Having an automobile is essential, we often need it to get to our job and for a majority of our daily trips. This crucial part of our annual budget occasionally triggers us complications, being aware about oil leaking on your car is one of them… In reality, an oil leak is almost never benign and can quickly lead to the breakage of your engine if you don’t find it. If you are aware about oil leaking on your BMW 3 Series, you have come to the right web site, we will first support you to find the origin of the oil leak and, secondly, we will help you to remedy it, whenever possible.


Identifying the origin of the oil leaking on your BMW 3 Series

If you see fluid leaking from under your BMW 3 Series, the first move to make is to examine all of your levels (power steering, engine oil, brake fluid, coolant) to discover if any of them can fairly quickly be identified as the source of the leak. To limit the risks, it is certainly crucial to examine your levels every 2 weeks to prevent any risk of engine breakage.
In our case we will only be focused on case you notice oil leaking from your BMW 3 Series, as far as engine oil is concerned, the liquid will be quite viscous and in shades of brown to black and if it is gearbox oil, it will be rather in amber tones and will have a strong uneasy smell.
It’s not actually easy to find the origin of the oil that leaks on a BMW 3 Series because of the accessibility of the engine block, however here are the steps to adhere to to find the source of the oil:

  • Uncover the point where the oil falls, the area from which it spills onto the ground…
  • Track down the route of the dripping oil to its origin, if the blot is too big, don’t hesitate to clean the engine block and drive to have the ability to locate it with less effort.
  • To assist you, here is a list of the parts that most of the time bring about oil to leak from a car: the drain plug and its seal; one of your crankcase gaskets; the oil pressure switch; the oil filter; the transmission drain plug; the transmission sealing rings.

If possible, fix the part that caused the oil to leak on your BMW 3 Series.

Now that you’ve found the origin of the oil leaking, it’s time to get down to business. Obviously, for a while, you’ll be able to add more oil to top up the level, according to its severity, but you should know that this is not a durable treatment and that the leak could get worse at any moment. We are gonna present you the repairs that we think you can perform on your own with some expertise, tools and depending to the accessibility that you are going to have on your engine. No matter the reason, you should know that after repairing an oil leak on a BMW 3 Series, you will have to change your engine or gearbox oil.

Oil leakage from the drain plug and its seal on BMW 3 Series

In this situation, the process is quite easy, you just have to lift your BMW 3 Series, if it is possible perfectly horizontal, remove your drain plug, drain your engine oil, change your drain gasket, tighten the plug to the appropriate torque and examine the hot engine to make sure the leak has been fixed.

Oil leaking over from the oil filter of my BMW 3 Series

In the case that your oil leak comes from your oil filter, you will only need to change it. To achieve this, take a filter wrench, remove the old filter, making sure that the gasket does not stick to the engine, place the new filter and tighten it moderately. Same evaluation, hot check if oil is leaking from your BMW 3 Series.

Oil leaking from the pressure switch of my BMW 3 Series

Finally, if it is your pressure switch that is the reason of your leak on your BMW 3 Series, you can, based on its ease of access, reach it and change it quickly. To achieve this, set a drain tray under the part, disconnect the electrical wire, remove the part, quickly reposition the replacement pressure switch, clean the whole thing and do a hot check to make sure that you no longer have any oil leaking from your BMW 3 Series.

For any other type of leak, we recommend you to go to your auto mechanic because the repair necessitates too much knowledge and tools to be done serenely alone.

If you have any additional questions about the BMW 3 Series, do not hesitate to consult our BMW 3 Series category.