What do the timing marks look like on 1999 S70 Volvo I can't see them on crank shaft or intake and exhaust gears or the arrow mark to match crank gear to.?

the timing marks on the crankshaft pulley are small about 1/4inch little "bumps" one is on the block and the other on the pulley right behind harmonic balancer pulley. there are two small "teeth" in two gear teeth, if you find those the second mark (mentioned above) is between them. As for the cam gears you have to have the back timing cover on its the small one and you can place it without bolting up. there are two slight 90 degree angles cut out of the round part of the this housing. on the left gear its at about 2:00 on the right about 10:00. and the marks on the pulley are slight indentions, like small lines. line these up and you should be good to go.