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What is the reason for oil leakage from the exhaust port of Volkswagen DSG?

2 Answers

BrookeLynn

07/23/25 7:49pm

Oil seal aging and deformation, related knowledge is as follows: Causes and precautions: Oil seal aging and deformation, oil seal spring detachment or incorrect installation direction of the oil seal can all cause the oil seal to lose its oil-blocking function. Aged and deformed oil seals should be replaced, and attention should be paid to the installation direction of the oil seal. The side of the oil seal with the spring ring should face the side with oil. Shaft neck eccentric wear or depression, which does not fit tightly with the oil seal, can cause oil leakage. The eccentrically worn or depressed shaft neck should be replaced or repaired. Once an automatic transmission malfunctions, the car owner should promptly send it for repair. If abnormal noise, slippage, impact, or oil leakage occurs, and the car owner continues to use the vehicle without paying attention, it may eventually lead to the vehicle not moving, or even the entire transmission being scrapped. Therefore, once a transmission malfunctions, it must be promptly sent to a professional transmission repair station for maintenance to avoid major losses due to minor issues.

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DeJason

08/10/25 5:54pm

I've seen quite a few cases of oil seepage from the vent hole of Volkswagen DSG transmissions. The common cause is overfilling of transmission fluid leading to a surge in internal pressure, where the fluid expands and gets squeezed out during driving scenarios like climbing hills or sudden acceleration. It could also be due to aging seals or blocked vent holes causing pressure buildup. I've advised car owners to first check the dipstick themselves to ensure the fluid level is within the marked range, and to remove some fluid if it's overfilled. Ignoring this issue can lead to fluid loss affecting lubrication, accelerating gear wear or even damaging the transmission, resulting in higher repair costs in the long run. Repair shops can perform oil pressure tests and clean the vent holes, which is safer than DIY. Don't neglect regular transmission maintenance in daily use, just make sure to use the specified type of fluid.

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