My 48 3100 was not getting even warm. I opened the thermostat compartment I found no thermostat. I drained the radiator and added 180 thermostat. Add new fluid and started up. The temp went to 220 and I shut it off. Notice the top hose was HOT and the bottom hose was COLD. Cab heater was producing good heat now... Drained radiator via peacock valve.... Thoughts? really appreciate.
