Hi Rob,
The dowelpins are not supposed to be taken out by hand. You can ream the dowelpinholes oversize. I believe there is a non-metric size slightly larger than the standard 8mm dowelpins. Am not sure though.
I've used a Loctiteproduct #? that is for glueing rollerbearings in place when they're fitting to loose (do I make any sense
?)
But I only used it in standard engines which only see moderate use.
Hope this helps a bit, and I will look up the loctite#
Cheers,
Richard