When I drive up a hill, or it is really hot out, or I am in stop and go traffic, the temp creeps up to around 220 (about halfway between 210 and the next mark on the gauge). If I kick on the heat it drops almost immediately to 210. If I get out on a flat road, after 5 minutes or of driving at 50mph+ it'll go back down. I replaced the water pump a couple of months ago so that's not an issue. I only started noticing it in the last month or so as the temps here have gone up to where I don't use the heat in the morning. Is it the radiator, or thermostat or some other issue? Thanks. Everything is stock and the mixture is 50/50.

 

I would think you're fine and would say temp is about 215F. We've momentarily seen 230F on the ScanGauge and no idiot light.

 

ok thanks!

 

Is it automatic? If so it can be from your tranny heating up the rad, you can always add a cooler and remove the lines from the rad. I did this on my 92. I installed a cooler and a fan on the top of my hood. Worked great!