Overheating hot light came on pulled over took off water cap anti-freeze bubbled out.

Use anit-freeze anti-boil additive in the radiator at the correct percentage as it stops bubbles forming on the hot bits of the engine and allows for more efficient cooling of the block and head and stops the block freezing when the ambient temperature drops too low.. It also stops corrosion in the coolant parts. Some additives will not mix with bars or others so be careful when adding anything to the system.

maybe you have a blown head gasket your leaking head gasket when ur car is cold open your radiator cap see if the coolant in it try to tap up coolant until the neck of your radiator then start your engine and observe the radiator neck if the collant puks it out if your coolant is pukking out meaning you have a leak or blown head gasket and thats the cuz of your overheating

Hi Manuel, That warning light indicates the coolant level is low. To attend the problem make sure the engine is cold. Open the filer cap and the bleeding nipple. Open the cabin heater control to fully hot and fill until all air bubbles have been evacuated from the cooling system (top up with the required mixture of water and coolant/anti freeze, about 40 percent coolant sixty water) When all bubbles have been evacuated, close the bleed nipple and replace the filler cap. Set the cabin temperature as required. If coolant is at correct level and system has been bled it is possible the sender unit may have become defective. Regards John

try to overhaul the radiator ,try to replace the radiator cap w/ new ones,try not to fill the water reservoir leave some space so when it boils air can easily rotate,if still doesn't work maybe u need to replace the cylinder gasket cause it also causes an overheating if it does have defect,or try to check water pump maybe its not working or has a problem

Is anti-freeze bubbling over into the overflow? If so your thermostat is not opening.

Make sure your coolant system is filled to capacity. Make sure there isn't air trapped in the system. If so you may see hose collapse. Burp the system by starting the car and running it with the radiator cap off while topping it off with anti-freeze. If there is air trapped you will see bubbles surface up with the cap off.

Check the water pump. Squeeze the hoses and feel for pressure. If the pump is working the hoses will feel full.

white smoke is caused by-- water or anti-freeze entering cylinder . if in radiator or the overflow tank. it will look like a chocolate milk shake. check on oil dipstick for traces of water or anti-freeze. also, a bad head gasket will let water or anti-freeze in combustion area. head gasket symtoms if bad. Symptom #1: Chronic Engine Overheating
Symptom #2: Significant Drop in Coolant Level Symptom #3: Mixing of Coolant and Engine Oil
Symptom #4: White Smoke from Exhaust Pipe
popping of overflow cap Symptom #6: Air Bubbles in Radiator
Symptom #7: Engine Lacks Power GOOD-DAY!

There are several possible causes. Start with the cheapest solution.

1. If you are using water instead of anti-freeze, the water will boil and will get pushed into the overflow tank. Replace the water with anti-freeze.

2. The radiator cap could be bad, allowing hot coolant to exit the radiator and flow into the overflow tank. Have the cap tested or just replace it. It's a cheap item.

3. A leaky head gasket is allowing combustion gases to pressurize the cooling system, which pushes the coolant past the radiator cap. You can easily diagnose this by carefully removing the radiator cap and, with the engine running, observing if there is a continuous stream of bubbles in the coolant. These bubbles are exhaust gas, and you will need to replace the head gasket.

sounds as if you may have a blown head gasket if the anti-freeze is coming out of the radiator when you pull the cap off.

Could be vapor lock, or air lock/bubble. First make sure the coolant is topped off, never do this when the car is hot! Take off the radiator cap and poor in anti-freeze, replace cap, now start the vehicle COLD remove cap and pour in more anti freeze if needed. When the engine runs it will **** anti-freeze(coolant) and therefore you may need to pour in a little more. Now wait until the car is hot and check for heat. If you have ever heard a gargling sound or bubbling when you turn your car off, this is a sign of low coolant and or air lock. If you still do not have heat, make sure your coolant lines by the engine are connected as well as any electrical wires going to your temp control valve located between your coolant hoses where coolant runs through it. If you still do not have heat, your water pump may be failing, how ever if your engine does not overheat, then do not replace it. Lastly there is a control valve that opens and closes a flap door to allow/block heat. If this controller failed then you will need to have it replaced.