What are the causes of excessive friction in the BMW 5 Series steering gear?
3 Answers
BMW 5 Series steering gear excessive friction causes: Low-quality lubricating oil leads to poor lubrication effect. Mechanical steering system: The mechanical steering system uses the driver's physical strength as the steering energy source, consisting of steering control mechanism, steering gear and steering transmission mechanism. The series of components from steering wheel to steering transmission shaft belong to the steering control mechanism, while the series of parts from steering knuckle arm to steering trapezoid belong to the steering transmission mechanism. Power steering system: The power steering system uses both driver's physical strength and engine power as steering energy sources. Normally, the driver only provides a small portion of the required steering energy, while most energy is provided by the engine through power steering devices. When the power steering device fails, the driver should be able to independently undertake the vehicle steering task. Therefore, the power steering system is formed by adding a set of power steering devices to the mechanical steering system.
I've been driving my BMW 5 Series for a while now, and suddenly the steering has become extremely heavy, as if the steering wheel is stuck, making it hard to turn. I think the main reason for the excessive friction in the steering system is a problem with the lubrication system, such as old or insufficient lubricant, causing dry friction between the rack and pinion; dust and dirt buildup inside, especially after driving on muddy roads in the rain, which can easily clog it; or wear and deformation of the internal bushings in the steering gear, reducing clearance and increasing resistance. BMWs are designed with precision, and neglecting regular maintenance can quickly lead to lubrication failure. Driving mostly short distances can also prevent the lubricant from spreading adequately, causing friction. High friction not only makes driving tiring but also accelerates component wear, risking steering failure. It's best to visit a repair shop soon for a professional cleaning and lubrication. Checking the lubricant level every six months can help prevent this issue.
As an automotive mechanical enthusiast, I analyzed the high friction issue in BMW 5 Series steering systems. Common causes include wear on the rack or pinion gears, where surface irregularities increase frictional resistance; insufficient or degraded lubricant leading to impaired movement; faults in the electric power steering system, such as control module failures, which reduce assistance and artificially heighten resistance perception; and external factors like thermal expansion of components in high temperatures, reducing clearances. BMW's sensitive systems mean that dust intrusion or damaged dust boots introducing contaminants can exacerbate friction. Relevant considerations include how high friction impacts steering precision, increases power consumption, and causes unnecessary tire wear. It's advisable to use diagnostic tools to check power steering parameters and opt for OEM-specified lubricants to maintain system longevity.
