Glue repairs are common.
Yes, much more complex than the 616.
But Ive learned after doing valve adjustment on my 240 today, that it's actually easier on the 617 than 616.
On the 616, turning the engine over properly (27mm socket on the crank) is harder!
Harder to remove fan, impossible to remove shroud without a belt and/or hose, deeper pulley to get the socket into, etc.
On my 617s I'd turn them over from the top, no fan or shroud removal, using a breaker bar.
On this one, fan removed, it was tight!
Impossible from the bottom:
And squeezer somehow from the top:
