In order to remove the oil pan it I necessary to discharge the engine oil and subframe as well. When disconnecting the automatic transaxles, remove the torque converter cover bolts and if for the manual transaxles, remove the bellhousing brace fixed on the transaxle side as well as that on the engine side. After that, slightly rotate the oil pan bolts in an interlocking fashion until the oil pan is detached from the lower crankcase. If all the above measures fail to remove the oil pan, then use a rubber mallet or even place a block of wood on the top of the oil pan then firmly hit it with a hammer, you might also need to use an oil pan gasket cutter at this stage. For installation, remove all traces of gasket material from the lower crankcase and oil pan by using gasket scraper, and if available wash off all the oil film with acetone or lacquer thinner. Spread a 2 mm thick layer of RTV sealant around the periphery of the oil pan, but inboard of the bolts holes; fit the oil pan back on the engine block and fasten the bolts in a x-matter fashion starting with the middle bolts then outside bolts to the specified torque. Lastly, top up the crankcase with the recommended engine oil for your vehicle, and replace the oil filter.