Skip the auto shop - Our mechanics make house calls

Q: Car overheating, rust-like residue leaking out

asked by on

My car has overheating problems. There is a residue coming out of it that has a brownish color, similar to rust. I had it flushed several times. The thermostat has been changed. Also, I had the water pump replaced. What could be the problem?

The engine may have a head gasket leak. The residue you see is from the combustion from the engine getting into the radiator cooling system. A combustion test done on the radiator should be done to see if you have a blown head gasket. If you need help with this, a certified technician from YourMechanic can come to your car’s location to diagnose the overheating issue and help you move forward with 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: I put accidentally in reverse gear while driving foward

Hello. I think you should be okay to drive for now. You may have not initially caused any damage, however, I would recommend keeping an eye on things and paying special attention to the way it drives and to any...

Q: Water pump / still over heating

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...

Q: New water pump new thro new cap still over heating

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. Since you have just replaced the thermostat, water pump and head gasket, we can eliminate those unless...

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...
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...
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.