If you see blue smoke coming out of exhaust after you have parked your car for a while and the engine is not a diesel, the probable culprit is Bad Valve Seals. Each engine has valves that open and close. These Valves are manufactured to open mechanically by pressure from a Rocker Arm. They let air and gasoline come into the engine.

Is blue smoke from exhaust bad?

Blue smoke from a car exhaust is generally a bad sign, and the cause of it will need to be repaired as soon as possible. In petrol cars, it might suggest that oil is leaking into the engine block where the fuel is mixed with air, while in diesel cars it may simply suggest that there is too much oil in the engine.

Why does my car smoke blue when I accelerate?

Blue Smoke From Exhaust When Accelerating

When blue smoke is emitted from a car's exhaust pipe, this usually indicates that a leak in the engine's valve seals is allowing oil to leak into the combustion chamber where it is being burned along with the fuel. This may be due to natural deterioration or a faulty part.

How much does it cost to fix blue smoke from exhaust?

The Cost of Fixing your Blue Smoke Problem

If you aren't that handy with a wrench, the part will probably cost $80 from a shop, then factor in $500 +/- for labor. It's pretty expensive, but cheaper than a totaled car or a new engine!

Related Question what causes blue smoke from exhaust

How do I stop my car from smoking blue?

Can a bad EGR valve cause blue smoke?

The exhaust gas recirculation (EGR) valve might be sticking occasionally and ti can give you blue smoke, when it sticks open it allows in spent exhaust gases which interfere with the combustion process but usually gives other symptoms like rough idle and possible EML warnings.

Can bad spark plugs cause blue smoke?

The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs.

Can a bad O2 sensor cause blue smoke?

When operating properly, the O2 sensor cannot cause your engine to smoke. If your car runs excessively lean for an extended period of time, you could cause serious engine damage, resulting in black, white or blue smoke from the exhaust, but usually you will be alerted to other symptoms first, such as rough running.

Can overfilling oil cause blue smoke?

In the case of bluish white smoke, the sump may have been overfilled with oil, and the excess oil is being dragged up the cylinder wall and into the combustion chamber by the overpressurizing of the crankcase.

Is Blue smoke a gas or oil?

Blue Exhaust Smoke

If you are noticing blue smoke from the exhaust, it means your engine is burning oil due to an oil leak. This symptom could be the result of a leaking valve seal or a problem with a piston ring.

Does synthetic oil burn blue smoke?

Smoke coming from the exhaust after a vehicle has warmed up is attributed to oil burning during the combustion process. A switch to a more stable, synthetic oil would be the way to stop a blue-tinged smoke from emerging from the exhaust. It will likely lead to the area of the engine causing the smoke.

What are signs of a blown head gasket?

Bad head gasket symptoms

  • White smoke coming from the tailpipe.
  • unexplained coolant loss with no leaks.
  • Milky white coloration in the oil.
  • Engine overheating.
  • What does head gasket smoke look like?

    White Exhaust Smoke

    White smoke billowing out of your exhaust means that coolant is likely leaking into the cylinders. This usually happens when there has been a breach in the head gasket, which makes the coolant create this white steam. Have it taken care of before the breach gets bigger and bigger.

    Why is my car smoking but not overheating?

    The most common answer to, “Why is my car smoking but not overheating?” is that there's a type of fluid that's landed on the engine. This can be motor oil, fuel, transmission fluid, coolant, or even condensation. It can cause your engine to smoke because it's burning off that fluid from the engine.

    Will seafoam stop Blue smoke?

    Blue smoke is most often produced when oil leaks into the engine's cylinders and burns as part of the combustion process. If this is the case, it's not a permanent problem and after the Seafoam runs its course the blue smoke should disappear.

    Can a bad valve cover gasket cause exhaust smoke?

    Smoke coming from under the hood: Most valve cover gaskets are located at or near the top of the engine. As the valve cover leaks, the oil will end up running down the side of the engine and it will get onto the exhaust. When this occurs, you will see smoke coming from under the hood.

    What are the signs of a bad EGR valve?

    What are the symptoms of a failing EGR valve?

  • Your engine has a rough idle.
  • Your car has poor performance.
  • You have increased fuel consumption.
  • Your car frequently stalls when idling.
  • You can smell fuel.
  • Your engine management light stays on.
  • Your car produces more emissions.
  • You hear knocking noises coming from the engine.
  • Can a vacuum leak cause exhaust smoke?

    When we look at the transmission fluid issue, white smoke is present when the engine sucks fluid through its vacuum hoses. This usually is bad news as the leak gets mixed with the engine oil therefore it contaminates it which results in white smoke.

    Will thicker oil stop smoking?

    No it won't reduce the smoking. Heavier weight oil will increase the oil pressure as long as the oil is cold but as soon as it warms up, you're back to square one.

    What are the symptoms of a bad oxygen sensor?

    Here are some of the most common signs that your oxygen sensor is bad.

  • A Glowing Check Engine Light. The bright orange Check Engine light in your dashboard will usually glow if you have a bad oxygen sensor.
  • Bad Gas Mileage.
  • An Engine That Sounds Rough.
  • An Emissions Test Failure.
  • An Older Vehicle.
  • Can running lean cause smoke?

    Registered. running lean may not smoke at the time, but afterwards it will. running lean or hot will damage engine parts..and it doesn't take long for damage to occur.

    Can a bad PCV cause smoke on startup?

    White smoke on startup is a very good indication of a bad PCV valve. Someone must be pretty new to automobiles for not checking it first. It's typically the first step in the troubleshooting process.

    What does GREY smoke mean?

    White smoke can often mean material is off-gassing moisture and water vapor, meaning the fire is just starting to consume material. Grey smoke can indicate that the fire is slowing down and running out of materials to burn.

    Can wrong engine oil cause smoke?

    Using synthetic oil in the wrong engine can cause gaskets and seals to leak. Oil leaks accumulating under the car and white smoke coming from the exhaust could be signs that you've used the wrong oil.

    How do I stop my engine from smoking at startup?

    Why is smoke coming from my exhaust?

    Many times, this thick smoke is due to the likes of a blown head gasket, damaged cylinder, or a cracked engine block, which is causing coolant to burn. Thick white exhaust smoke usually indicates a coolant leak, which could cause overheating and put your engine at a serious risk of damage.

    What color should exhaust smoke be?

    It is considered normal when the exhaust coming from your vehicle is light or thin white. This type of smoke is usually just water vapor. You will notice it when you first start your vehicle, especially on cold days. The reason for this form of exhaust is that condensation collects naturally in the exhaust system.

    Why does smoke come out of my exhaust when I accelerate?

    If you continue to see white smoke coming out of the pipe after the engine has had a chance to warm up or while accelerating, then your coolant might be leaking internally. This is how the exhaust smoke ends up turning white. The combination of the coolant and engine oil will create a milky appearance in the smoke.

    Does engine restore stop smoke?

    If your engine is burning oil and smoking because of blow-by, RESTORE will solve that problem too. RESTORE also works to quiet start-up piston knock, piston slap, and noisy valve lifter ticking.

    Can too much oil cause white smoke from exhaust?

    If thick, white smoke comes out the exhaust pipe, this can be an indication that there is too much oil in the engine. This may also be antifreeze burning, so it is best to take the car to the mechanic, because any of the causes of the smoke can be disastrous for the car.

    Will synthetic oil burn less?

    MYTH: Synthetic oils are too thin and can create blow-by and oil burn-off in older cars. Synthetic motor oils do not affect seals and will not be the cause of blow-by or oil burn-off in an older engine. Just like conventional motor oil, synthetic oils have a specific viscosity grade.

    What does a bad head gasket sound like?

    If the head gasket fails in such a way it allows the compressed air/fuel to escape, the compression of that cylinder is reduced. This loss of compression results in a rough running engine and a notable reduction in engine power. This sort of failure typically is accompanied by a sound like an exhaust leak.

    How expensive is it to replace a head gasket?

    How Much Does it Cost to Replace a Head Gasket? According to a national average, it costs between $1,624 and $1,979 for a head gasket replacement. The associated labor costs are estimated between $909 and $1147 while the parts themselves vary in the range of $715 and $832.

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