Is it normal to have a visible slack on the intake side of the timing chain? I have placed both cams and crank at their respective timing marks and have aligned the yellow and orange markings but the chain still folds between the crank and the intake cam, despite the slider being in place. Is this normal slack or should I be looking into moving the chain one tooth down at the crank (the mark on the crank sprocket will then align with the start of the yellow chain link and not the middle). Any help highly appreciated. (Have checked the chain, is within specs, has not stretched).