It takes about an hour to replace an oil pan gasket if you have the right tools and know-how to use them. The replacement process for an oil pan gasket is not complicated, but it can be messy. Here's what you'll need: -Oil pan gasket  -Rag  -Socket set  -Ratchet  -Impact socket  -Torque wrench  -Flathead screwdriver  -Adjustable wrench  -Work gloves