We just purchased a 1996 Plymouth Voyager with a 3.0 last night. When we stopped to get gas on the way home(about 45 miles) the radiator was gurgling and filling the overflow....then the overflow overflowed onto the ground. The gages read about 1/2 way...so not reading as overheating. My husband drove it about 55-60 mph all the way, and did not have the air conditioning on the whole time-so should not have been driven hard. Is it normal for a radiator to do that when you shut the vehicle off? The hose did not feel hard(at least not the top one...is there a bottom one to check or doesn't it matter?). Could a faulty radiator cap cause this issue? I am really worried it is the head gasket...... Or is this normal? This morning I see all the coolant is out of the overfill container and in the radiator again. I opened the radiator cap, which didn't seem tight and there were small silver/gray sticky clumps on the spring and underside of the cap. I am so upset that we didn't even make it home with this vehicle! When I emailed him to let him know, he said it has never overheated before. Thanks in advance for any help/advice anyone can give!