What Causes Rusting in Volkswagen Dual-Clutch Flywheels?
1 Answers
Volkswagen dual-clutch flywheel rusting is primarily a design issue with the major assembly. It manifests as brief power interruptions accompanied by significant abnormal noises during driving. This problem is closely related to driving conditions—the more severe and frequent the water exposure, the more pronounced and likely this phenomenon becomes. Flywheel Overview: The flywheel is part of the engine assembly. It is a steel disc that transmits and balances engine power to the transmission (power flows through the flywheel → clutch/hydraulic torque converter → gearbox). The flywheel increases the engine's weight, thereby enhancing its inertia to accumulate more energy, raise cylinder temperatures, and ensure smooth engine operation. Causes of Flywheel Rusting: The flywheel paired with the DQ200 transmission model features a non-enclosed design with ventilation holes located underneath. These holes are positioned only about 15 cm above ground level, whereas industry standards typically maintain ventilation holes at 50–70 cm height, usually placed on the upper part of the transmission housing with rubber vent tubes to improve water-wading capability. The 15 cm ground clearance means even shallow puddles can easily allow water ingress through the vents, leading to flywheel rusting.
