checking oil AUDI A6 1999 C5 / 2.G AEB ATW Engines Valvetrain Servicing Workshop Manual
Page 4 of 51
15-34
6 -
Valve stem oil seal
Replace Page 15
-62
7 -
Valve spring
Removing and installing Page 15
-62
8 -
Valve spring retainer
9 -
Valve keeper
10 -
Hydraulic valve lifter
Check Page 15
-60
Removing and installing Page 15
-62
Do not interchangeWhen removed, store with contact surfaces
facing down Before installing, check axial play in
camshafts Page 15
-41
Oil contact surface
11 -
Intake camshaft Using Plastigage check radial play (valve
lifters removed)
Wear range: 0.1 mm (0.004 in.)
Max. run-out: 0.01 mm (0.0004 in.)Axial play, checking Page 15
-41Pa
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Page 9 of 51
15-38
23 -
Intake valve
Do not reface by grinding; only hand
lapping is allowed Valve dimensions Page 15
-39
, Fig. 1
Checking valve guides Page 15
-66
Refacing valve seats Page 15
-71
24 -
Oil seal
For intake camshaftReplacing Page 15
-42
25 -
Shutter wheel for Camshaft Position
(CMP) sensor -G40-
Note position: insert lug in camshaft notch
26 -
Washer ConicalNote position
27 -
Bolt 25 Nm (18 ft lb)
28 -
Camshaft Position (CMP) sensor -G40-
housing
29 -
Bolt 10 Nm (7 ft lb)
Pa
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Page 34 of 51
15-60
Hydraulic valve lifters, checking
Special tools and equipment
Feeler gauge
Wood or plastic wedge
Note:
Hydraulic valve lifters cannot be serviced.
Irregular valve noise when starting engine is
normal.
- Start engine and let run until coolant
temperature reaches at least 80 C (176 F).
- Increase RPM to 2500 for about 2 minutes; if
necessary test drive vehicle.
Note:
If irregular valve noises disappear but then
reappear during drive, replace oil retaining valve.
Oil retaining valve is located in oil filter bracket
Page 17
-6 .
If hydraulic valve lifters are still loud, locate faulty
Pa
ge 34 of 51 Valvetrain, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.3