Why would a car blow blue smoke then clear after about 20 miles?

If your car is blowing blue smoke, it's a clear sign that the engine is burning oil. What happens is that the valve guide seals or piston rings are worn out, and oil is leaking past from where it should be lubricating the moving parts, to the combustion chamber where it's being burned up with the fuel.

1. Why is my car blowing blue smoke when I accelerate?
2. Can a blown head gasket cause blue smoke?
3. Can low oil cause blue smoke?
4. What does Blue smoke indicate?
5. Can a bad EGR valve cause blue smoke?
6. Can a bad O2 sensor cause blue smoke?
7. Can PCV valve cause blue smoke?
8. What color smoke is a blown head gasket?
9. How is blue smoke diagnosed?
10. Can you drive a car with blue smoke?
11. Can a bad injector cause blue smoke?
12. Can a bad fuel filter cause blue smoke?
13. Can an oil change Fix Blue smoke?

Why is my car blowing blue smoke when I accelerate?

Blue/gray exhaust smoke means there's likely an oil leak and your engine is burning oil. ... The leak could be caused by several issues like leaking valve seals, damaged piston rings, or worn cylinder walls. Pro-Tip: Blue smoke during acceleration means your vehicle's piston rings may be damaged.

Can a blown head gasket cause blue smoke?

The most common sign of a blown head gasket is exhaust smoke. White smoke indicates that your car is burning coolant that is leaking into the cylinders. A similar problem is indicated by blue exhaust smoke, though this is a sign of oil leaking from the gasket.

Can low oil cause blue smoke?

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak.

What does Blue smoke indicate?

Blue smoke can often look like grey smoke at first. But if you notice a distinctive bluish tint, it may signal that the engine is burning lots of oil. This could be due to worn engine components like piston rings, valve seals, or PCV (Positive Crankcase Ventilation) valves.

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 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 PCV valve cause blue smoke?

Stuck PCV Valve

To put it simply, a PCV valve uses the engine vacuum to pull blow-by (combustion gases entering the crankcase) gases out of the crankcase. ... And the vehicle would emit blue smoke from the exhaust upon combustion of this mixture. A bad PCV valve could cause major engine trouble if ignored.

What color smoke is a blown head gasket?

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.

How is blue smoke diagnosed?

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. What is happening is that the engine seals are not effectively sealing the oil from getting into the cylinders.

Can you drive a car with blue smoke?

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. It's either a problem to do with the oil, or internal engine components.

Can a bad injector cause blue smoke?

This can be caused by worn/leaking injectors or restrictions in the air intake system. Blue smoke is normally the result of engine oil entering & burning inside the combustion chamber. ... But what we see more often than not are issues related to worn injectors.

Can a bad fuel filter cause blue smoke?

A bad fuel filter would not cause any kind of smoke whatsoever.

Can an oil change Fix Blue smoke?

If this blue smoke has only started appearing after an oil change, then you may have just put too much oil in. This will cause the oil to froth up and decrease its efficiency in dealing with lubrication and heat. Just drain out the excess oil and start over.