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Checking valves > < Valve dimensions

A4 Mk1

Checking valve guides
Checking valve guides
Special tools and workshop equipment required
   
t  Universal dial gauge bracket -VW 387-
  W00-0037
t  Dial gauge -VAS 6079-
Procedure
  Note
t  If the valve has to be renewed as part of a repair, use a new valve for the measurement.
t  Only insert inlet valve into inlet guide and exhaust valve into exhaust guide, as the stem diameters are different.
  W00-1261
–  Insert valve into guide.
l  End of valve stem must be flush with valve guide.
–  Secure dial gauge -VAS 6079- to cylinder head with universal dial gauge bracket -VW 387- as shown in illustration.
–  Measure the amount of sideways play.
Wear limit:
l  Inlet valve guide: 1.0 mm
l  Exhaust valve guide: 1.3 mm
–  If the wear limit is exceeded, repeat the measurement with new valves.
–  Renew cylinder head if wear limit is still exceeded.
  Note
Valve guides cannot be renewed.
  V15-0133

Checking valves > < Valve dimensions