Q: Blue smoke after starting the car

asked by on September 21, 2016

Several days ago I went to start my car and there was a huge amount of bluish smoke when the engine started running. This has never happened before. The car sat for the night before I started it the following morning. What might cause this? Is this a serious issue?

Smoke from engine or exhaust Inspection $79.99 - $89.99 Get a Quote

Blue smoke usually indicates oil getting into the combustion process - not a good thing. If you had your oil changed the day before, check the oil level to make sure it wasn’t over-filled. If you car is accumulating some mileage (nearing 100K for example), it’s possible that the valve stem seals (exhaust) are not sealing well. This normally occurs gradually, with a small amount of blue smoke after an overnight or extended period on non-use. A professional mechanic, like one from YourMechanic, can help diagnose the smoke problem and have it addressed accordingly.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Engine stalled on my 05 ford escape at a light, and would not turn over but after 2 minutes started up like nothing happened

I think you may have a tempermental electrical connection. Maybe in the power distribution box or in the car's ignition switch. You could try looking at the battery terminals or the fuse panel for any apparent corrosion, but you might...

truck wont start unless its jump started. I have put in a new battery and still wont start and acts like the battery is dead.

You say the car will not start from your battery but will from a jump start. This tells me you have a bad connection between the battery and your cable clamp. Remove and clean with a wire brush inside connector...

Has juice but does nothing when you turn the key

Hello. A no crank condition can be caused by a few things. A few common causes are a bad ignition switch, starter relay, or starter. It may be possible that the ignition switch is worn out and no longer functions...

I have a 2007 buick lacrosse my blower motor seized up and i replaced it but some thing else is wrong hvac fuse is good idk where

Was the blower motor resistor replaced ? It may be the problem. The function of the resistor is to regulate the amount of voltage to the blower motor in order to regulate the speed. If straight voltage was applied to...

I was driving the car a few minutes ago the vsa and abs light came on in the dash i turnt the car off to reset it but now it start

Hello, thank you for writing in. The vehicle goes into a safety mode when certain components do not pass the system tests that are run when the car is started. Since the codes were set the last time the vehicle...

Power steering - 2007 Pontiac Grand Prix

Hi. It is very difficult to tell you size of the belts that would needed to eliminate the power steering pump without measuring some things on the car. If I had to guess, you may need a belt that is...

car won't start even after taking it to the dealer

Did you mean to say "the alternator was charging as per the test" when you were relating the dealers comments? It is actually the alternator that charges the battery. I suspect the battery and alternator are really fine - and...

What are the gaskets called that go between the transmission and the transfer case?

Hi there. Usually the gaskets between the transmission and the transfer case are known as the transfer case gasket or the transfer case adapter gasket. The gasket may be listed as the type of transfer case and then followed by...

Reocurring wheel speed sensor failure

Hey there. As you may know, these sensors monitor wheel speed for a variety of the car's onboard systems such as the traction control, ABS, and other systems. When wheel speed sensors go bad, they can cause many problems with...

Related articles

A Buyer’s Guide to the 2012 Mercedes-Benz M-Class
The The 2012 Mercedes-Benz M-Class is a mid-size luxury SUV that combines utility and comfort to make the perfect every day vehicle. It can handle almost any terrain with its all-wheel drive model. Drivers and passengers will experience a quiet...
How Does a Radiator Keep an Engine Cool?
Car radiators cool off your engine and prevent your engine from overheating. Coolant absorbs engine heat and dissipates it through the radiator.
Symptoms of a Bad or Failing Thermostat
Common signs include the temperature gauge reading being very high or changing erratically, engine overheating, and coolant leaks.