It really doesnt matter, turn the engine with the old sprockets on there till they line up at these positions. Take them off and put the new ones on at the exact same position. If you dont feel confident doing it, when you get it done turn the engine over by hand and make sure the timing marks line up at TDC. It will be way off if you are off by one tooth. When replacing timing chains/belts not all vehicles are done at No. 1 TDC. If you are really worried about it, make a mark on the actual cam shaft and crank where the timing mark is supposed to be and then take the old ones off. You will know if you get it on there wrong.
Last edited by Jpnorris87; 01-23-2009 at 08:08 PM.
Reason: forgot something