english please not dutch !

for a start you do not remove the thermostat the water travels too fast
to allow cooling throught the radiator - needs a restrictor of some sort.

has the radiator been cleaned

I have and use a multi blade fan.

these should run at around 82C

I tried a Babelfish translation but I think the Dutch makes more sense!!

I have a mini with 1275 cc an engine from an underground railway with fast
scramming ash problem: Engine temperature runs too high on ± 110 degrees
celcius. Matter which is checked: radiator 2 core. thermostat removed large
ring placed engine is whole gerevideerd and afterwards adjusted on a role
bank to optimum performance bijpass canal in head and pump, enn large
impellor engine hydraulic pump introduced metal 4 booklets adjustable
aerator have therefore assembled had this problem also for the revision He
who weet still something