On my way up to Norwalk, my car overheats in Delaware!!! I pulled off at a service station to cool off. The coolant reservoir was BOILING, and running off the hose. After the engine cooled a little, I topped off the radiator with water. It drove OK for about 10 miles, and the temp needle goes up. Again, I pulled off to cool off the engine.

Because I'm so pissed off, I turned around to go home. Somehow, the temp remained "normal" until I got to the Polaris exit, so I decided to head back up to Norwalk. I pulled over to the rest area to get some water. When I popped the hood, coolant was seeping out from under the reservoir cap and boiling. WTF!!! After the engine cooled a little, I head home. The water temp was normal until I got home. However, when I exited the highway, the water temp begins to rise to 3/4 hot and stayed there until I got home.

Things I've done or changed to remedy the problem:
compression test--180 all 4 cyclinders (8.8:1 compression)
replaced thermostat with 160 degree
30% coolant + bottle of wetter+ 70% water
ghetto radiator cooling with washer/dryer flex hose
"burped" the cooling system

On top of that, I called Amerihost about my saturday reservation, and they won't give me a break. I told them my car is down. They said, "no exceptions." So, I'm out $129 for a room that I'm not even staying in.

I am so frustrated, especially when I've planned for this weekend for 6 months!! Anyway, I hope you guys had a good time.

It's probably just the radiator cap. Sorry you missed the shootout man, that really sucks. Especially since you still had to pay for it and all ;(. There's always next year, and trust me, it will be even better.

Sounds like it has a clog or something in there. The reason it's boiling is cause the coolant isn't circulating, in other words the coolant that's in the block is staying there, heating up, and not going anywhere. When you're driving it at highway speeds it helps it out cause air hits the radiator and dissipates some of that heat. When you slow down or stop, it heats back up again and boils enough to overflow the reservoir.

The thing you gotta do is find out where the clog is, since you already replaced the thermostat that's one thing that's not it. Maybe there's just some loose deposits in the radiator, or worse, the headgasket.

i sorta have the same problem too but i still haven't gotten it fixed yet. but it sounds like ur car just like heading home, and that's it...:D

yah, try the cap its pretty cheap. if that dont work try to flush out all the crap in the radiator and refill. if not maybe it could be the headgasket..
oh no...
good luck
Michael
99gs (broken) Motor being built now
HRC Stage 2 8-Injector Setup
Fully Built by Early August 2003
2GNT Member #32

Well your problem does sound like a cap issue, since it was bubbling out of the cap the seal is not working properly. Try a GST cap and it should fix your issue.

Been there done...wait im still there...:rolleyes

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=4&topic_id=47593&mesg_id=47593&page=

here see if this helps