A8L V8-4.2L (BFM) (2004)
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Measured distance minus minimum dimension = maximum permissible reface dimension.
‹› If the maximum permissible refacing dimension is 0 mm or less, repeat the measurement using a new valve. If the measurement result is still 0 mm
or less than 0 mm, replace the cylinder head.
Valve Seat, Refacing
