4* is a very small about. I've used the Vito's key in the past, and it roughly moves the flywheel 1/32" (ish) counter clockwise on the crank. Instead of lining up the timing marks perfectly, try moving the timing mark on the flywheel about 1/32" past the mark on the stator cover.
No idea how to do that. I'm building a new engine and installing a vito key at same time. How can I set cam gear if I don't even know where tdc is on flywheel
take the vito key out? time it with the stock key then put it back in. then once your done and timed with the vito key you can line it up with the cam gear then make a mark on the flywheel.