Q: Coolant leaking from reservoir

asked by on

The car was running good until I heard something pop. When I checked under the hood, I saw that the radiator neck was broken and the hose was detached. I had the radiator replaced and the car drove fine after that with no warnings. If I drive more than two miles, the car overheats. The coolant leaks from the reservoir, but I am not sure why.

Hello. It sounds like when the radiator neck broke off, the engine got overheated. It is common on most modern cars that have aluminum cylinder heads the head gasket will fail soon after overheating. If your head gaskets have failed, this would cause overheating and coolant loss. There are some tests that can be done to see if the head gasket is blown. The easiest one to look at is the coolant’s color. If the gasket has failed bad enough, the coolant will have mixed with the oil giving off the color of chocolate milk. If your car has a dipstick, pull the dipstick and see if it looks like chocolate milk. If it looks like regular oil (clear tan to a black), the other testing must be performed. Since some of this testing will require a running engine and might have to do with hot coolant, a mechanic may be needed to confirm a blown head gasket.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Coolant leaking from reservoir

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: Q: Low Tire Pressure light is on

You need to reset your TPMS system. This is done through the controls on your steering column. Consult your vehicle owners manual or look for a simple "how to" video such as this one here. If the system still will...

Q: Poured coolant in engine, now it won't run.

Hello. If you poured anti-freeze into the engine crank case, then it may very well be possible that a serious mechanical issue has occurred. If any water or antifreeze find their way into the engine, they can contaminate the oil...

Q: My 2001 BMW 740 IL Transmission Failsafe light came on when I put the car into drive

Your car has an electronically controlled transmission. If the controller detects a fault in the transmission it goes into failsafe mode to "work around" the problem. It might for instance skip a gear that it finds to be a problem...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.