What Causes the Engine Abnormal Noise in Volkswagen Magotan?
2 Answers
Volkswagen Magotan engine abnormal noise is caused by speed factors, load factors, and temperature factors. The specific conditions are as follows: Speed factors: Excessive clearance between piston and cylinder wall; piston pin assembly too tight or connecting rod bearing assembly too tight; excessive clearance between tappet and its guide hole. Load factors: Piston knocking; loose connecting rod bearing; piston ring leakage; broken piston pin; connecting rod bearing cap fixing bolts excessively loose or connecting rod bearing alloy melted off; flywheel fixing bolts excessively loose. Temperature factors: Excessive clearance between piston and cylinder wall; piston affected by inaccurate depth and width of main bearing oil groove; poor lubrication due to low oil pressure or overheating causing pre-ignition; opposite directions of long and short axes of piston skirt ellipse; small piston ovality, too small clearance between piston and cylinder wall; piston deformation; piston ring clearances.
When I first drove the Volkswagen Magotan, the engine also made abnormal noises, specifically sounds like metal parts colliding or a squeaky friction noise from the belt. At the time, I looked it up and found common causes included belt system issues, such as an aging or loose timing belt, which can easily produce noise at idle. Another cause was carbon buildup—when carbon clogs the valves in Volkswagen’s TSI engine, it can create a ticking sound, especially noticeable during acceleration. Additionally, a failing water pump bearing or worn piston rings can lead to similar problems. My suggestion is to first listen to the noise to identify its location, such as the front belt or the middle valve area, and then check the engine oil, as low oil levels can increase wear. It’s best to get a professional diagnosis promptly to avoid safety risks. Regular maintenance, like cleaning the throttle body, can prevent many issues, as I’ve learned from experience.
