1995 AUDI A4 check engine

17-1


Lubrication system
components, removing and
installing

Notes:

If large quantities of metal particles or other
deposits (caused, for example, by partial
seizure of the crankshaft or connecting rod
bearings) are found in the engine oil when
performing repairs, clean the oil passages
thoroughly and replace the oil cooler in order to
prevent further damage from occurring later.
Always replace O-rings, gaskets and oil seals
when performing repairs.
The oil level must not be above the max. mark -
otherwise this can cause damage to the
catalytic converter. Markings Page 17
-67

Viscosity grades and oil specifications
Repair Manual, Maintenance

Oil capacities
Repair Manual, Maintenance

Checking oil pressure Page 17
-65

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17-12

Oil check valves, replacing


Note:
If irregular valve noise occurs repeatedly during
short journeys and disappears after extended
driving, the oil check valves must be replaced.

All cable ties which are released or cut open
when removing the engine must be replaced in
the same position when installing the engine.
Catch drained-off coolant in a clean container
for re-use or disposal.
Replace all gaskets and seals.

Removing

- Remove bolts -arrows- and remove engine cover panels -A...C-.
- Remove cover above air cleaner.
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17-21


Note:
Turn over the engine at the central bolt on the crankshaft. - Turn crankshaft to TDC by hand. Marks -A- and -B- must be aligned.
- Check position of camshafts: larger holes in securing plates on
camshaft sprockets must align opposite one another on inside. If this is
not the case, turn crankshaft one revolution further.
- Remove sealing plug from cylinder block, left.
The TDC drilling in the crankshaft must be visible (or able to be felt) in
line with the sealing plug hole.

- Screw clamping bolt 3242 for crankshaft into sealing plug hole and
tighten.
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17-65

Oil pressure and oil pressure switch,
checking


Note:
Servicing and checking function of oil pressure
warning lamp and buzzer:

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Test procedure

- Remove oil pressure switch (F1) and screw oil pressure switch into
tester.
- Screw tester into oil pan in place of oil pressure switch.
- Connect brown wire of tester to ground (GND) (-).
- Using test leads from VAG 1594, connect diode test lamp VAG 1527
between positive battery terminal (+) and oil pressure switch.
- Start engine and gradually increase engine speed.
LED should light up at 1.2...1.6 bar, otherwise replace oil pressure
switch.
- Increase engine speed further.

At 2000 RPM and an oil temperature of 80 C oil pressure should be at
least 2.0 bar.
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17-67

Oil level, checking


Test conditions

Oil temperature above 60 C.

Vehicle level.
The vehicle must be standing on level
ground when checking the oil level. Wait for
a few minutes after switching off the engine
to allow the oil to flow back into the oil pan.

Test sequence

- Pull out dipstick, wipe off with a clean cloth and
insert it again as far as it will go.

- Pull out dipstick again and read oil level.
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