AUDI A4 1999 B5 / 1.G APB Engine Lubrication System Components Workshop Manual

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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17-2


Crankcase breather and oil spray jets,
removing and installing

Removing and installing oil pump, oil pan, oil filter
and oil cooler Page 17
-32

1 -
Bolt, tightening torque: 20 Nm
2 -
Washer
3 -
Tensioning roller
4 -
Bolt, tightening torque: 45 Nm
5 -
Idler wheel
For toothed belt
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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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17-4


13 -
Banjo bolt
Tightening torque: 15 Nm
14 -
Oil distribution line For oil spray jets for piston cooling
15 -
Cylinder block
16 -
Bolt, tightening torque 10 Nm Apply locking fluid D6 when installing
17 -
Oil spray jet For piston cooling
18 -
Gasket Metal gasketAlways replace
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17-5


19 -
Oil temperature sender (-G8-), tightening
torque 10 Nm
For oil temperature gaugeWhiteIf seal is leaking, cut open with pliers and
replace.
20 -
Oil seal Replacing Page 15
-10
21 -
Tensioner
Secure in position before removing Fig.
1

22 -
Bolt, tightening torque: 10 Nm
Apply locking fluid D6 when installing
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17-6


23 -
Washer
24 -
Bearing bush
For tensioning lever
25 -
Washer
26 -
Bolt, tightening torque: 25 Nm
27 -
Tensioning lever
28 -
Bearing bush For tensioning roller
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17-7


Notes: Fig. 1 Securing tensioner in position before removing
- Using a hex key, turn toothed belt tensioning roller -1- clockwise 8 mm
in direction of arrow until tensioning lever -2- compresses tensioner -3-
far enough to enable a 2 mm dia. spring pin to be inserted in drilling
and in plunger.
The toothed belt tensioner is oil-damped and can only be compressed
slowly by applying gradual pressure. Use spring pin from 2024 A.
- Insert spring pin and release toothed belt tensioning roller.
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17-8


Oil pump, oil pan, oil filter and oil cooler,
removing and installing

1 -
Bolt for dipstick guide tube
Tightening torque: 25 Nm
2 -
Dipstick guide tube Replace O-ring
3 -
Oil pan - upper section There is no gasket between engine block
and upper section of pan. Only use silicone
sealant D 454 300 A2.
4 -
Hex socket head bolt M8 Tightening torque: 20 Nm
5 -
Hex bolt M6 Tightening torque: 15 Nm
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17-9


6 -
Hex socket head bolt M8
Tightening torque: 20 NmThe coolant drain screw is next to this bolt
7 -
Hex bolt M6 Tightening torque: 10 Nm
8 -
O-ring Always replace
9 -
Gasket for lower section of pan Sealing surfaces should be clean and dry
10 -
Oil drain plug Tightening torque: 30 Nm
11 -
Seal for oil drain plug Always replace
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17-10


12 -
Hex bolt M6
Tightening torque: 10 Nm
13 -
Oil pan - lower section
14 -
Hex bolt M6 Tightening torque: 10 Nm
15 -
Retainer for oil lines
16 -
Oil supply line From pump to oil filter
17 -
Oil supply line From oil filter to engine oil system
18 -
O-ring Always replace
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