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Reworking inlet valve seat > < Reworking valve seats

Octavia Mk1

Calculating maximum permissible reworking dimension
Calculating maximum permissible reworking dimension
–  Insert valve and press firmly against the valve seat.
  Note
If the valve is replaced when carrying out repair work, use a new valve for the measurement.
   
–  Measure distance -a- between the end of the valve stem and the upper face of the cylinder head.
–  Calculate max. permissible reworking dimension from the distance -a- measured and from the minimum dimension.
l  Minimum dimension for inlet and exhaust valve: 31.7 mm.
Distance measured -a- minus minimum dimension = max. permissible reworking dimension.
Example:
  S15-0312
 Measured distance32.0 mm
-Minimum dimension31.7 mm
=max. permissible reworking dimension → Note0.3 mm

1)  The max. permissible reworking dimension is shown in the figures for reworking the valve seats as dimension “b”.
  Note
If the max. permissible reworking dimension is 0 mm or less than 0 mm, repeat measurement with a new valve. If the measuring result is still 0 mm or less than 0 mm, replace cylinder head.
   

Reworking inlet valve seat > < Reworking valve seats