Radiator or Water Pump etc.??

[lopezbros]

I have a 1996 Sedan Deville 121,000 miles on it. Seeee at idle, the temp gets hot 222 - 230, so what i do is put my cruise control on 45mph, a/c on, to kick the fans on, and like this the engine cools down rapidly to 194 f temperature. But when i come to a red light heats back up (not a whole lot) to 210.
What could it be? The Radiator? that would be my guess, maybe its clogged??

[maxwedge]

The fans don't normally come on till 222 degrees, may not be any problem here. At 225 see if they come on , no a/c on of course.

[caddydaddy]

Although not the same engine, but my '94 Deville with the 4.9 will get up to 235 sitting at a light, and around 190 on the highway. So I don't think there is any problem with your car. Unless you are hitting 240 or more, I wouldn't worry. Usually the engine temp warning doesn't come on until 260 or so.