To perform operations involving the removal and installation of the component, first leads should be disconnected and the vehicle should be securely placed on a jack stand. For the non-4WD Civic Wagon, if equipped, the engine splash shield must be removed, engine oil must be drained and disposed appropriately. Next, if needed, take off the exhaust header pipe, then the bolts accompanied by the oil pan, finally-the oil pan as well. Before installing the new oil pan gasket, the gasket mating surfaces must be cleaned and, on both sides of the new oil pan gasket, an application of sealant must be made and the bolts tightened in a crisscross manner with a total torque of 9 ft. lbs. (12 Nm) and, later, to 33 ft. lbs. (45 Nm). For the 4WD Civic Wagon with manual transaxle proceed as follows: remove the air box as before, drain both the engine oil and transaxle oil also, remove the exhaust header pipe and locate the position of the drive shaft flange by placing a mark on it before it is removed. Be gentle during the removal of the left side cover and the driven gear from the transfer case in order not to damage the thrust shims. If the transfer case and clutch case cover have been removed, all the mating surfaces must be cleaned before putting a new gasket for the oil pan with sealant applied on it and must be fastened firmly in the same way as done before. For the automatic transaxle it is also the same as for the manual transaxle but without received components: the driven gear assembly and the left side cover. Use a clean rag and clean the oil pan surface, apply sealant, fit the oil pan gasket and tighten it. Last, reattach the drive shaft, exhaust header pipe as well as the splash shields back on, add both crankcase and transaxle oil, reconnect the negative terminal on the battery, turn the engine on and run it for a few minutes; take it for a short drive to check for any signs of leakage.