Engine Cooling problem
2002 Chrysler Sebring 6 cyl Front Wheel Drive Automatic 75000 miles

temp guage reading normal, although no heat from heater. Temp light came on and engine steamed from around a bolt (tight) on the thermostat housing near the bleeder fitting. I used the bleeder to release steam and added water to resevoir. It took quite a lot of water, so the "steaming" may have been going on for some time. Seemed fine but after a twenty mile drive, some slight steam from the bolt, and some water loss. Without a radiator cap, I can't tell is the pump is bad, or if its the thermostat, or if I should just seal the bolt.