OK, the guide plate at the back of the crank sprocket should have a tiny little notch in it. Or maybe it's the front one. Either way, the marks exist and match the block, but you might have to degrease it a little bit to see properly.

That notch lines up with the little extrusion (?) in the casting of the block right behind the crank sprocket. I'm 90% sure on that... I can remember something of the sort on the B230 engines. You might also have a little punch mark on the crank sprocket, but I can't remember offhand. I always set the engine up to TDC and then do the belt work--it doesn't move in the meantime.

I think this is what you're asking: Once the crank sprocket is lined up properly, put the camshaft sprocket at it's mark. Then you're all set. If you're really anal, line up the intermediate shaft... but that one doesn't have any need for a timing mark on a 700 series car. It just runs the oil pump.

Lining up with the crank sprocket marks is a guaranteed way to find TDC, rather than feeling for pressure. That method doesn't work as well, and you need to be TOTALLY accurate, which is hard to do that way.

I'm being basic just in case you might have missed a thing or two--it might be repeating most of what you already know. I just like to be thorough.

--
chris herbst, five volvos.