My hyundai i20 2011 model hatchback is overheating,blowing the coolant out even without thermostat ---i changed top gasket and water pump but still the same--please help me

If you have already checked the radiator, fluids, thermostat, and thermo fans and your 1996 Hyundai Lantra Sportswagon is still overheating, there could be other issues causing the problem. Here are a few other things you can check:

1. Water pump: The water pump is responsible for circulating coolant through the engine and radiator. If the water pump is not functioning properly, it can cause the engine to overheat.
2. Head gasket: The head gasket seals the cylinder head to the engine block. If the head gasket is damaged or fails, it can allow coolant to leak into the engine, which can cause the engine to overheat.
3. Cylinder head: If the cylinder head is cracked or damaged, it can cause the engine to overheat.
4. Engine block: If the engine block is damaged or has a crack, it can cause the engine to overheat.
5. Clogged radiator: If the radiator is clogged with debris, it can prevent the coolant from flowing properly and cause the engine to overheat.

To determine the cause of the overheating problem, it will be necessary to perform a thorough inspection of the engine and related components. If you are unable to locate the source of the problem or are not comfortable attempting to fix it yourself, it is recommended to have the vehicle inspected by a professional mechanic.

While there are a variety of reasons your Hyundai Tucson is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat.

Replace the sensor

That won't cause overheating

About a dozen other issues may

Stop using it before you ruin the motor

Have it proper diagnosed

Timing Belt problem
Ignition Misfires
Blocked Exhaust Converter
Head Gasket Failure
Loss of Coolant
Water Pump
Fuel Trim -problem
Leaking Injectors
EGR issue
Vacuum Leaks

All GM cars from 1994 to on up the 3100/3400 engine is famous for bad intake gaskets. When the gasket goes you loose coolant by either externally outside the engine or internally inside the engine. Check the oil for overfull condition and it will look like bright orange or milkshake color. Also if you drove on it overheating or if its full and overheats right away you also blew a head gasket. A compression test will confirm this. If you replace with good gaskets with the metal and rubber type do not use the plastic cheaper version. Then the intake gasket leak will never happen again.

the water pump is run by the timing belt under the plastic cover. big expensive job. maybe you just need a thermostat. hopfully you didnt blow the head gasket. best of to have an expert take a look before changing stuff for no reason.

OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

Two things would cause this

There is a slow leak and the radiator is low on fluid

Let the vehicle cool down completely and then check the level in the radiator. I bet its pretty low. Top off the radiator with a 50/50 mix of coolant and water. start the vehicle and let it warm up with out the radiator cap on. Keep adding fluid as necessary. While waiting for it to warm up check around for any abvious coolant leaks. Things like hoses, radiator seams, water pump, water inlet/outlet gaskets. If no leaks are found it may be necessary to pressure test the cooling system and even then it might be a slow leak that only occurs when the vehicle is cold.

If the radiator is full than I would suspect that water pump is no longer working or creating enough flow. If the thermostat where stuck you would still get heat. If the water pump is not circulating coolant than you would get no heat and the car would overheat.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

First would be the thermostat. If you have already done so, change the temperature sending unit.

Usually near the thermostat.
By the way, remove the thermostat and drive around with the car. If it still overheats, might have some other problem, like you said, temp sensor, or some kind of electrical problem.

Several things can cause this overheating. Have you recently done a:
1. Check Hoses for Leaks
2. Check Radiator for Leaks --- Also, Change Radiator Cap ( can loose pressure there if
cap is bad)
3. Check Water Pump for Leaks. If Water Pump is bad, you will hear a loud noise from it
4 Complete Tune Up? Should be done at least 1x a Yr. Depending on how much you drive the Vehicle. Includes: Plugs, Plug Wires, Gas Filter, Air Breather Filter, PCV Valve, Adjust Timing,
Check Belts -- see if worn
5. Changed your Thermostat & Gasket and have the correct degree Thermostat in the Vehicle?
6.. Had your Radiator Rod and Cleaned out?
7. Temperture Sending Unit (located near Thermostat) could be bad
8. 02-Sensor (Generally located in the Exhaust Manifold - needs a socket with a space in it
to allow the Socket to fit over this top wire of the 0-2 Sensor )
9. Change oil and oil Filter.
10. Change Gas Tank Cap ---

Do all this yearly ( except the Radiator Rod & Clean ( do every 2-3 yrs), and you should not have
any over-heating nor stalling out, etc. and should pass emissions as well.