But, it would leak down from a valve onto the plug.
The oil is not going to leak up from the crankcase overnight. Pull a spark plug and see if any oil is on it. Once you fire up the engine, that oil will quickly be burnt away causing a huge plume of smoke. During that time plenty of oil will leak down from the top of the head, through the valve seals, and coat the combustion chamber. If your valve seals are bad, it’ll always manifest itself the most after your Equinox has been sitting for a while. OK, you have blue exhaust smoke and you are fairly confident that it’s your valve seals or piston rings causing your Chevy Equinox to burn oil.
Chevrolet express 2500 burning oil how to#
Take a look at this great video from Ratchets and Wrenches on how to diagnose a bad PCV Valve. It sends it back to the intake system to be recycled. The PCV system takes the pressure from your crankcase and safely relieves it. Valve stem seals will let oil into the combustion chamber if they are: When they go bad, oil will be allowed into the combustion chamber and there will be blue smoke. The valves in your Equinox’s engine are responsible for letting air and fuel into the combustion chamber, closing when the spark plug fires, and opening again to let out the exhaust. When they fail your Equinox will begin to burn oil and get the telltale blue smoke issue. Your Equinox’s piston rings further close that gap and keep oil from leaving the crankcase and finding its way to the combustion chamber. The gap between you cylinder wall and the piston is measured in hundredths of an inch. Here are some of the more common causes that your Equinox would start to burn oil: You’ll usually smell the burnt oil before you’ll see blue smoke from the exhaust. While exhaust never smell pleasant, it’ll have a distinct burnt smell to it. Here’s more on diagnosing oil on your spark plugs.īurning oil has its own smell. When this happens your Equinox is likely to start running worse and misfiring, as the spark plug will no longer be able to achieve a clean spark. If oil is slipping past the valve seals, it can make its way onto the spark plugs. This could indicate that the oil is exiting through the seals, and not through the combustion chamber. If you normally park your Equinox in one place, look under it and see if there is any fluid under the engine. But, a low oil level does not necessarily indicate that you are burning oil.
This is very well the reason that you have come to this page. Blue smoke is proof positive that your Equinox is burning oil. Your exhaust will look more like a two stroke engine if it’s bad enough. It is then burned with the gasoline and tints the exhaust blue. Blue smoke indicates that oil has made its way to the combustion chamber. The most obvious and a telltale sign that your Equinox is burning oil is blue smoke. Here are the most common symptoms of burning oil: It’s when you are putting in a quart every 1 or 2 thousand miles that you are really consuming oil. As an engine ages, it is completely normal for it to start requiring a quart or two between oil changes. Most auto manufacturers are hesitant to tell you how much oil that they would expect their vehicles to burn. If your Chevy Equinox is burning oil it is typically caused by piston rings or valve guides.
The engine burning oil is one of the most common problems that a vehicle can encounter, particularly one with high mileage.
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