Where is the oil extraction port on the BMW N52 engine?
2 Answers
There is no oil extraction port because the BMW fuel filler neck has a filter screen, making it impossible to extract oil. However, you can start the engine to extract oil from the fuel outlet pipe. Here are some precautions for refueling: Do not wait until the fuel light comes on to refuel: The fuel pump is located inside the fuel tank and operates at high temperatures during continuous use. Being submerged in fuel helps cool it effectively. When the fuel light comes on, it indicates that the fuel level is below the pump. Waiting until the light comes on to refuel each time will shorten the fuel pump's lifespan. Having too little fuel or running out of fuel may also cause the pump to burn out. Do not fill the fuel tank completely: For regular city driving, there is no need to fill the fuel tank completely. A full tank increases the engine's load and leads to higher fuel consumption.
I've driven BMWs for over a decade and am particularly familiar with the N52 engine models. Its oil extraction port is located at the dipstick hole position, in the top area of the engine near the cylinder head. When you remove the dipstick cap, you'll see a round hole where you can directly insert the vacuum oil extraction tube. I remember during my first time doing this, the location was quite obvious, but you must ensure the engine has cooled down before operation to avoid hot oil splashing and causing burns. Why isn't there a dedicated extraction port? Probably to save on design costs and effort, but overall it's quite practical. For routine maintenance, I directly extract oil from here, eliminating the hassle of removing the oil pan. I recommend regular oil changes and checking every few thousand kilometers to protect engine longevity, as fresh oil is crucial. If the tube is inserted too deep, it might get stuck, so operate gently without rushing. Overall, the position is fixed and easy to locate—just pay attention to safety when doing your own oil changes.
