Originally Posted by Infiniti Chica

I'll try not to be repetitive since you've gotten good advice so far. I'd start with the thermostat, especially since you describe 2 temps on the top and bottom hoses. Thermostats are usually a 2 bolt removal- it seems the most likely first place to look since you have coolant in the car. Secondly, if that doesn't fix it, move up one step and look at a faulty sensor possibility-- a bad sensor can result in your engine running rich and unstable cabin and engine temps. If that doesn't fix it, look at the radiator core-- is it blocked. The next step is examining the water pump-- is it going bad, Finally, and this one requires you swallow first, check for exhaust in the cooling system to make sure it's not a blown head gasket.

So you basically move from least expensive and simplest to most expensive and complicated. Good Luck.

Originally Posted by geronimomoe

Clogged radiator?