oil pressure AUDI A4 1998 B5 / 1.G AWM Engine Lubrication System Components Workshop Manual

17-1


Lubrication system
components, removing and
installing

Note:

If large quantities of metal shavings or particles
are found in the engine oil when repairing the
engine, all oil passages must be cleaned
carefully, and the oil cooler replaced in order to
prevent further damage occurring later.
The oil level must not be above max. mark on
dipstick - danger of damage to catalytic
converter!
Oil spray jet and pressure relief valve Fig.
1 , Page 17
-6
Viscosity grades and oil specifications:

Repair Manual, Maintenance

Oil system capacity:

Repair Manual, Maintenance

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17-2


Part I - Oil pump/oil pan components

1 -
28 Nm
2 -
Limit stop for torque reaction support
3 -
Oil pan
Apply silicone sealant D 176 404 A2 before
installing Removing and installing Page 17
-11
4 -
Oil pan
With pressure relief valve (12 bar)Removing and installing Page 17
-28
Before installation check whether the two
dowel sleeves -Pos. 12 - for the
centralizing of the oil pump/cylinder block
are present Replace pump if there is scoring on moving
surfaces and gear teeth Tightening torque for oil pump cover to oil
pump housing: 10 Nm
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17-6


Fig. 1 Oil spray jet and pressure relief valve
1 - Oil spray jet (for piston cooling)
2 - Bolt with pressure relief valve - 27 Nm

Opening pressure 1.3 to 1.6 bar
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17-7


Part II - Oil filter bracket components

1 -
Screw plug - 40 Nm
2 -
Sealing ring
Always replace
3 -
Spring For pressure relief valve, approx. 4 bar
4 -
Piston For pressure relief valve, approx. 4 bar
5 -
Gasket Always replace
6 -
Oil retention valve Tighten to 8 NmBuilt into oil filter bracket
7 -
O-ring Always replaceSlide on until flush with collar on pipe -Item
9 -
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17-9


Repair Manual, Maintenance
17 -
Oil pressure switch -F1-, 1.4 bar - 25 Nm
Black insulationChecking Page 17
-30
18 -
Sealing ring
If seal is leaking, cut open and replace
19 -
15 Nm +
1/4 turn (90 ) further
Always replace
20 -
Gasket Always replaceEngage in projections on oil cooler
21 -
Oil filter Observe change intervalsObserve installation instructions on oil filterTighten to 20 Nm
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17-10


22 -
25 Nm
23 -
Oil cooler
See note Page 17
-1
Ensure clearance to adjacent componentsCoolant hose connection diagram Page 19
-2
24 -
Oil filter bracket
With pressure relief valve, approx. 4 bar
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17-30


Oil pressure and oil pressure switch,
checking

Special tools and equipment

VAG 1342
VAG 1527 B
VAG 1594 A
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17-31

Test requirements:

Oil level OK.
Engine oil temperature approx. 80 C.

Oil pressure warning lamp -K3- must come
on when ignition is switched on.
In vehicles with auto check system the "OK"
display must appear (call up symbol).

Testing oil pressure switch

- Disconnect wire from oil pressure switch.

- Remove oil pressure switch and screw in oil pressure tester VAG 1342.
- Thread oil pressure switch -2- intoVAG 1342.
- Connect brown wire -1- of tester to Ground (-).
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17-32

- Connect voltage tester VAG 1527 B to oil
pressure switch and positive side of battery (+)
using test leads from VAG 1594 A.

Test lamp should not light up.

- If test lamp lights up, install new oil pressure
switch.

- Start engine.

Note:
The switching point of the oil pressure switch can
be reached when the engine is cranked on the
starter motor, so watch the tester and the test
lamp while starting the engine.

Black oil pressure switch:
LED must light up at 1.2 to 1.6 bar.

- If test lamp does not light up, install new oil
pressure switch.
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17-33

Check oil pressure

- Disconnect wire from oil pressure switch.

If specified values are not attained: - Remove oil pressure switch and screw in oil pressure tester VAG 1342.
- Thread oil pressure switch -2- intoVAG 1342.
-
Start engine (engine oil temperature approx. 80 C).
Oil pressure at idling speed: at least 1.3 bar Oil pressure at 2000 rpm: 3.5 to 4.5 bar
- Pressure relief valve or oil pump faulty, replace oil pump Page 17
-
28
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