[davidraeburn]

I am seeking some wisdom about the timing marks on a 1995 Sierra .I have put timing belts on lots of Sierras but never seen these timing marks it is a cast metal 4 spoke wheel on the cam not the usual disc type the marks on the spokes do not line up with the timing marks. on TDC no 1 with valves rocking and Dizzy pointing at no 1 lead there in an arrow facing down saying BDC the other mark does not line up with anything.As I see it if this mark Bdc is lined up with top and bottom marks and is at the bottom with the valves rocking on no 1 the timing would be correct but I am wondering if anybody has seen this setup.