A4 Quattro Sedan L4-1.8L Turbo (AEB) (1998)
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Replace valve stem oil seals, Refer to Seals and Gaskets, Engine, Valve Guide Seal, Service and Repair
WARNING!
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Valves must not be refaced by cutting or grinding.
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Only hand lapping is permitted.
WARNING!
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Sodium-filled exhaust valves must not be scrapped without first being properly treated.
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The valves must be cut open using a hacksaw, by hand, between the valve head and the middle of the stem.
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The valves must not come into any contact with water while being cut.
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After cutting open the valves, throw not more than 10 at a time into a bucket of water and step back. A sudden chemical reaction will
occur during which the sodium filling is consumed.
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Valves that have been treated in this way can be disposed of as normal waste.
