New diagnostic - massive vacuum leak at intake manifold

[hbofinger]

So my mechanic has located a massive vacuum leak to the rear of the intake manifold. Might have to replace the manifold gaskets. Now here is the question:

I cannot find, in the electronic version of the manual, what the torque specification is for the intake manifold bolts.

My mechanic also talked of rubber hoses by the intake that need to be renewed. I think in the diagram below this is the part that is circled in red:



Anybody have any detailed additional comments? My mechanic won't do the job, so I am going to do it...