There is still something wrong. Idle temps should be in the thirties not the fifties.
The fact that it is variable does tend to indicate an issue with the pump or an excessive amount of air in the system.
Incidentally, have you checked Task Manager to make sure there isn't some rogue piece of junk software running wildly in the background? I mean I am not saying that is the problem because even so it shouldn't get the CPU to 80+ degrees, but it may explain the variability.
The fact that it is variable does tend to indicate an issue with the pump or an excessive amount of air in the system.
Incidentally, have you checked Task Manager to make sure there isn't some rogue piece of junk software running wildly in the background? I mean I am not saying that is the problem because even so it shouldn't get the CPU to 80+ degrees, but it may explain the variability.