Skip the auto shop - Our mechanics make house calls

Q: coolant bursts out of tank

asked by on

the car overheats and the pressure of the coolant or water bursts out of the coolant tank until empty. i replaced my water pump and radiator in 2014 and a few days ago replaced my thermostat

My car has 203000 miles.
My car has an automatic transmission.

A: I'm afraid the news will not be good. T...

I'm afraid the news will not be good. The symptoms you are describing points towards the head gasket(s). The gasket fails in between cylinders on the engines, I have seen them do this. When the gasket fails, pressure from the combustion chamber leaks into the cooling system.

Coolant can also be drawn into the cylinder on the intake stroke. This results in white smoke from the exhaust. There are some tests that can be done before the engine is taken apart. Check the engine oil for coolant. A shop can use a tailpipe emissions tester to measure the amount of hydrocarbon is the cooling system.

This job can become very expensive if problems are found with the cylinder head, or with a lot of other things. This is major engine work, but this job is only the top half on the engine. Overheating an engine just once or twice can damage many things.

If there is coolant in the oil, and the engine is run like this, the lower end can be damaged. I don't want to scare you, but I've seen head gaskets done, the engine runs great for a week, and then it starts knocking and is pretty much ruined. I'd suggest have a certified mechanic inspect your overheating issue to see if it looks to be repairable, but you might want to explore other options such as a remanufactured engine, or another car.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Pulsating Lights

The battery and charging system is most likely the malfunction. If the battery is shorting out internally it would cause the alternator to not charge. There is a technical bulletin about not using re-manufactured alternators on these cars since they...

Q: AC takes a long time to get cold.

Hello. This vehicle originally may have been equipped with R-12 Freon and has been converted to R-134A Freon. If this is the case, the system will leak out the R-134A Freon over time out of the seals, hoses, and compressor...

Q: Extremely low oil & knocking noise

If the engine is to the point of making knocking sounds, there is probably internal damage at this point due to the low oil level. If the crankshaft is scored from lack of oil, then oil pressure will not return...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.