As your vehicle’s waste disposal element, the exhaust pipe sends fumes away from the engine, serving a vital function. This job means there will be a certain amount of smoke coming out of the tail pipe, but if you continually see white smoke, it could mean part of the engine is struggling. Here are the most common reasons you might see white smoke coming out of your car’s exhaust pipe:
Leaking Valve Seal or Piston Ring
Any leaky component is bad news, and the cooling system has piston rings and valve seals that can loosen or become worn, causing oil to leak into the chamber. If this happens, the excess fuel will burn, escaping out the exhaust pipe in the form of bluish or white smoke. To properly diagnose and repair the issue, take your vehicle to a technician as soon as possible, as neglecting a leak can cause further damage down the road.
Internal Coolant Leak
Again with the cooling system, your vehicle can develop an internal leak. As such, leaking coolant will exit from the exhaust pipe as white smoke and will also create a sweet odor. If these two symptoms coincide, have the car serviced immediately.
Malfunctioning Fuel Injector
This part is responsible for placing proper amounts of fuel into the engine, so if it gets stuck or develops an O-ring issue, too much fuel can get into the combustion chamber and exit (unburned) as gray or white smoke from the exhaust manifold. In good news, having the injectors replaced (they aren’t expensive) will handily remedy the white smoke, getting your engine’s fuel regulated normally.
The only innocent symptom on this list, white smoke can be a product of cold outside air generating steam and condensation. If you live in warmer climates, this issue is moot, but in colder areas, you might see white smoke quite often. It should right itself as the car warms up, but if the issue continues, consider having your car professionally evaluated.
Faulty Injector Pump
Only diesel engines have this component, but if it loses its ability to time the fuel properly, your engine will run rich, creating excess fuel that runs unburned out of the exhaust pipe.
As you can see, most of these problems occur when extra coolant or fuel leaks into the engine. To stay on top of small issues before they become major hassles, make regular maintenance a priority, as keeping experienced eyes on your vehicle is the easiest way to drive safely.
For all your vehicle’s maintenance and repair needs, call MMW Repair in Marietta at 770-214-4688 and schedule an appointment today!