Is the tick/tack only at startup or is it there once the engine's warmed up. If you're using a fram oil filter, I'd change that right away to a better quality filter like a Napa Gold (Wix) or a PureOne. Changing to a heavier oil like a 15W-40 might also help. Per the factory owner's manual, heavier weight oil like 40W or 50W is fine in warmer temps and for older engine's like our's, it generally helps all the time unless outside air temps are consistently below freezing. Also, might try a high-detergent oil like Rotella to clean things up. Might sound like a shortcut fix, but switching oil weights and filter works wonders at quieting valve train noise in the 258.