Small pan oil leak.

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Larry, it sounds like your R350 is being a bit stubborn with that oil pan leak. If the pan has been resealed and even replaced, yet the leak persists in the same spot, there might be more to this mystery. A few things to consider: First, ensure that the sealing surface on the engine block is clean and free of any old gasket material or debris. Even a tiny imperfection can cause a persistent leak. The pan itself might be fine, but if the mating surface isn't perfectly clean and smooth, sealing can be an issue. Second, check for any cracks or damage to the engine block around the sealing area. It's rare, but a hairline crack could be causing the leak. Lastly, it's worth considering the possibility of a leak from another nearby component, such as a timing cover or rear main seal, that's trickling down to the oil pan area and making it seem like the pan is the culprit. If you need any further advice or if you'd like any help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!