Skip the auto shop - Our mechanics make house calls

Q: Car keeps overheating and losing antifreeze. Thermostat and hoses are all fine. What else could it be?

asked by on

the car keeps overheating and losing antifreeze. i checked the hoses and the thermostat. Engine oil looks normal. there is also a rattling sound when driven. everything i checked is fine but still overheats. what else could it be?

My car has 130000 miles.
My car has an automatic transmission.

Hi. I believe your Hyundai has a blown head gasket. This failure mode may not contaminate engine oil with coolant as sometimes occurs. The lost coolant may go into the cylinder or the exhaust instead. A slightly sweet smell from the exhaust pipe, with or without white smoke/steam would confirm this diagnosis. A certified technician from YourMechanic can come to your car’s location to inspect the overheating problem and pinpoint any faults that need repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Car keeps overheating and losing antifreeze. Thermostat and hoses are all fine. What else could it be?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a front right air suspension problem. The air strut will not raise when the car starts up.

This suspension system on your vehicle uses hydraulic fluid that supports the vehicle and different valves to control the active suspension. The right front unit showing any signs of leakage on the boot should be replaced. This vehicle may be...

Q: My vehicle is overheating and the overheating light comes on. What could that be?

Hi there. If the engine is overheating and the light is coming on, then either the engine is overheating from a faulty thermostat, water pump, or burned head gasket, or the coolant temperature sensor is not working properly. Check the...

Q: Over heating

Hi there: Overheating is a serious problem that can result in extensive engine damage if the source is not determined and repaired quickly. This problem is commonly caused by many different failures, from a faulty water pump, damaged thermostat, broken...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...