Q: Leaking coolant and white smoke from radiator cap

asked by on

Hello i drive a 2003 Civic.

I notice after about 5-10 minutes of driving white smoke coming from the radiator cap.

I also notice that i am losing coolant as it sprays out from the radiator cap.

Would changing the radiator cap be worth a shot or is it something more serious like a blown head gasket?

Thank you

My car has 161500 miles.
My car has an automatic transmission.

Hi there. A blown head gasket is typically the result of an overheating situation, not the cause. So, if your engine has been overheating recently, it’s possible that engine damage has occurred. However, it is more likely that the radiator cap itself is damaged or not sealing correctly. However, if you’re losing coolant, it might be best to have a professional mobile mechanic come to your location to complete a fluid leaking inspection to verify the source of this issue, so the right repairs will be made.

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. Leaking coolant and white smoke from 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: Loud pop and started running hot

A possibility is a head gasket leak where exhaust gas leaks into the cooling system pressurizing the cooling system and blowing out a hose. However, there are other potential, less serious, causes for what you describe. To get the actual...

Q: Bumper and hood replacement cost? 2001 Honda Civic

Hi there - this task is best handled by a collision repair estimator at a reputable paint and body shop. S/he is trained to evaluate visible and not-so-visible damage, and the costs to repair. Contact a reputable paint and body...

Q: Hi. I have a question about brake/rotor replacement on my 2005 Honda Element.

The front and rear brake pads are a different part and should not be rotated even if they were the same. This is the first time I have heard anyone say this in my 35 years as a master mechanic....

Related articles

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...
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.