Why does my car leak oil from the exhaust?

There are hundreds of different problems that can happen to your car, some more serious than others, but they all have their level of importance. Taking care of and keeping your car up to date with all its services helps to extend the useful life of the vehicle.

However, time and use make many parts wear out, they don’t work the same and the car starts to do things that it’s not normal for it to do, like oil leaking from the exhaust.

Oil leak from exhaust pipe it can lead to deeper problems and it is best to take your car to a professional for repair as soon as possible.

Why is my car leaking oil from the exhaust?

The reasons why the car leaks oil from the exhaust there can be severalbut for whatever reason you should take your car in for repair immediately, as it can be a serious problem and if it is not repaired it can turn into something more serious.

Here we tell you some of the reasons why your car leaks oil through the exhaust.

1.- Head gasket

The head gasket is responsible for sealing the joint between the engine block and the head. Thanks to this, leaks of compression gases, antifreeze or oils from the lubrication channels are avoided.

Being part of the intake and exhaust systems, sealing the fluid ducts, these can escape if the gasket is no longer in optimal conditions.

2.- PCV valve

Bluish smoke coming from the spark plugs and reduced fuel consumption are some of the early warning signs to be aware of. Why? Because when the PVC valve gets clogged, it can lead to rough idling or worse, stalling.

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If the engine becomes pressurized and forces the oil to break the seals and move on to the exhaustthe valve will need to be replaced.

3.- Valve guides

These guides help control the flow of gases and are lubricated with engine oil. They have gaskets around their shafts, but if they wear out They allow the lubricant to pass into the gas stream and end up in the exhaust pipe.

4.- Pistons

The pistons are sealed by the rings, which are lubricated by the oil. But if these wear out, they will allow lubricant and fuel to seep into the exhaust system. When this happens, the vehicle loses power and emits bluish smoke.

Another variant related to the piston is when it ends up pierced as a result of the enormous pressures it must withstand in each cycle. In this case, the aforementioned symptoms are joined by an increase in engine noise.


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