Repairable Vito Injector Threads?

[spike60]

Can an injector bolt thread in a 2000 Vito 110cdi cylinder head be repaired relatively easily with a Helicoil or threaded sleeve? There's one for sale locally I was considering for my own use and gather this is a common problem. I'm a diesel tech of a lot years but have no small diesel Merc experience. Straightforward or one to avoid? Ta!

 

[carat 3.6]

It can be done fairly easily with helicoils, but to do it you need to remove the cam's from the head. Very time consuming....

 

[spike60]

It can be done fairly easily with helicoils, but to do it you need to remove the cam's from the head. Very time consuming....

I've got time, it's £'s I don't have a large amount of! I didn't know if coolant gallery or similar was very close. Thanks.