How do you set camshaft timing on opel corsa 16valve twin cam 1.7dti?

Oh, dude, setting camshaft timing on an Opel Corsa 16-valve twin cam 1.7dti is like a walk in the park... if that park is filled with confusing diagrams and tiny tools. You basically need to align the timing marks on the camshaft sprockets with the marks on the cylinder head. Just make sure everything lines up perfectly, or your engine might sound like a dying walrus. Good luck!