
If there are signs of oil leakage through the camshaft seals, first check if the crankcase ventilation system is clogged and if its hoses are pinched, repair if necessary

A sealing gasket is installed between the flanges of the cylinder head and the manifold, made of two thin molded metal strips, interconnected by spot welding

Remove the cylinder head cover (see "Adjustment of thermal clearances in the engine valve mechanism")