Here’s how our very sharp Forum Moderator JDS60R does the very important lining-everything-up work on a Volvo 6-cylinder VVT engine (S80 and some others). This is generally done during a timing belt change.
- Lock cams.
- Loosen outer pulley 3 bolts.
- Turn outer pulley clockwise to limit position while holding center.
- Lightly lock down 3 pulley bolts.
- Put center bolt in and lightly tighten.
- Turn outer pulley clockwise until it stops.
- Lightly loosen center bolt so it still has drag but you can turn inner.
- Turn outer pulley one turn (clockwise) until outer pulley mark is 1.5 teeth before mark.
- Tighten center bolt to spec without moving 1.5 tooth relationship of outer (just hold inner pulley while tightening -very easy).
- Install center plug with o ring -tighten to spec.
- Hold inner putting pressure clockwise so it does not move.
- Loosen 3 outer pulley bolts and align marks.
- Tighten 3 pulley bolts to spec.
- Unlock cams.
- Check timing marks through several hand revolutions of motor.
- Remember to go past marks 90 degrees and then back to them on all VVT motors ( once it has been pressurized/run)
Read more about this advice, and the original question, in the Volvo Forum: Confused on Setting the VVT in my ’99 T6