Problems and causes of the BMW N47 engine [ How to Fix ]
The BMW N47 is a 4-cylinder in-line engine, successor to the BMW M47. You can have the 1.6-litre or 2.0-litre variant rated at 94 hp and 204 hp respectively. Since this is a modern engine, it meets strict emission standards based on DPF and EGR technology. This is the reason why the engine has some problems. Below is a description of some minor and major problems you may have with this engine.
Premature timing chain failure
In this engine, the timing chain suffers from excessive wear, causing premature failure. Also, the chain can collapse while driving the car, which can cause serious damage to the car. In this case, you may need to replace the motor.
A common sign of a bad timing chain is a rattling noise from the rear of the engine. You can find this chain between the transmission and the engine. So changing the chain is the only solution, which requires taking out the entire motor or disconnecting the transmission.
EGR sensor malfunction
The purpose of the EGR system is to help the vehicle meet strict emissions standards. Basically, this system circulates part of the exhaust gases towards the engine intake in order to reduce the amount of nitrogen oxide.
Generally, this system malfunctions when the sensor accumulates a lot of questionable information. As a result, an increasing amount of exhaust air enters the intake. Therefore, the hot exhaust gases can melt the plastic collector. As a result, you experience a considerable reduction in boost pressure.
If the EGR valve is fully open, it can cause soot buildup on various engine components such as the glow plugs, intake manifold, and fuel injectors. Therefore, the airflow is reduced due to the restrictions. Therefore, your car takes a while to start in winter.
DPF not working
The function of the DPF is to filter diesel or soot particles. Generally, it works at high temperatures. Also, during short trips, this component does not come out enough to remove exhaust gases and soot. As a result, it causes soot buildup in various parts such as the engine glow plugs, EGR sensor, DPF sensor, and turbo.
Power steering pump failure
On these engines, power steering is not as reliable. If you find oil spills around the steering oil or reservoir cap, the power steering pump is likely at fault.
Oil leak from crankcase breather hose in high temperatures
Generally, the crankcase breather hose tends to leak at high temperatures. A common indicator of this problem is oil leaking from the end of the hose. However, you can solve this problem by installing a stiffer plastic hose instead of a rubber one.
conclusion
In short, if you are a BMW N47 owner and are facing these issues, we suggest you take your vehicle to a mechanic immediately and have these issues resolved. By reading this article, you can get a better idea of these issues. This will help you take better care of your vehicle.