Q: White smoke

asked by on

My car is blowing white smoke from my muffler i changed the front gasket cover it doesn't runs hot it actually cranks and sounds very quiet it does jerks and hesitate to pick up speed when it do it jerks a little I was also told it could be the o2 sensor

My car has 166000 miles.
My car has an automatic transmission.

White smoke coming from the exhaust often times indicates a potentially failed cylinder head gasket. Since this impacts the compression in each cylinder, any loss of compression will result in the jerking or hesitation in acceleration you are describing. A blown head gasket may cause a number of different symptoms. Coolant in the engine oil, an engine misfire or oil leaking from the engine could all be symptoms. Each of these symptoms could also have other causes and an actual blown head gasket may show none of the above symptoms. Symptoms will often vary considerably, depending on how the gasket fails. Head gaskets may fail in several different ways. With each failure type different symptoms may result. The symptoms each person sees depend on how and where the head gasket fails. Head gaskets may fail in several different ways. For example, a restricted radiator may cause an engine to overheat, very much the same as a head gasket failure. Often times, intake gaskets will fail causing coolant to leak into the oil.

A warped or cracked cylinder head will also produce the exact symptom of a blown head gasket. An external inspection is the only way to determine if the problem is head gasket related. This may mean a blown gasket, warped or cracked cylinder head or other problems in the area. For instance corrosion on the head gasket surface will cause leakage, though technically not a blown gasket. I would recommend having an expert from YourMechanic come to your location to properly diagnose the symptoms you describe.

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. Q: White smoke

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: Can I add Lucas oil "transmission fix" to my transmission fluid to see if it helps my issue.

Adding an additive to the transmission to try and fix a problem will not work in most instances and should only be used as a last resort before getting a transmission overhaul.

Q: Stalls out while driving, then dies and restarts after trying a few times. Drives for a little then dies again

Hi there, thanks for writing in. I suggest you have the fuel pump checked for loss of pressure. The additive the previous owner added in may have damaged the pump and or the filter. If you first remove the fuel...

Q: I have a honda odssey the message appear chek fuel cap.I change the new cap still the same message appear

You will need to have the computer checked for codes since a leaking in the fuel vapor system can cause the vehicle to think the cap is leaking. You may have a bad or leaking vapor vent or purge valve....

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.