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Home >> Audi >> 2009 >> S4 Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Engine Mechanical - 4.2L V8 - Art, Awn, BBD) >> Engine - Cylinder Head, Valvetrain >> Cylinder head, removing and installing >> Valve guides, checking >> Wear limit

Wear limit

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VALVE GUIDE WEAR LIMIT

Intake valve guide Exhaust valve guide
0.8 mm (0.031 in.) 0.8 mm (0.031 in.)
NOTE:
  • If the wear limit is exceeded, repeat measurement with new valves. If the measurement is again exceeded, replace cylinder head. valve guides cannot be replaced.
  • If you intend to replace the valve, measure with new valve.
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