Thanks for the overwhelming response here... I was on the road all day yesterday, so didn't have a chance to check the posts. Here's the situation as it stands now.
- Got the radiator flushed and coolant replaced. Coolant was very rusty. Got on the highway and the car ran cooler than it has been (c.
- On the highway, car only got up to 120C twice, even with A/C running. About 30 seconds blowing the heater and it comes back down to
- Coming up to Monarch Pass on Highway 50 in Colorado, and the car's still running great. Mountain driving, but the car seems to be handling it just fine. Temp is showing about 100C. I get to the summit, which is about 11000 feet in altitude, turn into a scenic overlook to take a break, and as I'm turning steam starts coming from under the hood and coolant starts overflowing. Temp gauge still isn't over 120C.
- Only after the car overheated on the pass do things change. On the way downhill, the car continues to heat up, and blowing the heater is to no avail. In fact, the temp gauge TOPS OUT at the BOTTOM of the mountain and the heater stops working - just cold air. Even with the temp gauge at max, there is only a small amount of coolant overflow when I pull over, but the auxiliary fan is not turning.
- After the car overheats, I'm limping down the highway with the heater on high. The air alternates between being cold and blowing hot. I can tell when the heat is about to start blowing because there's a WET, SUCKING sound from behind the dashboard before the air gets hot. When it's hot the temp comes down, but the hot air only lasts about 60 seconds.
- I stop the car for about 45 minutes, top off the coolant, and when I start back up the heater works fine and the operating temp stays between 80 and 100C, the coolest it's run all day. With the heater on high, I limp down the road to where I am. Currently, I'm stuck in Grand Junction, CO on a Friday before Memorial Day weekend, with a car that can't make it down the highway without overheating, and I need to get back to Los Angeles. Any thoughts?
Thanks for all the help. Aust> Alright... I reread all your post. My question is...