The coolant starts to boil in the reservoir and starts to steam outt out from the coolant reservoir overflow.. it starts to do this when it reaches normal temperature.. i have tried changing the cap! and changing the thermostat!!!!i have also tried flushing the coolant and letting the air out from the bleeder on the thermostat housing.!! it still does the same thing dont know waht else to do?? what else could it be??

 

Just a tip, if it's boiling out it's not normal temprature. Is the fan coming on before it starts boiling?

 

the fan kicks on after it starts boiling... i thought it could just be air in the coolant system..so i keep trying to bleed it .. no luck...

 

Almost seems like a clogged coolant passage, or the water pump isn't circulating the coolant around. Best case is something a flush can fix, worse case is symptoms of major engine trouble.

How does your oil look?

 

the oil seems to look fine I had just done an oil change on it no signs of coolant mixed with it.. I also flushed out the radiator with the water hose...

 

You need to take it in to have a pressure flush done. A hose isn't going to create force enough to flush the system if there is a serious blockage. A clog that is deep in the system or in the heater core is going to need a pressurized system to ensure that everything is flowing correctly.

 

Fan should kick on before water is boiling. Have you replaced the water temp sensor? Sounds like it's not kicking the fan on when it needs to . Also showing normal temp when the water is clearly above 212F. Make sure to put antifreeze in there after you get it fixed. Water alone is not enough.

 

I had changed the coolant temperature sensor on the thermostat housing before..,,,I havent checked da temperature of the coolant while its boiling.. ill try that next.. thanks for all the advice!!!!

 

How fast does temperature rise? I mean from cold start to warm up.
You might have a blown head gasket.

 

If you know how, I would consider hotwiring the fan to keep it on 100% of the time then either let it run in the driveway or drive it around the block until the motor heats up and see if you have the same problem. If it goes away then you know where your problem is. If it continues then you know you have something else wrong....like the above suggestion, possibly a head gasket but that won't necessarily cause the water to boil over.