Skip the auto shop - Our mechanics make house calls

Q: Car overheated and blew out coolant

asked by on

My car overheated and blew coolant all over. It had already been leaking coolant.

Coolant can leak from a variety of places. The system, when warm, is under pressure; 22 psi on your A4 Quattro. Even when the engine is at normal operating temperature, when a sudden leak occurs, it can “blow” everywhere. If the engine was too hot when the leak occurred, the loss of pressure could have caused the coolant to boil. Adding pressure increases the boiling point; remove the pressure, and it boils instantly. Faulty head gaskets can add even more pressure to the system.

In any case, the entire system will need to be inspected to determine what is leaking. After the leak(s) is/are repaired, the performance of the system will need tested: The radiator, thermostat, cooling fans, and water pump. Consider YourMechanic for an inspection of your overheating issue, and repair - our mechanics provide diagnostics at your home or office.

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!
  1. Home
  2. Questions
  3. Car overheated and blew out coolant

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: Radiator is leaking

Hello! The origin of leaks can sometimes be difficult to see when they run. A qualified technician will perform a cooling system pressure test, which will show exactly where the leak is coming from. Hoses, thermostat and the radiator, are...

Q: 2001 Audi will turn over when jumped, but won't start. Beeps 3 times and says "service". Closest Audi dealer 230 miles away.

If the theft system has been activated then you may have to replace the bad battery and after install turn key to on position without cranking it and wait until the theft light goes out after 3 to 5 minutes...

Q: Car died while driving. What's the cause?

Hello. When the vehicle has been in an accident, there can always be a lot more damage than what appears on the surface. The amount of force the vehicle took when it hit the light most likely started the issues...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.