Common faults of n55 engine

N55 engine has poor heat dissipation, valve cover gasket leaks oil, and valve oil seal fails. The n55 engine is a product introduced by BMW to replace the previous n54 engine. N54 has dual turbocharging technology, and n55 has single turbine and dual scroll turbocharging technology. The n55 engine is equipped with BMW's proud dual vanos and valvet.

Common faults of n55 engine

N55 engine has poor heat dissipation, valve cover gasket leaks oil, and valve oil seal fails.

The n55 engine is a product introduced by BMW to replace the previous n54 engine. N54 has dual turbocharging technology, and n55 has single turbine and dual scroll turbocharging technology. The n55 engine is equipped with dual vanos and valvetronic electronic valve technologies that BMW is proud of.

Most vehicle engines control the air flow into the engine through the throttle, but BMW is different. The throttle of BMW engine is only partially closed at idle speed. After opening, the throttle valve is fully open. It is the engine valve that controls the intake of the engine. Pressing the accelerator pedal will directly act on the engine valve. This control method makes the BMW engine respond quickly, and the engine will respond to the driver's operation almost at the moment of stepping on the accelerator.

The working temperature of BMW's engine is generally between 105℃ and10℃, and sometimes even exceeds 120℃. This poses a great challenge to the rubber seals in BMW engines. After the n55 engine runs for tens of thousands of kilometers, the sealing performance of rubber parts will decrease, resulting in oil leakage. This is because rubber becomes hard and brittle under high temperature and high pressure for a long time, resulting in poor sealing performance. To solve this problem, just replace the rubber seal.

N55 engine is easy to burn oil, but this is caused by two reasons. First, the sealing performance of the valve oil seal decreases. The valve oil seal is also made of rubber. Working at high temperature and high pressure for a long time will make rubber lose its elasticity and its sealing performance become worse. At this time, the oil will flow to the engine combustion chamber along the valve guide rod, and the oil flowing to the combustion chamber will participate in the combustion process, which will cause the n55 engine to burn oil. To solve this problem, we only need to replace the aging valve oil seal.

The second reason for n55 burning engine oil is the design of cylinder surface. German automobile engines generally have high speed. In order to ensure that there is enough oil to lubricate the cylinder block at high speed, German cars will process grid lines on the surface of the cylinder block. These grid lines can store a part of engine oil and lubricate the cylinder block when the engine is running at high speed.

This grain design also exists on the cylindrical surface of n55, which causes the oil stored in the grain to evaporate when n55 runs at low speed. In fact, this design of German cars is not suitable for the road conditions in China. Two-thirds of expressway in Germany is unlimited, and the expressway network in Germany is developed. Germans often drive at a speed of more than 200 kilometers per hour in expressway, and the traffic jam situation is much better than that in China, so the engine will not always run at a low speed range, and the oil stored in the line will not be evaporated. On the domestic roads with serious traffic jams, the engine is in the low speed range most of the time, so the oil stored in the grain will be evaporated.

Is the n55 engine a twin turbine?

The N55 engine is a single turbocharged engine and an optimized version of the n54 engine. The reliability and durability of n55 engine are better than that of n54 engine, and the fuel economy is better than that of n54 engine.

Both n55 and n54 engines are BMW's 3.0-liter inline six-cylinder turbocharged engines with good performance.

The running smoothness of the inline six-cylinder engine is very good, and this engine can offset the vibration during operation.

The N54 engine is the first time that BMW has made a 3.0-liter six-cylinder turbocharged engine, so BMW has used dual turbocharging technology.

Later, BMW developed the supercharging technology of single turbine and double scroll tubes, so later, BMW turbocharged engine also adopted this technology.

Single scroll and double scroll turbocharging can reduce turbine lag and exhaust interference between cylinders, and improve the response speed of the turbine.

The response speed of turbine is improved, and the dynamic response of engine is also improved.

BMW cars equipped with turbocharged engines will hardly feel the phenomenon of turbo lag.

If you are interested in the n55 engine, you can try BMW equipped with this engine. Many BMW models use n55 engines, such as BMW 335i, BMW 535i, BMW m2 and so on.

Common faults of N55 engine @20 19