timing marks?

Question

on my vibration dampner (harmonic balancer) there is 4 marks on it, is the thinkest mark the one i use for timing?

1984 chevy s10 2.8L V6

Answer 1

yes its tdc it lines up with the proper degree mark

Answer 2

zero degrees tdc should be the largest, and longest one in the center of smaller marks. they are in 5 degree increments before, at and after top dead center on the number one cylinder. read your manual, you should be a few degrees before tdc, not on the big mark. the big mark is more for a reference point for installing the distributor or adjusting valves.