Blog, BMW Case Studies, Car Repair and Servicing, Case Studies BMW Case Study 79: 520i Engine Oil Sump leakage Posted on June 30, 2022June 30, 2022 by admin 30 Jun Is it normal to keep topping up Engine Oil? Mr. Ong BMW 520i is having the needs to keep topping up engine oil as per the indication and visited Revol Carz Garage for assistance. There is a bad leakage from the Oil Sump. The Oil Sump sits at the bottom of your BMW’s engine and holds the Engine Oil when the Engine isn’t running. When the Oil Sump gasket fails, oil drips under the vehicle (as you see in the picture). Over time the plastic Oil Sump will shink in size due to heat (left) is changing guard with the brand-new set. The joy we feel from in restoring the enviable BMW is expressed in the refreshing finish and car is returned to Mr. Ong with no more engine oil topping up required. admin Grateful with your continuous patronage! Bringing back the beauty of this Mercedes Benz!