Why does my car smoke when I start it up?
Usually it’s due to worn piston rings or wear on the cylinders themselves. The valves sit right on top of the cylinders and when the seals are worn out, oil leaks into the combustion chambers and burns together with the fuel. Sometimes after a car has been parked for a while, blue smoke is noticeable on start up.
Can low oil cause car smoke?
Generally, blue smoke is caused by oil seeping into the engine and being burned along with the fuel. Your engine will be low on oil, as well. Note that if the exhaust is grayish, it is more likely to be caused by an incorrect fuel-to-air ratio, as your engine is burning “rich” – too much fuel is being combusted.
Considering that the vent holes are blocked by buildup, the oil does not drain back into the cylinder head. So when you first start the engine, a large amount of the accumulated oil is sucked into the intake system through the vacuum hose. This of course, results in a small cloud of smoke.
Why do I get white smoke when I start my Silverado?
When starting the vehicle after it has sat for a while you’ll get some bluish white smoke from the exhaust. You’re burning oil, but relax. It’s most likely oil that has seeped into the vacuum hose through the PCV valve.
Can a 2006 Silverado 5.3L smoking on startup?
2006 Silverado 5.3L Smoking on Startup Solved! If you own a GM truck or other vehicle with a 5.3L smoking on startup, you should read this. When starting the vehicle after it has sat for a while you’ll get some bluish white smoke from the exhaust. You’re burning oil, but relax.
Why does my car make a rumbling noise when I drive?
What’s more, there’s another sense you might use to detect an exhaust leak: your sense of hearing. Since the exhaust sound is muffled by the muffler, an exhaust leak before the muffler will cause your car to make a loud, rattling, rumbling sound as you drive.