One of the telltale signs that a car has a problem is colored exhaust or smoke coming from the tailpipe. If there is smoke coming from the tailpipe, its color can often provide clues to help identify the problem.
Of course, we use high-tech diagnostic tools to troubleshoot all of your car problems, but any information you can provide (like the color of exhaust coming from the tailpipe) can help us identify the problem and get you back on the road faster. Here’s what some exhaust colors can indicate:
White: Your engine may put out white smoke if the fuel mixture has been compromised by water or antifreeze. It’s often caused by a faulty or failed rubber gasket designed to maintain a tight seal to keep antifreeze out. Sometimes a leak can develop if your car overheats and damages a head gasket.
Blue: All it takes to spew blue smoke from your exhaust is a tiny drop of oil leaking on to the engine’s cylinder. Only a mixture of gasoline and oxygen are meant to power your engine. If a gasket or seal has failed, there’s a chance that a small amount of oil may reach the engine’s cylinder and could potentially damage spark plugs. In addition to making any necessary repairs to prevent this, some older cars may also benefit from using thicker engine oil or an additive that can minimize the potential for an oil leak.
Black smoke: If too much fuel gets into the engine’s cylinder and you try to start your car, you may see black smoke coming from your exhaust. In many cases, a poorly-working carburetor is to blame. Black smoke may also be linked to a failing fuel pump, a fuel injector that needs to be cleaned or replaced, or a computer-related problem connected to your engine.
If you see odd colored smoke coming from your tailpipe, getting it checked out before other problems develop is the best idea.