Burning Oil Smell Through Vents – Causes and Fix

It could be a sign that your engine is having problems.

It is common for oil to get sprayed on hot engine parts. This causes a burning smell. The oil is removed. oil evaporates over time. If you’re still experiencing the burning oil smell, it could be another reason. 

Let’s take a look at the reasons that vents can emit an oily odor. 

Causes of burning oil smell through vents 

Oil leaking into your engine can cause a burning oil smell. There are many reasons oil may be leaking. You could have a clogged filter, damaged oil pan or a faulty gasket. You’ll need them fixed, which will cost you anywhere from $100 to $2,000. 

 Let’s examine other reasons that you might smell burning oil from your vents. 

Improper oil change 

Another reason your exhausts smell like burning oil is that they are not properly lubricated. You can let oil seep onto other parts of the engine if your engine oil is not changed correctly or in a hurry. If you don’t use the right oil funnel when pouring your oil, this can also happen. 

Any extra oil or overfilling Your engine will heat up and cause the components to burn. The vents can then produce a burning smell inside your vehicle. Over time, oil on engine components can evaporate. If you continue to smell the burning after a few weeks, it could mean that there are other problems. 

Leakage of exhaust 

The exhaust pipes and manifold collect exhaust gasses from the cylinder heads. If the exhaust manifold has a hole, gases can leak into the car cabin. You may smell burning oil. 

It is very similar to checking your bicycle for a puncture. Spray some water on the exhaust manifold, and then start the engine. After the engine has warmed up, bubbles will form around the hole caused by smoke trying escape. As smoke tries escape, you may hear a whistling sound. 

Faulty PCV Valve 

The PCV valve controls crankcase ventilation and helps to reduce engine emissions. The valve cover gasket can become clogged with pressure if the PCV device fails to function properly. The pressure builds up on the valve cover gasket, which causes the bolts of the gasket to become loosening and allows compressed oil to leak into your motor. This oil will cause a burning smell in your engine’s exhausts when it is heated. This burning oil may also be used to make other products. smell like gas.

To check for leaks, make sure to inspect the bolts holding the cover gasket on the valve. If the bolts on the valve cover gasket are loose, it is likely that the PCV valve has been under extra strain. You can inspect the PCV Valve by removing it from the hose. It is likely to be operating correctly if you hear a metallic tone and see a vacuum at its tip. 

Clogged catalytic converter 

It is unlikely that the catalytic convert can emit an oily smell through the vent.  Catalytic converters are responsible for reducing exhaust gas emissions. Catalytic converters may become clogged or damaged over time due to overheating or dust. This can cause the combustion chamber to stop releasing gasses.  

You may notice a stronger sulfur odor from the exhaust. This odor could pass through your cabin’s vents and into your cabin. Your mechanic can repair or replace the catalytic converter because it is illegal to remove it. 

How to Get Rid of Burning Oil Smell 

You must first determine the source of the burning oil smell in order to remove it. You should take the engine apart if there is damage. 

There are several options available if your engine parts have not suffered any physical damage. 

  • Make sure to clean any oil that may be on the engine. 
  • Drain excess oil from the oil tank if it is full. 

How to avoid burning oil smell 

Sometimes oil burns but does not smell at first. In such cases, you should look out for these signs: 

  • The brakes don’t work correctly 
  • It can make it difficult to shift gears. 

Here’s how to avoid oil-burning smell 

  1. Overfilling the oil tank can cause oil to leak over engine parts. The oil can start to smell burnt as it heats up. You can verify the oil’s level with a dipstick. 
  2. Every once in a while, have your engine components checked. For oil leakage, inspect the gaskets and PCV valves. Make sure that the exhaust manifolds and pipes are in good condition. 
  3. Use the funnel to stop oil from getting all over your engine components when you are changing your oil. 

FAQ’s on Burning Oil Smell Through Car Vents

[sp_easyaccordion id=”1283″]


A small amount of oil leaking from engine components is nothing to be concerned about. Oil may start to smell as it evaporates. After driving for a few miles, this smell should be gone.

This could be a problem if your valve cover gasket, or exhaust manifold are damaged. Have your engine inspected by professionals if you notice more burning engine oil. 

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *