2001 Volvo S40

Are you looking for timing marks? Or are you looking to replace crank bearings?

The problem origin is that when I was changing the time belt the two cramshaft were move and y need to know how can I alinate both of them at the back of the engine

If the camshafts moved on you then you need the cam locking tool to lock the cams back in there place.

Once locked you can line up the mark.

But on this model the variable timing hub is locked and does not unlock until it gets oil pressure. So if the cam moved on you, then you can move it back to it's timing marks again. Just look at the diagrams I attached, but if you loosened the variable timing hub you will need the tool to lock the cams. Also the crank has 2 small marks one on each tooth and the block has a dimple on it. Align the dimple in between the 2 marks on the crank. As long as it is in between and the cams lined up you should be fine. Good luck and let me know if the pictures helped you.