sudden loss of coolant

asked by on

2 days ago I filled up on gas then started to drive. Car seemed to accelerate through gear change then drove normally. 1st stop was 1 mile, then drove another 1/2 mile to the post office. I smelled antifreeze and saw white smoke through the front of the hood. When I opened the hood, I had lost all coolant in the resevoir. It was dark and I could not pin point where the leak was. the resevoir was cool to the touch so I added antifreeze and drove home - about 1.25 miles. I have not driven the car in 2 days but the coolant resevoir has maintained the added coolant from 2 days ago. Is it safe to drive?

My car has 160488 miles.
My car has an automatic transmission.

Hi Felicity. Thanks for sending in your question today. Assuming that your Chrysler 300 did not overheat previously and coolant is leaking internally, it’s quite possible that your radiator cap has failed. This will cause coolant to escape in the method in which you are describing. However, it’s also possible that you had too much water mixed with coolant, and that the water has evaporated from the mixture when the engine temperature rose. It’s supposed to be a 50/50 mixture of coolant to distilled water. It’s hard for us to tell you - yes or no - whether your car is safe to drive, without knowing the actual cause of this problem. I think the best option here is to have a professional mobile mechanic complete a coolant leaking inspection, so they can determine if there is damage to the coolant system or if the radiator cap simply needs to be replaced.

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

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

Car jerks when shifting gears, check engine light

There are more tests that need to be done before the speed sensor module is replaced. There are about 20 tests that need to be done to verify the number turbine speed sensor is not working properly. These tests are...

Vibration noise when letting off the accelerator

Hello, thank you for writing in. There may be a few different things going on. First and foremost we need to make sure the throttle is not sticking and that the brakes are complete released. If the issue is more...


The excessive pressure causing the hoses to blow off suggests that your cooling system is not flowing properly and that there is a back up of some kind somewhere in the system. This is generally caused by a faulty thermostat...

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...
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...
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...