The characteristics you mentioned sound normal or perhaps slightly higher
than normal. Make sure the rad is not full of busted bugs. Give it a good
rinsing off with the water hose from the outside in and inside out if
possible. There are some that say the thermostat should be changed every 2
years. For the sake of the cost of a thermostat, give that a try. Also check
rad level by removing cap and looking in. Don't just go by the overflow
bucket. DON'T remove rad cap while hot. Make sure you can squeeze both sides
of the upper rad hose together before removing rad cap. Goodluck