I am confused as 240 is hot and 250 is overheating
195-210 is where the temp should run no matter what. It is not 1970
215 is cause for concern but look in the right place for the fix
The cooling system is not problem yet
The answer is related to
The exhaust temps engine running and engine off are all over the place. The two middle cylinders have a 100f difference than the end ones both banks with the left side was considerably hotter than the right side