engine oil AUDI TT 2000 8N / 1.G AEB ATW Engines Valvetrain Servicing Workshop Manual

15-42

Oil seals for camshafts, replacing


Cylinder head installed
Lock carrier in service position Page 13
-1

Special tools and equipment

2085 seal puller
3241 seal installer
3036 retainer

Replacing exhaust camshaft oil seal

Removing

- Remove ribbed belt and ribbed belt tensioner
Page 13
-15
.

- Remove engine covers.

- Remove upper toothed belt cover Page 13
-
29
.

-
Turn crankshaft at central bolt of toothed belt gear in direction of
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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
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15-65

Installing

CAUTION! - Place plastic sleeve -A- on valve stem to prevent damage to new valve
stem oil seals.
- Lightly oil lip of valve stem oil seal -B-.
- Insert valve stem oil seal into 3365 valve stem seal fitting tool and
carefully slide onto valve guide.
- Remove plastic sleeve.
- Install camshafts Page 15
-53
.
After installing the camshafts, the engine must not be started for
approx. 30 minutes. The hydraulic valve lifters have to settle
(otherwise valves will strike the pistons). After installing the valvetrain and lifters, carefully rotate the
crankshaft by hand at least 2 full revolutions before starting to be
sure that valves do not strike the pistons.
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