I had a problem similar to yours, where coolant was spitting out and there was a boiling sound coming from the over flow reservoir, and I was told it was my head gasket. I was looking at the radiator cap and noticed that one of the rubber washers was broken, I got another one from the scrap yard and then there was no problems!! Just something to check before you go and get the head gasket changed

Steve J

 

my 95 civic did the same thing, i replaced the thermostat,radator,EVERY thing that had something to do with the coolent system, finally i found out it was a blown head gasket....

 

Take your radiator cap off while the car is cool, start it and let it warm up without the cap. If the coolant level is low, or drops at all during this cycle, top it off. If it spills out, so what. If it spills out and it's being pushed out by escaping exaust, it's a head gasket. Usually, you can see exhaust gas escaping. Like '93TurboD said, you can use a gas analyzer (any shop with a dyno will have one), but it's usually visible. Coolant shouldn't continue to spill out of the car until it boils. Exhaust gasses should be escaping even when it's cold (if this is your problem).

Pressure testing your radiator can also help diagnose your head gasket.

Oil floating in the coolant overflow bottle is a really bad sign as well.

 

Well got a new timing belt and water pump installed.
Also pulled the radiator and blew out all the dead bugs and stuck rocks in it.
I'll see how it acts. So far so good.
I'll keep you guys posted.
Thanks again for all the info.

 

My radiator was doing that yesterday, all I did was get a new radiator cap and my p cap was off. I'm calling it a p cap because the word totally just left my head...its a long word that starts with p.