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The water in radiator is disappearing and I can find where it’s leaking an it’s always overheating. I changed the theromast but still leaks
@momalisa,Lisa , The most likely reason when not seeing evidence of leaking coolant on the ground or in the engine compartment is that the engine is leaking internally because of a failed gasket(head/intake) or a cracked engine block/cylinder. this type of leak will also cause engine to over heat as it is adding air into the system not allowing coolant to circulate. Some times if you check your oil, you will see the oil level up on the dipstick or foaming on the oil fill cap and another sign can be whitish smoke/steam more then normal from the exhaust pipe. If you take it into a good local mechanics shop they can perform a coolant system leak down test and find the fault and estimate the repair. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.