Anybody give me advice on running temp. When engine on idle temp climbs to about 110 when running seems temp at between 70 to 90 fan comes on ok. Other 164 have been 12v. does the 24v run hotter any advice would be appreciated.
Shouldnt go above 100 really as the thermostat should open up fully at 95 and shouldnt really go below 85 once hot. I had the same symptoms as you until recently - change your thermostat. Not a hard job, parts costs about £16 from memory (it is actually a thermostat and aluminium housing) and don't forget the gasket.
Mine sits at 90 degrees solid now once it has hit the 95 trigger and then dropped after the thermo cuts in.