What is the normal operating temperature for a 1999 Cadillac DeVille as it shows 194 and not sure if that is high medium or low but don't want it overheating?

Answer 1

The 194 degree you get when you drive is a little below the medium where it should be and that's ok (no worries). But I'm sure it goes higher than that on different road conditions. When it reaches 222 the fans start going faster considered on high to cool down the engine or keep it constantly at 220-225 degrees as you drive. Now that is considered at medium where is normal. Now, when your temperature goes higher than 230-235 degrees that's a sign there's something wrong and it will slowly go to 245 degrees and then afterwords reach 260 and even go higher until it warns you to check coolant level, stop engine, idle engine and more, etc. .In a normal world ppl would pullover and realize it will break the engine, even kill it completely from overheating and not responding in time nor thinking about the consequences that will appear later.

194----just below medium (normal)

218-222-----normal

235-----sign it's starting to overheat (you should check coolant level at that point)

245----the engines is overheating (you should really pullover at this point)

260----engine overheated (pullover immediately, you could cause the engine damage)

260+ take it to the shop

It is said that the northstar engine will not be damaged when overheated and will let you safely drive about 50 miles to get to your destination safely.

I do not recommend anyone driving with any engine that is overheated more than 0 miles as it will cause big damage to the engines head gasket, sensors, and other electrical small devices that can't support high heat.