I know this may sound goofy but on a related note....
Last spring/summer I found a water leak. Water pump...
Bought a new one a replaced.
Before I replaced the water pump my temp was a steady 175 deg. I could idol all day
and driving did not effect the temp. Fast, slow, stopped the same 175.
Now with a new water pump I am seeing the same thing that many have commented on here.
sitting at an idol, temp rises. When driving fast, or up big hills or in really hot weather. I see the
temp rise.
Just seems goofy to me.