1998 AUDI A4 check oil

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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17-3


6 -
Bolt
M6 Tightening torque: 10 NmM8 Tightening torque: 20 Nm
7 -
Bolt, tightening torque 10 Nm
8 -
Breather housing
9 -
Gasket/breather plate Always replace
10 -
Oil check valve Tightening torque: 25 Nm
11 -
Oil seal
12 -
Connector
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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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17-24


- Unbolt coolant line at front of cylinder head -arrows- and remove.
- Remove water line and auxiliary water pump.
- Remove cover on oil check valves.

Note:
The oil distribution line -2- for the spray jets for piston cooling is also
located in the opening. - Replace oil check valves -1- (25 Nm).
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17-25

Installing
Install in the opposite order to removing. When
installing, note the following points:

- Install lock carrier

Repair Manual, Body Exterior, Repair Group
50


- Install bumper

Repair Manual, Body Exterior, Repair Group
63


- Fill with coolant Page 19
-19
.

Component

Nm
Bolts M6 10
Bolts M8 20
Toothed belt sprocket to camshaft 55
Intake manifold to cylinder head 10
Oil check valves 25
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Cover for oil check valves 10
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17-30

Chain tensioner for oil pump, checking

The chain tensioner incorporates a leaf spring.
To check the spring tension, the lower section of
the oil pan must be removed.

- Remove bumper

Repair Manual, Body Exterior, Repair Group
63


- Move lock carrier to service position.

Repair Manual, Body Exterior, Repair Group
50


- Remove ribbed belt Page 13
-1 .

- Remove lower section of oil pan Page 17
-
26


If no spring tension can be felt and the chain is not being tensioned, this
means the chain tensioner is malfunctioning and must be replaced. - Insert a screwdriver between chain and chain tensioner and press
screwdriver against chain tensioner.
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17-40

Note:
To avoid having to check and adjust wheel
alignment, only loosen the front subframe
mountings and lower the subframe at the front.

- Remove lower section of oil pan.
- Disconnect return lines for turbocharger from upper section of oil pan.

Notes: - Unbolt cover plate -2- for oil pump sprocket.
When loosening bolt -2- securing cover plate, counter-hold at welded
nut. When installing, make sure that the plate engages in position -arrows-.
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