Your car smokes from the exhaust manifold area and tailpipe when is cold or been sitting up for a hour?

White smoke from the exhaust manifold area and tailpipe when the engine is cold or has been sitting for a while is usually caused by condensation in the exhaust system. This is normal and should not be a cause for concern. As the engine warms up, the condensation will evaporate and the smoke will disappear.

However, if the smoke is blue or black, it could be a sign of a more serious problem. Blue smoke indicates that oil is burning in the engine, while black smoke indicates that the engine is running rich (too much fuel is being used). If you see blue or black smoke from your exhaust, you should have your car inspected by a mechanic as soon as possible.

Here are some possible causes of blue or black smoke from the exhaust:

* Oil leaks: Oil can leak into the exhaust system from a variety of places, including the valve cover gasket, oil pan gasket, and piston rings.

* Worn piston rings: Piston rings help to seal the combustion chamber and prevent oil from getting into the exhaust system. When piston rings are worn, they can allow oil to leak into the exhaust.

* Faulty PCV valve: The PCV valve helps to control the flow of air into and out of the engine. When the PCV valve is faulty, it can cause the engine to run rich, which can lead to black smoke from the exhaust.

If you are experiencing blue or black smoke from your exhaust, it is important to have your car inspected by a mechanic as soon as possible. Ignoring this problem could lead to serious engine damage.