Overheats in traffic. The heat does not work. Does

Nov 01, 2009

- hey c17hydro, many thank for your quick help and response. I just went over it again. I filled the expansion tank with water to the top and refilled it while on to make sure I have full tank. I put the heater on high and turned the fan speed high. It was cold. I started the car, and it took a while to warm up. The upper hose was in half-inflated position at the begining. it took a while to warm up. I kept squeezing the hose every minute or two and after a while I felt some pressure was built up. The heater was blowing cold air. After squeezing the upper hose a few times, the heater was blowing somewhat warmer cool air but not hot air. Could squeezing the upper hose (which comes from top of thermostat) have pushed some hot water through causing the somewhat warmer cool air to blow? Then, on the up-hill driveway I rolled the car a few yards down and put it in drive to give it a little load going up-hill and mimic heavy traffic condition. While the temperature was under 120, it began to steam, but very little, again from the driver corner under-hood. The upper hose was hotter, fully inflated but not very hard, it could still be squeezed. Many thanks!