Is Oil Leakage from the Rear Axle Vent Hole a Serious Problem?
1 Answers
Oil leakage from the rear axle vent hole is indeed a serious problem. Over 90% of oil leakage issues occur because the rubber sealing ring loses a significant amount of plasticizers and softeners due to prolonged exposure to alternating hot and cold temperatures, leading to corrosion, aging, and hardening. Initially, it may manifest as oil seepage, gradually progressing to dripping oil. Over time, the sealing ring may crack. In the past, such leaks were addressed by dismantling the engine and replacing the oil seal. However, with technological advancements, oil leakage can now be resolved without disassembly. Common causes of rear axle oil leakage in vehicles: Improper installation of the main drive gear oil seal; porous or sand-included bearing seat castings. In such cases, simply replacing the oil seal won't suffice—the bearing seat must be replaced; overfilling of gear oil, damaging the oil seal edge during half-shaft assembly; misaligned rear axle wheel hub flange connection holes, causing misalignment between the half-shaft and wheel hub, leading to repeated damage to the half-shaft oil seal; damaged inner oil seal of the rear wheel hub, causing lubricant to be thrown out from the inner wheel disc. Reasons for oil leakage under the vehicle: Poor quality, material, or workmanship of the product (parts); flawed structural design; improper high-speed assembly, unclean mating surfaces, damaged, displaced, or improperly installed gaskets; uneven tightening torque of nuts, stripped threads, or loose fasteners leading to operational failure; excessive wear, aging, deterioration, or deformation of sealing materials after prolonged use; overfilling of lubricant, excessively high oil level, or use of incorrect oil type.
