This is the first time I've ever posted anything in any forum ever, so please bear with me. It's been years since I've done anything to do with timing. I got overzealous when taking things apart and this is where I'm at. I have a 1991 Chrysler LeBaron GTC - V6 - 3.0L 2972cc 181ci GAS MFI 2 valve SOHC. I'm doing a water pump, oil pump, and replacing the oil pick up screen. Now the question is. I have the 2 camshaft at top dead center. Now what about the crankshaft one? The camshaft one did move then I readjusted it to make sure both camshafts were at TDC. I'm just not sure if the crankshaft moved or not. I forgot to mark it before I took off the belt. I know the gear has to come off to replace the oil pump. I think the biggest question is do the crankshaft and and the camshafts both be in the top dead center position to keep it in correct time. I'm also not sure which mark on the gear of the crankshaft is the timing mark. Is it the square, or is it the small circle on the gear? I have a picture of the crankshaft gear with the markings I'm talking about but I'm not sure how to upload it. Thanks if anyone can help me out it would be very much appreciated.