What Causes Abnormal Noise in BMW Engines?
2 Answers
Abnormal noise in BMW engines may be caused by severe carbon deposits in the engine or ignition system issues. Here are detailed explanations and solutions: Caused by severe engine carbon deposits: The most common cause of car shaking is excessive dirt in the throttle or too much carbon buildup in the fuel injectors. Solution: Clean the fuel system and check if the idle speed motor has carbon deposits that need cleaning. Ignition system problems: Check the working condition of the spark plugs, high-tension wires, and ignition coils. Poor performance of the ignition system or improper spark plug firing can also lead to such faults. Solution: Check if the spark plugs have excessive carbon deposits and replace them if necessary.
As someone who frequently handles BMW repairs, I've found that the causes of engine abnormal noises are diverse. The most common issue is a loose or worn timing chain, especially the rattling sound during cold starts, as BMW's chain design is prone to aging. Additionally, unbalanced turbocharger blades can cause a whining noise at high speeds, while damaged water pump or generator bearings produce a squeaky friction sound, likely due to insufficient lubrication. Valve train noises like ticking are usually caused by hydraulic lifters or camshaft problems. There's also the squealing from a faulty belt tensioner. My advice is not to panic when hearing any unusual sounds. Try to note the nature and location of the noise, then drive to a professional shop for computer diagnostics as soon as possible to prevent minor issues from developing into major engine repairs. Regular maintenance like oil changes and timing system inspections can effectively prevent these problems.
