Cylinder Bore, Checking
WARNING: This page is about a different variant/trim than selected.
A shadow or a shiny spot on the wall of the cylinder does not mean the cylinder bore is damaged as long as the cross-grinding is still visible.
Always measure the cylinder bore in 3 places laterally and longitudinally using cylinder gauge VAS 6078 or inside micrometer set 18-100 mm US 1033/S.