S4 V8-4.2L (BHF) (2004)
Valve Guide Seal: Service and Repair
Valve stem seals, replacing
Special tools, testers and auxiliary items required
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Spark plug removal tool 3122 B
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Valve seal removal tool 3364
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Valve stem seal driver 3365
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Disassembly and assembly device VAS 5161
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Adapter T40012
Removing
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Remove engine
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Disconnect engine and transmission
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Remove camshaft timing chains from camshafts
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Remove camshafts
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Remove spark plugs with spark plug removal tool 3122 B.
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Turn roller-type rocker finger upward and secure it with a rubber band.