Skip the auto shop - Our mechanics make house calls

Q: Popping sound in the radiator

asked by on

When the temperature gets high the radiator on the driver's side starts making a popping sound. I can actually see the top of the radiator move a little bit each time that it pops. There's also a gurgling and whooshing sound coming from the upper radiator hose. The car doesn't ever overheat and you can still hear the sounds even after the car is turned off. What could be causing it to make that sound?

My car has 179472 miles.
My car has an automatic transmission.

A: The noise is the coolant is turning into st...

The noise is the coolant is turning into steam due to low amount of coolant to water concentrations. The ratio should be 50% coolant to 50% distilled water or just purchase a 50/50 coolant that is already mixed. Since you say your engine is not overheating then this is the most likely cause of the popping since these engines may get over waters boiling point of 212 degrees F. Have your coolant replaced if it tests with a low boil point meaning it is not mixed correctly. Once it is drained you may want to replace the thermostat also. This is just in case it is not opening all the way or at the correct temperature. If you need help with either of these issues a certified technician from YourMechanic can come to either your home or place of business to make repairs.

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

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: Suspension improvements, maybe problems.

Hi, thanks for writing in. If your vehicle is swaying side to side during turns, it is possible that your sway bar links or sway bar bushings are bad. I would recommend having those checked out by a qualified mechanic...

Q: Car will blow cold air but will not blow heat

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

Q: Battery issues - 2013 Chevrolet Sonic

The battery may not be able to hold a charge because if the battery is dead. In order to check the charging system you will first have to have the battery charged and tested to see if battery needs replaced...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...