Cadillac Seville significant oil leak from rear main seal after 6 months of slow leakage on Cadillac Seville

Some Cadillac Seville owners report experiencing significant oil leaks from the rear main seal, often starting as slow leaks that can lead to puddling of oil in the driveway. This leakage may pool on the bell housing of the engine and transmission, indicating a more serious issue. Repairing a rear main seal leak is commonly described as labor-intensive and expensive, with costs at a Cadillac dealer potentially reaching around $2000 due to the complexity of separating the engine and transmission. Additionally, some owners find that rear main seal leaks can occur alongside leaks from the oil pan gasket and transmission pan gaskets. For those considering a DIY repair, it involves extensive steps such as removing the exhaust and oil pan to access the rear main seal. Promptly addressing this issue is crucial to prevent further oil loss and potential engine damage, and consulting a mechanic or Cadillac dealer is advisable for effective resolution.