Having an automobile is vital, we most of the time need it to get to our job and for almost all of our daily trips. This vital part of our annual budget recurrently triggers us complications, being aware about oil leaking on your car is one of them… In actual fact, an oil leak is rarely benign and can quickly lead to the breakage of your engine if you don’t discern it. If you are aware about oil leaking on your BMW 4 Series, you have come to the right page, we will first help you to find the source of the oil leak and, secondly, we will help you to remedy it, if it is possible.
Identifying the origin of the oil leaking on your BMW 4 Series
If you observe fluid leaking from under your BMW 4 Series, the first move to make is to examine all of your levels (power steering, engine oil, brake fluid, coolant) to see if any of them can quickly be identified as the source of the leak. To limit the risks, it is definitely crucial to examine your levels every 2 weeks to avoid any risk of engine breakage.
In our circumstance we will only be interested in circumstance you notice oil leaking from your BMW 4 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 annoying smell.
It’s not constantly easy to find the source of the oil that leaks on a BMW 4 Series because of the accessibility of the engine block, nevertheless here are the simple steps to follow to find the origin of the oil:
- Discover the point where the oil falls, the place from which it leaks onto the ground…
- Track down the route of the dripping oil to its source, if the blot is too large, don’t think twice to clean the engine block and drive to be capable of locate it more easily.
- To guide you, here is a list of the auto parts that in most cases provoke 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, repair the part that caused the oil to leak on your BMW 4 Series.
Now that you’ve found the source of the oil leaking, it’s time to get down to business. Naturally, for a while, you’ll be able to add more oil to top up the level, according to its seriousness, but remember that this is not a durable remedy and that the leak could get worse at any moment. We are gonna reveal you the repairs that we think you can carry out all alone with some knowledge, tools and according to the accessibility that you are going to have on your engine. In any case, you should know that after repairing an oil leak on a BMW 4 Series, you will have to swap your engine or gearbox oil.
Oil leakage from the drain plug and its seal on BMW 4 Series
In this situation, the solution is quite easy, you just have to lift your BMW 4 Series, whenever possible totally horizontal, remove your drain plug, drain your engine oil, swap your drain gasket, tighten the plug to the perfect torque and examine the hot engine to make sure the leak has been fixed.
Oil leaking over from the oil filter of my BMW 4 Series
In the event that your oil leak comes from your oil filter, you will just need to change it. To do this, take a filter wrench, remove the old filter, being certain that the gasket does not stick to the engine, set the new filter and tighten it moderately. Same test, hot check if oil is leaking from your BMW 4 Series.
Oil leaking from the pressure switch of my BMW 4 Series
To finish , if it is your pressure switch that is the trigger of your leak on your BMW 4 Series, you can, according to its accessibility, reach it and swap it very easily. To make this happen, place a drain tray under the part, disconnect the electrical wire, remove the part, quickly reposition the replacement pressure switch, clean the assembly and do a hot check to confirm that you no longer have any oil leaking from your BMW 4 Series.
For any other type of leak, we recommend you to go to your auto mechanic because the repair will involve too much expertise and tools to be executed serenely alone.
If you wish more guides on the BMW 4 Series, go to our BMW 4 Series category.
