaft end)
facing downward.
Hydraulic lifters cannot be repaired or adjusted.
Faulty lifters must be replaced.

- Start and run engine until warm-until radiator
coolant fan has come on at least once.

- Increase engine speed to approx. 2500 RPM for
2 minutes
If the irregular valve noise stops and then re-
occurs again each time vehicle is used in stop
and go traffic:

-
Replace the oil check valves Repair Group
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17.
If the irregular noise does NOT stop, locate faulty
hydraulic lifter as follows:

- Remove cylinder head cover.

- Turn crankshaft clockwise until cam lobe for lifter
being checked is pointing upward.
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15-23

- Use a wooden or plastic wedge to press valve
lifter down.

CAUTION!
Note:
The illustration is used to show an example of pressing down on the lifter
checking the clearance with a feeler gauge-it does not specifically show
the 2.8 liter V6 engine. - If a 0.20 mm (0.008 in.) feeler gauge can be inserted between
camshaft and lifter, replace lifter.
After installing new or re-installing old lifters, and after installing
the camshaft(s), the engine must not be started for at least 30
minutes. Otherwise the valves could strike the pistons. After working on the valve train and lifters, crank the engine
carefully by hand, at least two full revolutions, to make sure that
the valves do not strike the pistons.
Pa
ge 24 of 35 Lock carrier, removin
g for service
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE01.15.4