The system should bleed air out by itself with normal driving. It may take several cycles of driving the car until it warms up then letting it cool down completely but it should take care of itself eventually in that regard.

Have you added any water to the system? If so, you may have diluted the anti-freeze too much and need to add anti-freeze. Be sure you add the correct kind of anti-freeze. You don't want to mix the green type with the yellow type. If you are unable to figure this out, take it somewhere to be fixed. We have given you a number of things to consider, so you can discuss them with the repair person and arrive at an intelligent decision. Here are the things to consider doing:

1. Replace pressure cap. Cheap and easy, you can do it.
2. Have anti-freeze checked. Replace or adjust if necessary.
3. Thermostat. Much easier on the 4 cylinder than on the 6 cylinder. If you go through the trouble of removing it to check it, you might as well replace it since the labor is far greater than the cost of the part.
4. Water pump. Expensive and difficult. Don't consider this until all the previously mentioned problems have been ruled out.
5. Head gasket. Very expensive and difficult. Tackle this last.

You are not going to fix this without spending any money, but the best plan is to fix the cheapest things first.

Removing the thermostat is not a good idea. If it's bad, replace it. Driving the car without a thermostat will mean that it never properly warms up in the winter, your gas mileage will be rotten, your heater won't work, your "check engine" light will probably come on and more problems will probably develop,too.

Which engine do you have in that car? 4 cylinder or 6 cylinder? On the 4 cylinder, you can probably change the thermostat yourself with some basic tools. On the 6 it's a big job.

 

its a 6 cylinder also my pressure cap is ok other than the blck inner part is gone broken off i had a machanic check it out and fixed the problem i think when i cover up the lil opening where steam was comin out made this happen but i'll take it to a specialist who will check the thermostat seeing that i live in a hot place the bahamas it never gets cold to the point of the heater . but let me know what u suggest yur the expert.

 

What do you mean by "blck inner part is gone broken off"? If the pressure cap is broken, replace it. A bad cap could be causing all your problems here and it's a cheap and easy repair.

What did you mean by "i think when i cover up the lil opening where steam was comin out"? Did you try to plug that opening up? I hope you didn't succeed in doing that because if you did, you may have pressurized a part of that container that is not supposed to be pressurized and may have damaged it as a result.

Changing the thermostat on the 6 cylinder is a big job.
You better leave that to a mechanic. If you are going to pull out the thremostat to check it, you might as well just put a new one in because of all the labor involved.

How about the anti-freeze? I realize that you are not concerned with having the engine freeze, but the anti-freeze is also necessary to prevent the engine from boiling over. You should not operate the car with only water in the cooling system. Themixture of water combined with anti-freeze raises the boiling point of the water so it will not boil at the normal operating temperature of the car. The chemicals in the anti-freeze are also designed to prevent corrosion of the engine and radiator, so they are very necesssary.

 

ok here is a pic with a label of what is broken from my presure cap well not broken because that part is rubber, http://www.tb-training.co.uk/images/Pcap.gifon the pic the part what is label is the part on my own that is gone it cracked and pulled away from the radiator cap, also it wasnt long i closed up the whole and didnt drive long with it . and i just got me a antifreeze mixed with coolant its call 50/50 is that good enough ? if not i'll get str8 out antifreeze . I had a machanic look at my car and check out all the parts mostly engine and alternator to find y it did run hot and he fixed it and i drove fora long time with it but i think i was only missing antifreeze , please let me know if 50/50 would be good so i can buy something else. Thanks alot for the replies really appricated it.

 

If that rubber part on the pressure cap is broken or torn, then the cap is no good. That rubber part is the part that forms the seal and makes the whole thing work. Get a new cap.

Use 50-50 anti-freeze and water. Do not use 100% anti-freeze. It won't work as well as the 50-50 mixture.

 

Thanks alot u have been a great help,i'll make sure try it all tomorrow and get a new cap. thank u again.

 

hi took a while to come back was really busy with the cares of life, ok i changed the cap and put some 50\50 it didnt boil for the normal runs . I then went a distance about 30 miles or close the water boil again, i then did the mile thing again with the sensor on the water outlet cover it didnt run hot but the water boil but no steam anymore, i then did the 30 miles again sunday and when i reached the car cut off as i turn in the yard. the temperture gage only went to the middle but it cut off seem to run hot i dont even know why when the gage went to the middle but didnt go to running hot. so i moved the sensor again and did the journey back and it didnt run hot but it smells funny like its not a normal smell its a gas mixed with oil funny dont suppose to smell like that kinda thing. maybe u can help onthat part

 

Before you put in the 50-50 antifreeze did you add water? The reason I ask is that if you had been adding water without antifreeze, you probably diluted the existing antifreeze with the water, then when you added the 50-50, the resulting mixture was something less than 50-50 because of the excessive water.
Any decent service facility should be able to test the specific gravity of whatever you've got in there and tell you if you've got the right mixture. Or, you can buy an antifreeze tester (It's just a glass tube like a turkey baster with some floats in it) and test your own.
What do you mean by "so i moved the sensor again"?
I am only guessing about the smell, but hot antifreeze has a peculiar smell, and if yours is boiling out, that could be what you are smelling.
If you are concerned about water in your oil, pull the dipstick and look at it. If it's milky looking, you may have water in there. That could be a sign of a blown head gasket, which could account for the overheating. That's a major repair.

 

thanks for the quick reply and i never added oil the machanic did from i got the crankshaft changed, never even open the oil tank . i also changed the gasket set to be sure did it all so it wont be a problem later gasket set crankshaft is band new like other parts like tensioner and water outlet housing with a new sensor on it. and about the antifreeze water was already in the tank when i add the 50/50 it wasnt much. I changed the radiator cover, I was thinking about draining all the radiator water and coolant and then only add like a bottle or 2 of 50/50 or even 3 to make sure water is out of the system and try again. but about the water outlet sensor i unplug it because the fan wasnt comin on, could the antifreezebe a part of that because its not 50 antifreeze and 50 coolant. please let me know. maybe that is costing the scent.

 

Given what you have told us, I think the best diagnosis is that you have a blown head gasket or a crack in the head. The gasket is most likely. That is not something you'll likely want to do yourself. If you have a friend who is handy, that may be a way to get it done. Otherwise it is going to be an expensive repair to do because it takes quite a few hours to complete. (At shop labor rates, that adds up in a hurry!) The parts alone should cost you between $100 - $200. If you choose to fix it, get the entire "top end" gasket set and replace them all, down to the head gaskets. Before you open the gasket set though, pull the heads off and have them checked by a machine shop for cracks. That way if you decide to scrap the motor, or the whole car because of the cost of the repair, you can return the set.

The boiling is not from overheating, it is leaking from inside the cylinders when the motor is running through a bad head gasket, or a crack. There are no sealers or fluids to fix this problem.

Sorry to be the bearer of expensive news.