Vito 112cdi butt

Hello good afternoon everyone,
I write to see if someone can give me a hand;
I have a Vito 112 CDI Year 2000 and a while ago I lost the Board of the Cuita, as lately my economy is scarce and I saw that I could not take it to the workshop because of the cost that I would take me I started disassembling it in my garage, my first problems came when the injectors were not of which I had to break because I was completely grabbed but well I took them out. But now I have another doubt, can I get the cylinder head without taking out the engine? I have anticipated because I can't get rid of the chain because the tensioner is behind and I don't know what to do.
Thank you very much to everyone.