Workshop Manual

009W2329-R01
C12
Replacement of valve guides
Replace the valve guides whic h are pressed into the cylinder head if the tolerance is
exceeded because of wear and tear by 0.05 mm. Check the measure with a ø9 – H7 internal
gauge according to the drawing below of the valve guide.
Fit new valve guides according to the drawing on page C13. Before fitment, heat the cylinder
head in an oven or heat it in boiling water and cool down t he valve guides in a deep freezer
or otherwise.
After fitment of new valve guides, broach the bore of the valve guides with a broach in order to
remove possible ups ettings from the fitti ng. Use a broach ø 9 – H7 for the broaching.