No they didnt change any cooling system parts just oil pump, sensor and they did an oil change. Before I changed the coolant car was at 80 all the time never above, after I changed the coolant it goes way up there to 98. Is it good for the water to be hot? It seems not so but I am thinking that once they changed the coolant before the car was under the snow of canada and now it is in So Cal so they adjusted the water %