Q: Car leaks coolant when left overnight

asked by on

I purchased my vehicle several days ago and i noticed theres a coolant leak. The engine runs fine and never overheats. I notice the leak when i park it overnight on my driveway. I looked around the engine bay and i noticed that on top of the coolant reservoir it seemed like it had some coolant leaking. The coolant levels are where they're supposed to be but the amount leaking is more than what is coming out of there. Also the previous owner mentioned that he had replaced the radiator recently.

My car has 150000 miles.
My car has an automatic transmission.

Hi there. In some instances, after a radiator is replaced, a coolant line can be left loose by accident or can come loose as the hose clamp gets hot. If the car is parked on a slight uphill slope, the radiator coolant might be leaking from one of the top cooling lines or from the radiator overflow reservoir hose.

The best way to know exactly where your vehicle is leaking coolant from is to have a local mechanic, such as one from YourMechanic, come to your location to complete an inspection to determine the source of the leak.

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. Car leaks coolant when left overnight

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: Coolant disappearing for radiator.

If your car overheated and you are loosing coolant but no leaks are found the coolant is going somewhere. The place it is going is into the engine. The heads may be warped and the head gasket is leaking coolant...

Q: Rough idling after new water pump and head gaskets. What now?

You have covered nearly all of the symptoms of what is normally a blown head gasket. Occasionally, when the computer reads a series of codes related to one issue when another is not immediately present and then the trouble codes...

Q: My car starts up and runs about 15 minutes & dies, after15 minutes it will start right back up, i noticed the fan not turning on 2

Hello there. Unfortunately, there are many faults that could cause your 2004 Chevrolet Aveo to stall and die after 15 minutes. Common faults are the battery, alternator, fuel pump, fuel filter, battery cable, coil, or a wiring harness fault. The...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...