Skip the auto shop - Our mechanics make house calls

Q: Brown stuff shooting out of radiator

asked by on

My car is overheating. I have replaced the thermostat and the water pump, but it still overheats. My coolant reservoir is filled with dirt, and brown stuff keeps shooting out of my radiator. Also, my heater only blows cold air.

You could either have air trapped in your cooling system, or you might have a bad head gasket. Based upon your description, I am leaning towards a bad head gasket. Testing the head gasket can be performed with a block test which pulls vapors from the bubbling coolant and turns the fluid a different color if it detects emissions in the coolant. If you would like to have your AC system inspected by a professional, a certified mechanic from YourMechanic can visit your home or office to diagnose the problem and make the needed 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

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Displacement on demand not working.

The 8 to 4 system will automatically default to 8 cylinders if there is any problem that the ECM determines through its programming that it should disable the system. If you are having problems with the oil pressure sensor, it...

Q: How do you extend the life of this transmission?

About the only thing you can do to extend the life would be to service the transmission (fluid/filter replacement) more often than Honda recommends. The filter on this transmission is difficult to access for a normal transmission service. You can...

Q: P0306 code misfire

Hello there, many common faults will cause a cylinder 6 misfire in your 2001 Chevrolet Impala. The most common faults are the spark plugs, plug wires, fuel injectors, vacuum leak, fuel pump, or low cylinder compression. A qualified Technician such...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...