Q: Car overheating, low on water but no leaks

asked by on

The other day my car was overheating, so I went to an auto repair shop where they did a cooling system diagnostic test. I was there for 2 hours and when they came out they said it was low on water, but they couldn’t find any leaks. Could you please give me an idea of what I should do next to solve this overheating problem? Thanks

If you have a low coolant condition but there are no external leaks, then the engine is leaking internally. Only a pressure test can reveal where the coolant is leaking, too. The leak may be the head gasket leaking into the combustion chamber of one or more of the cylinders. Have a combustion test done on the cooling system to see if there is combustion gases in the cooling system indicating a blown head gasket. If you want this properly diagnosed in person, a technician from YourMechanic can come to your home or office to inspect your overheating issue and make the correct repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car overheating, low on water but no leaks

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: Replaced my engine. Does the new one need to be adjusted to the higher elevation?

Check all of the sensors and make sure that they are plugged in all the way. The computer system with the sensors are designed to adjust themselves as elevation changes. This is why all vehicles today have computers in them...

Q: Are engine light keeps coming on for a year EGR cooler and EGR valve replaced EGR valve replaced twice light still coming on

You will need to have system scanned for codes first and repair any received codes first. The exhaust pressure sensor may not be reading correctly and would cause the problem you are talking about. Make sure any other codes are...

Q: Rough idling - 1990 Chevrolet G30

This could be an issue with a blown head gasket. This would require a professional mechanic to check engine compression as well. This can occur without causing oil/coolant mixing. If you are still having trouble, a certified technician from YourMechanic...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.