absolutely not, those are for when a new chain is installed on an engine undergoing assembly those dark marks are for lining up a new chain , which you would set a copper link to the mark, then a copper link with the intake adjuster and one copper link with the exhaust adjuster ,you would only see the mark on the crank with front cover removed , timing is verified with the marks at camshaft plate , or by removing cam sensors and verify a certain position of camshaft plate viewed thru timing sensor holes.