Checking valves for wear • Clean combustion residue from valves. • Check valve dimensions. a ............................................See Technical data Remachining valve seat D B RS110890 e Caution: Width (B) and diameter (D) must always be main- tained when remachining the valve seat. a ............................................See Technical data Checking and repairing cylinder head • Remove combustion residues from combusion chamber. • Check sealing face for damage/distortion, and skim flat if necessary. Skimming sealing face: ........... max. 0.2 mm (0.008 in) metal removal Checking valve guide for wear • Check valve guide bore.
a ............................................See Technical data 11.27