Q: coolant coming out of radiator cap.

asked by on

My coolant is coming out of the radiator cap when the cap is off the car overheats but theres no smoke coming out the exhaust and the oil is not mixing with the coolant.

My car has 120000 miles.
My car has an automatic transmission.

Hello. If the engine is overheating then there can be a number of things going on. I usually test the radiator cap, the thermostat, and the cooling fans. Any of these can fail and cause this. If these have been replaced then it may be an internal engine issue. If the head gasket fails it can cause overheating without the smoke or water mixing with oil. A block test needs to be done first. If you want to have this done, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your overheating leak firsthand.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. coolant coming out of radiator cap.

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: There's This hose looking thing behind the rotor busted what might it be

Hi there. It is more than likely that the hose thing is a brake line connection from the caliper to the master cylinder. Regardless of what the actual part is called, if your brakes and power steering are not working,...

Q: how to tell if the egr is bad off he vehicle

Hi there. Checking the EGR (exhaust gas recirculation) valve off the vehicle, using a piece of vacuum hose attached to the small vacuum nipple, apply vacuum to the diaphragm (suck on the hose) which should move the valve to the...

Q: Drove my truck on low transmission fluid..

Hello there, thank you for asking about your 1993 Chevrolet C1500. Running it low on fluid can ruin the rubber seals, bearings and clutches that rely on the fluid to keep it lubricated and cool. Identify the leak first and...

Related articles

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...
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.
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.