there may be a small amount of adjustment needed to get the cam tool to slot in, literally a mm or 2 i used a dial gauge on number one cylinder,which will give tdc accurate to a 1000th inch, that way there is no mistake, i ahve looked on my crank pulley for a mark, there isnt one the lower cam chain is only important to time up on distributor vr6 engines. As it drives the oil pump and nothing else on a coilpack vr fitting of the chain tensioner is important as well, i usually use about a teaspoon and a half of fresh oil poured into the tensioner then replace the plunger and bleed down with a l