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Oil Coming Out of Exhaust And 5 Ways to Troubleshoot

The jobs of the exhaust pipe are to transfer the combustion chamber gases to the outside and muffle the engine sound. It is supposed to discharge of fume but it could be a sign of trouble if anything else comes out of it. Oil leak in exhaust pipe is a problem that needs your immediate attention. Remember that it almost always warrants professional service in case of any incident of oil coming out of exhaust.

How to Troubleshoot the Problem of Oil Coming Out of Exhaust

Don’t panic when you found oil coming out of exhaustThere are several ways to diagnose this problem and reach for a solution. And in this article, we will even give you 5 solutions! Let’s discuss some common ways to pinpoint the troubling component.

Examine The End of Exhaust Pipe

Oil Leaking From Exhaust
Black soot can form an oil-like liquid.

Sometimes, the leaked oil coming from exhaust might not be oil at all! The exhaust pipe can usually the main source of this problem. If you are a lazy car owner and haven’t cleaned it for years, beside from our maintenance tips, we suggest checking the outside of the pipe. Since it usually collects soot and the layer could be pretty thick. Mixed with that soot, the condensation coming out of the car exhaust could form an oil-like liquid.

But worry not, driver can fix this issue very easy. All you need to do is wearing a glove and running a finger on the inside of the pipe to see if there’s soot.

Congested PVC Valve

oil coming out of exhaust
Driver should also notice the PVC Valve

As we all know, internal engine gases travel to the combustion chambers through the PVC valve. When it’s clogged, the growing amount of gas volume creates pressure on the engine. This will forces the oil to pass several seals and into the exhaust pipe.

The warning signs for this kind of oil coming out of exhaust problem are bluish smoke and oil-smeared spark plugs. In order to fix this, car owners can replace the valve. This is an easy solution to address the problem.

Ruptured Head Gaskets

oil coming out of exhaust
Head gasket can also take responsibility for the oil coming out of exhaust

Being a part of the exhaust system, these act as a seal between the engine heads and the block. A blown gasket lets one or more fluids to get past the seals and mixed into the exhaust stream. So if you find oil coming out of exhaust, this could be a place to take a look.

The symptoms are the overheated engine, reduced engine performance, and excessive fuel burning. You have to change the defective gasket(s) to bring the system back to normal.

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Worn Valve Guides

oil coming out of exhaust
The oil coming out of exhaust could be from exhausted gas

Valve guides control the gas flows into and out of the engine. They have seals around their shafts that may wear out with time. In the case, the engine oil leaks and runs into the exhaust gases. You will detect bluish smoke coming out of the tailpipe if this problem occurs.

Watch Out The Smoke Colors

oil coming out of exhaust
Oil coming out of exhaust can also be noticed by the color of smoke

The colors of the tailpipe smoke are good signs to detect the type of oil coming out of exhaust problem.

Black smoke refers to unburnt fuel, which means that the engine fails to burn one or two combustion catalyst. Gray or bluish smoke means the leaking of engine oil into the internal combustion chamber.

On the other hand, white smoke requires a thorough examination of the engine. The problem could lie in the combustion chamber or because of faulty piston oil rings.