S4 V8-4.2L (BHF) (2004)
Installing
Note: For pressing on replacement valve stem seals, the valve stem seal driver 3365 must be enlarged to a diameter of 10.5 mm.
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A plastic sleeve - A - is supplied with new valve stem seals.
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Place plastic sleeve - A - on valve stem to prevent damage to new valve stem seals - B -.
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Lightly coat sealing lips of valve stem seal with oil.
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Slide valve stem oil seal onto plastic sleeve.
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Carefully press valve stem oil seal onto valve guide using valve stem seal driver 3365.
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Remove plastic sleeve again.
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If valve keepers were removed from installation cartridge VAS 5161/8, insert them into valve insertion device VAS 5161/18 next.
Note: The large diameter of the valve keepers points upward.
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Insert valve spring and valve spring plate.
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Screw guide plate VAS 5161/7 onto cylinder head again.
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Insert installation cartridge VAS 5161/8 into guide plate VAS 5161/7.
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Press down pressure fork VAS 5161/2 and pull knurled bolt upward, thus inserting valve keepers.
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Release pressure fork VAS 5161/2 with knurled bolt still pulled.
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Install camshafts
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Install camshaft timing chains.
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Install engine
Note: After installing the camshafts, do not crank the engine for at least 30 minutes. The hydraulic valve lifters have to settle (otherwise valves will