What are the timing marks for a 1997 Cadillac Catera?

The rear metal timing belt cover has a notch behind each of the camshafts. Use these notches to put the mark on the camshaft gear starting from passenger side with the #1 on the camshaft gear, then 2,3, & 4 in order. On the crankshaft you must remove the 6 bolt holding the pulley and remove pulley so that you may access the mark on the bottom gear. One you locate that mark that one should be aligned at 6 o'clock position with a recess on the front right underneath that gear. At this point cylinder #1 is at top dead center. If you had removed the timing Gears, Install the gear so the alignment pin on the cam is in the correct, numbered alignment slot on the cam gear, to prevent a 180 degree out cam timing.