I realise my engine lights comes on high coolant temp and when i opened the hood ,the coolant was dripping from the container you fill it at,can you please tell me possible problems

no thermostat is good that old./ ever.
and the hose does not get water coolant from thermostat until the engine is hot and thermostat is opens( begin to open)
you forgot to burp all air from the cooling loop.
you are doing all this wrong.
well the reservoir goes empty when you do it all wrong, get all air of the loop first. then fill reservoir 1/2full of 50a%AF (antifreeze)mix.
the thermosat not installed backwards and STAT bleed hole (jigglepin)
must be up hill. (so it can be burped)
once properly filled of coolant, any leaks are seen clear as day
hood up(not driven) and let engine warm fully up and like magic
all leaks are seen , if present. and from the exact spot , is what matters most. (you never said where, only below crank pulley)
sorry the crank is not water cooled. look again and look closer
let engine idle up to 30 min to find the leak.




other than hoses or water pump leaks.
here are all front engine leaks possible
yellow arrow

F= freeze/core plug, x2
up top is a leaking intake manifold gasket (common too)

No , their arn't two coolant temp. sensors . One near the thermostat housing . The Temp sensor is a input to the PCM / ECM . The PCM / ECM needs the temp info for fuel calculations . The temp gauge on the instrument cluster gets this info over class 2 serial data network Hooking up a factory or professional scan tool that can read sensor data is the easy way to diagnose ,not guessing . Looking at factory service info. an wiring diagrams too see what is what is another way . You have no clue ,take it to a qualified repair shop.

The engine coolant temperature sensor is a thermistor (a resistor which changes value based on temperature) mounted in the engine coolant stream. Low coolant temperature produces a high resistance (100,000 ohms at -40°C/-40°F) while high temperature causes low resistance (70 ohms at 130°C/266°F).
The PCM supplies a 5 volt signal to the engine coolant temperature sensor through a resistor in the PCM and measures the voltage. The voltage will be high when the engine is cold, and low when the engine is hot. By measuring the voltage, the PCM calculates the engine coolant temperature. Engine coolant temperature affects most systems the PCM controls.
The scan tool displays engine coolant temperature in degrees. After engine startup, the temperature should rise steadily to about 90°C (194°F) then stabilize when thermostat opens. If the engine has not been run for several hours (overnight), the engine coolant temperature and intake air temperature displays should be close to each other. A hard fault in the engine coolant sensor circuit should set DTC P0117 or DTC P0118; an intermittent fault should set a DTC P1114 or P1115. The DTC Diagnostic Aids also contains a chart to check for sensor resistance values relative to temperature.
The ECT sensor also contains another circuit which is used to operate the engine coolant temperature gauge located in the instrument panel.

No your car will not overheat, but it is advisable to my 50% coolant on the water to prevent deposits of rust and other debris that may affect the effectiveness of the cooling system.

Where is the white smoke coming from? Under hood? Out tail pipe? If excessive white smoke from tail pipe, suspect a head gasket failure which in turn will fill the cooling system with exhaust pressure forcing the coolant to come out of the reservoir and resulting in an overheating problem

Might be the water pump! Take it back and tell them they need to do it right.

There may be a thermostat problem, but your symtoms indicate low coolant level. When coolant is too low, it will not circulate, so you get no heat in car, and the coolant remaining in engine block overheats because no cool fluid coming in.
You need to fill the system up properly then look for leaks.
With cold engine, open radiator cap. Fill with antifreeze directly in radiator. Start engine, top up rad if level drops. Put heat control on Hot. Fan on low, heat on high. Gently rev engine and top up rad as needed. IF as engine heats up, it starts kicking fuild violently out of radiator, then the thermostat is bad. if not, then recap radiator, top up overflow bottle and you're done. Look under car for any sign of leaks. Steady dripping indicates a leak, then address that.

Possible coolant leak on hot engine parts causing it to evaporate as it leaks. That would definitely invade the cabin air. You would need to carefully check under the hood with the engine warmed up and running.

Also could be a headgasket failure between coolant channels and a combustion chamber. This latter problem sometimes shows itself as vapor at the tailpipe after there should be no more visible. You may also detect the odor of coolant there too.

4.0L engines are known for radiator leaks. look at the back side of the radiator for dried coolant. It will appear as a green or yellowish film on the radiator. if you don't see anything there top it off with water and let it sit and idle (A/C off) while you watch for it to start dripping. when water starts to drip on the ground open the hood and look for where the water coming from. Then you know what needs replaced.

hi,
how far away is the repairman? if its less than 2 miles then go ahead. fill up the coolant reservoir AND the radiator locate the radiator cap and fill it too. I dont recommend doing it if you cant fill up the radiator. go early in the morning before it gets hot. if it starts to boil shut it off at the lights. take extra water with you and a rag or gloves and of course the phone. good luck

change the thermostat and the temp gauge in the radiator