Skip the auto shop - Our mechanics make house calls

Q: Cooling

asked by on

I have noticed a puddle under my car after I drive it and it gets up to running temp. And it turns out to be coolant , it's almost directly under the reservoir . But the thing is it only leaks after I drive it . When the engine is cool it doesn't leak. What could this be . Also when I got home today and turned the car off , I heard a bubbling sound and I popped the hood and the coolant in the reservoir was bubbling . But it wasn't boiling like there was air in the system I think. Please help

My car has 191000 miles.
My car has an automatic transmission.

You may just have a cap that is leaking pressure. Coolant systems are designed to work under pressure, and if the coolant overflow bottle is leaking or the cap is not holding pressure, then it will release coolant. The most common problem is the cap seal leaking, but it should be tested along with the cap to make sure you do not have any leaks in the system. Make sure not to over fill the cooling system above the cold fill line. Replace the cap and have the system pressure tested for leaks.

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: coolant overflow and overheating

If your dash gauge showing engine temperature is working properly and the gauge shows normal temperature, a possible cause of the "overheating" you are describing is a faulty radiator pressure cap. The radiator cap is designed to maintain a closed...

Q: I'm buying a used 2004 g35 coupe sport with 107k miles from a private seller but I'm not sure weather the car will work in the lon

Hi there. The problem with purchasing a mid-level luxury vehicle like an Infinity is that they are often overpriced vs. the actual value of the vehicle. Anytime you purchase a used vehicle from a private owner, it's a great idea...

Q: Overheating after accident

Hello, If the vehicle is overheating it is best not to drive or run the vehicle to avoid any further damage to the engine. Being that the front end is damaged, it may not be possible to install a new...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.