GU CRD Awesomeness!

Now that I have your attention let me tell you a bit about my query.

I’m long time patrol lover but have now moved on into the RAM community. My son however has now picked up the patrol bug and saved all his coin since he was 11, worked his ass off & purchased his first dream car - a 2011 GU patrol.
Now the fun starts!

He picked up a the car for a good price but in doing that it has come with a few gremlins which I am trying to help iron out while teaching him a thing a thing or 2 along the way.

Like: Rule number 1 - don’t lose your shit when grazing knuckles whilst swinging spanners.

So we have hit a few gremlins that are a little bit beyond my capability and I’m here to try and gain some knowledge from the brain trust.

After spending a small fortune chasing a coolant leak we have finally been advised that the head gasket needs to be replaced.

Now I can crawl my way all over a chev or LS but have always left the internals to the experts & a complex diesel is a little out of my realm. Unfortunately in this case we are out of coin and don’t really have a choice but to attempt this one ourselves.

I have the workshop manuals downloaded, although I’m not too sure how to read them correctly as they cover a lot of year models with different components with the head removal only showing up in early models.

I’m mostly unsure of what to do when it comes to removing and reinstalling the timing Gear ect. and the actual head bolts (do the cams have to come out?)

It would be awesome if someone could provide me any direction in regards to a step-by-step process in removing and reinstalling the head relating to the 2011 CRD ZD 30?

I’m also wondering when it comes to replacing the top end gasket kit and/or the actual head - am I better off sourcing genuine parts (Nissan says none in the country and they have to come from Japan) or are there reasonable aftermarket solutions?

Thanks for any help, I’m a little bit out of my depth with this one but am really trying to get the young lad back on the road as he is only just got his license and is devastated. Cheers