Q: Q: Why is my car leaking antifreeze?

asked by on

I am filling my antifreeze at least every other day. My heater barely works, and only in the defrost setting. The other night it was about 35 degrees and I drove less than 5 miles and the temperature gauge lit up and the temp was almost maxed out. Every now and then I hear a boiling sound coming from the engine. When I got my car in 2003, I had a coolant leak. A month ago the head gasket was replaced. Before the head gasket got replaced, I smelled burning antifreeze, but that was gone after that problem was dealt with until the temp light went on, then I could smell antifreeze again. Any suggestions?

My car has 130000 miles.
My car has an automatic transmission.

Based on your description it sounds like your engine is overheating and the overheating is accompanied by a coolant leak. Coolant leaks can be both a cause and a consequence of overheating. Consequently, once the leak is repaired, your vehicle will be tested to determine if an overheating condition still exists. In all events, you may have to replace your engine cooling thermostat because episodes of overheating can damage the thermostat. If the thermostat is damaged, and left in place, that can set the stage for future cooling system problems.


Be sure not to drive the car if it is overheating because overheating can warp the cylinder head and/or engine block causing costly damage. The most common causes of overheating include low coolant level (including that due to the leak you are experiencing), a faulty thermostat, a plugged radiator, a faulty radiator pressure cap, collapsed hoses, non functioning cooling fans, and a faulty water pump or drive belt. Certain engine faults, such as a leaking head gasket or poor engine running condition can also cause overheating. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine cooling system leak diagnostic and the responding certified mechanic will deal with the leak identification and repair first and then determine if the car is still overheating. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. Q: Why is my car leaking antifreeze?

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: Temp going up and down and jerking while driving.

The issue seems to be the head gasket is burned on your vehicle. The coolant is getting into the cylinders and the combustion gases are getting into the cooling system. This would explain why the engine would jerk when driving...

Q: Car won't accelerate past a certain speed

You may be having a problem with the A pilar; the sunroof drain could be leaking water into some electrical connections in the driver's side kick panel. The connections for the throttle position pedal sensor are there, which may have...

Q: Check engine code P0420 and P0420p consistently come up even after erased. Slight smell of fuel when car is stationary.

Diagnostic trouble code p0420 is for a catalyst efficiency below threshold. Meaning, the control module is receiving a signal that the oxygen sensor is reading a post converter signal that the catalytic converter isn't doing its job. This could be...

Related articles

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...
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...
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.