Can anyone give me some advise on how to chnge the cambelt on a 52 plate Primastar(Vivaro/Trafic). My main problem is that there arent any timing marks that i can see on the cam pulley, i have a manual but it shows timing marks.

I just need to know how to keep everything timed up while i swap the belt(and change water pump). I have got crankshaft pin and will get it tensioned up by a garage after fitting.

Regards Shane.