Over a few cold bevies I've just been thinking and looking back at when I had my CRD.
Ca'rs coolant temps would rocket at the smell of any hill.... My system was normal and this was before AND after the NADS.
It never got anywhere near what you have had mate. I think max it got to once was like 102C... And even that for me was panic stations... But the temps quickly recvered.
CRD's are known for higher EGT's but ... I'm not sure about coolant.