I was having same problem even after I changed cracked head three weeks ago just got back from doing mojave rd. My temps now around 190. Changed 1 year old leaking 2 row CSF for 105 dollar autozone put spring in lower rad hose auto zone 180 tstat with hole drilled in it and autozone rad cap...
The mice are on hooks usually only use one radio at an event so I tuck the other one up it is way better than a mic sitting on your lap always falling to the floor and your passenger hitting your radio with their legs.