Q: I have white/bluish smoke coming out of the exhaust occasionally. I have no power loss and it happens infrequently.

asked by on

I have white/bluish smoke coming out of the exhaust occasionally. I have no power loss and it happens infrequently. I know this has been diagnosed as a valve seal leak but it is not constant and I don't have any power loss. Can thisbe something else or is it time to get major work on the engine?

My car has 140000 miles.

I suggest you study the smoke and try to recognize a pattern. It might mean that you have to spend a lot of time looking in the mirror, so try not to be unsafe. If you are having a problem with valve stem seals, you may experience the smoke more when you are letting your foot off of the gas. Decelerating raises the engine vacuum and draws oil past the valve seals and into the intake where it goes on to be burned. Stem seals will also be the diagnosis if you have a big cloud of smoke on starting a car that has been parked several hours or overnight. If you have a problem with piston rings, you will see more smoke when you are accelerating and demanding more power from the engine. Either way it’s going to be a big expense. Many people prefer to put off the repair until the oil starts to foul the spark plugs and the engine begins to skip. If you want to be sure what is going on with your car, contact Your Mechanic to have a technician come to your home or office to check out your car and give you a recommendation.

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. I have white/bluish smoke coming out of the exhaust occasionally. I have no power loss and it happens infrequently.

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: I can't get my truck out of four wheel drive

Hello. Most of the time this occurs when the actuator in the transfer case fails. If the actuator was not when you went through the puddle then that could cause it to fail from the sudden change of temperature. This...

Q: My BMW M6 is making odd noises in either the transmission or differential

Hi, thanks for writing in. Almost certainly, what you were smelling was the clutch as you suspect. And, both the clutch and the limited slip mechanism in the differential may be damaged. The 2006 M6 Sequential Manual Gearbox ("automatic") is...

Q: White smoke coming from tail pipe.

While vehicle smoke can appear in a wide range of colors, white smoke from the exhaust is often an indication that the car is burning coolant in the engine. Coolant is normally found in the cooling system and can enter...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.