Skip the auto shop - Our mechanics make house calls

Q: White smoke coming from tailpipe

asked by on

I see white smoke coming from the tailpipe.

Hi! The white smoke is a sign that the engines head gasket has blown and is leaking coolant into the combustion chamber. The coolant leaked into the hot combustion chamber then burns off in the form of white smoke exiting the muffler. I would test the head gasket with a head gasket coolant tester. If the head gasket leaks coolant, the coolant will pick up traces of exhaust gas which can cause the white smoke that you are seeing. The head gasket coolant tester will indicate if there are in fact exhaust gases present in the coolant. I would recommend having a certified mechanic diagnose your smoke issue to determine what actions to move forward with.

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: Is it expensive to change my crank sensor?

Hello. Most of the time when this occurs on this vehicle it is caused by a failing crankshaft position sensor. These will fail intermittently on this engine and cause these same symptoms. It can also be an issue with the...

Q: Ticking noise becoming faster with higher RPMs

Hi there. In most cases, if this happened all of a sudden and went away after a moment, then it may just be low on oil or it may need an oil change. I would check the oil first. If...

Q: My 2004 elantra's heating system is blowing cold air -overheating smoking -filled collant refilled still overheating /smoking -wha

Hello. Overheating can be caused by many things. The first thing I would do is make sure that the system is properly filled and bled. If there is any air bubbles in the system, or the system is low on...

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...
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...